10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

  ____________________________________

FORM 10-Q

____________________________________

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2018

OR

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number: 000-51398

FEDERAL HOME LOAN BANK OF SAN FRANCISCO

(Exact name of registrant as specified in its charter)

  ____________________________________

Federally chartered corporation	94-6000630
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification number)
600 California Street San Francisco, CA	94108
(Address of principal executive offices)	(Zip code)

(415) 616-1000

(Registrant’s telephone number, including area code)

  ____________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing for the past 90 days.    x  Yes    o  No

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    x  Yes    o  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	o	Accelerated filer	o
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	o
		Emerging growth company	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.      o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    o  Yes    x  No

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

	Shares Outstanding as of July 31, 2018
Class B Stock, par value $100	31,014,964

Federal Home Loan Bank of San Francisco

Form 10-Q

Index

PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements	3
	Statements of Condition (Unaudited)	3
	Statements of Income (Unaudited)	4
	Statements of Comprehensive Income (Unaudited)	5
	Statements of Capital Accounts (Unaudited)	6
	Statements of Cash Flows (Unaudited)	7
	Notes to Financial Statements (Unaudited)	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	56
	Quarterly Overview	57
	Financial Highlights	58
	Results of Operations	59
	Financial Condition	72
	Liquidity and Capital Resources	83
	Risk Management	85
	Critical Accounting Policies and Estimates	103
	Recently Issued Accounting Standards and Interpretations	104
	Recent Developments	104
	Off-Balance Sheet Arrangements and Other Commitments	105
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	105
Item 4.	Controls and Procedures	110
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	111
Item 1A.	Risk Factors	111
Item 6.	Exhibits	112
Signatures		113

PART I. FINANCIAL INFORMATION

ITEM 1.    FINANCIAL STATEMENTS

Federal Home Loan Bank of San Francisco

Statements of Condition

(Unaudited)

(In millions-except par value)	June 30, 2018		December 31, 2017
Assets:
Cash and due from banks	$	44	$	31
Interest-bearing deposits	2,035		1,115
Securities purchased under agreements to resell	4,000		11,750
Federal funds sold	8,727		11,028
Trading securities(a)	662		1,164
Available-for-sale (AFS) securities(a)	3,510		3,833
Held-to-maturity (HTM) securities (fair values were $13,739 and $14,704, respectively)(a)	13,769		14,680
Advances (includes $6,083 and $6,431 at fair value under the fair value option, respectively)	70,314		77,382
Mortgage loans held for portfolio, net of allowance for credit losses of $0 and $0, respectively	2,728		2,076
Accrued interest receivable	161		119
Premises, software, and equipment, net	22		29
Derivative assets, net	141		83
Other assets	95		95
Total Assets	$	106,208	$	123,385
Liabilities:
Deposits	$	379	$	281
Consolidated obligations:
Bonds (includes $1,404 and $949 at fair value under the fair value option, respectively)	74,061		85,063
Discount notes	24,519		30,440
Total consolidated obligations	98,580		115,503
Mandatorily redeemable capital stock	255		309
Accrued interest payable	131		116
Affordable Housing Program (AHP) payable	198		204
Derivative liabilities, net	2		1
Other liabilities	164		165
Total Liabilities	99,709		116,579
Commitments and Contingencies (Note 17)
Capital:
Capital stock—Class B—Putable ($100 par value) issued and outstanding:
29 shares and 32 shares, respectively	2,850		3,243
Unrestricted retained earnings	2,707		2,670
Restricted retained earnings	612		575
Total Retained Earnings	3,319		3,245
Accumulated other comprehensive income/(loss) (AOCI)	330		318
Total Capital	6,499		6,806
Total Liabilities and Capital	$	106,208	$	123,385

(a) At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

The accompanying notes are an integral part of these financial statements.

3

Federal Home Loan Bank of San Francisco

Statements of Income

(Unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
(In millions)	2018			2017			2018			2017
Interest Income:
Advances	$	379		$	193		$	748		$	346
Prepayment fees on advances, net	1			—			1			—
Interest-bearing deposits	6			2			10			3
Securities purchased under agreements to resell	23			3			32			4
Federal funds sold	42			26			93			45
Trading securities	4			4			8			8
AFS securities	56			60			113			121
HTM securities	87			67			168			134
Mortgage loans held for portfolio	23			11			44			20
Total Interest Income	621			366			1,217			681
Interest Expense:
Consolidated obligations:
Bonds	339			147			646			263
Discount notes	122			67			256			121
Deposits	1			1			2			1
Mandatorily redeemable capital stock	5			7			11			18
Total Interest Expense	467			222			915			403
Net Interest Income	154			144			302			278
Provision for/(reversal of) credit losses on mortgage loans	—			—			—			—
Net Interest Income After Mortgage Loan Loss Provision	154			144			302			278
Other Income/(Loss):
Total other-than-temporary impairment (OTTI) loss	(13		)	(7		)	(16		)	(8		)
Net amount of OTTI loss reclassified to/(from) AOCI	8			1			10			(1		)
Net OTTI loss, credit-related	(5		)	(6		)	(6		)	(9		)
Net gain/(loss) on trading securities	—			(1		)	(1		)	—
Net gain/(loss) on advances and consolidated obligation bonds held under fair value option	(12		)	5			(53		)	4
Net gain/(loss) on derivatives and hedging activities	17			(19		)	48			(28		)
Gains on litigation settlements, net	—			—			—			119
Other	5			5			9			10
Total Other Income/(Loss)	5			(16		)	(3		)	96
Other Expense:
Compensation and benefits	19			19			40			38
Other operating expense	16			16			30			30
Federal Housing Finance Agency	2			1			3			3
Office of Finance	1			2			3			3
Quality Jobs Fund expense	5			—			15			40
Other, net	—			1			1			5
Total Other Expense	43			39			92			119
Income/(Loss) Before Assessment	116			89			207			255
AHP Assessment	12			9			22			27
Net Income/(Loss)	$	104		$	80		$	185		$	228

The accompanying notes are an integral part of these financial statements.

4

Federal Home Loan Bank of San Francisco

Statements of Comprehensive Income

(Unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
(In millions)	2018			2017			2018			2017
Net Income/(Loss)	$	104		$	80		$	185		$	228
Other Comprehensive Income/(Loss):
Net change in pension and postretirement benefits	—			—			1			—
Net non-credit-related OTTI gain/(loss) on AFS securities:
Net change in fair value of other-than-temporarily impaired securities	3			84			20			113
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(8		)	(1		)	(10		)	1
Total net non-credit-related OTTI gain/(loss) on AFS securities	(5		)	83			10			114
Net non-credit-related OTTI gain/(loss) on HTM securities:
Accretion of non-credit-related OTTI loss	—			1			1			2
Total net non-credit-related OTTI gain/(loss) on HTM securities	—			1			1			2
Total other comprehensive income/(loss)	(5		)	84			12			116
Total Comprehensive Income/(Loss)	$	99		$	164		$	197		$	344

The accompanying notes are an integral part of these financial statements.

5

Federal Home Loan Bank of San Francisco

Statements of Capital Accounts

(Unaudited)

	Capital Stock Class B—Putable					Retained Earnings										Total Capital
(In millions)	Shares		Par Value			Restricted		Unrestricted			Total			AOCI
Balance, December 31, 2016	24		$	2,370		$	2,168	$	888		$	3,056		$	111	$	5,537
Comprehensive income/(loss)						149		79			228			116		344
Issuance of capital stock	5		551													551
Repurchase of capital stock	(2	)	(232		)											(232		)
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net	—		(2		)											(2		)
Cash dividends paid on capital stock (8.04%)								(95		)	(95		)			(95		)
Balance, June 30, 2017	27		$	2,687		$	2,317	$	872		$	3,189		$	227	$	6,103
Balance, December 31, 2017	32		$	3,243		$	575	$	2,670		$	3,245		$	318	$	6,806
Comprehensive income/(loss)						37		148			185			12		197
Issuance of capital stock	7		681													681
Repurchase of capital stock	(10	)	(1,072		)											(1,072		)
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net	—		(2		)											(2		)
Cash dividends paid on capital stock (7.00%)								(111		)	(111		)			(111		)
Balance, June 30, 2018	29		$	2,850		$	612	$	2,707		$	3,319		$	330	$	6,499

The accompanying notes are an integral part of these financial statements.

6

Federal Home Loan Bank of San Francisco

Statements of Cash Flows

(Unaudited)

	Six Months Ended June 30,
(In millions)	2018			2017
Cash Flows from Operating Activities:
Net Income/(Loss)	$	185		$	228
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation and amortization	(24		)	(23		)
Change in net fair value of trading securities	1			—
Change in net fair value adjustment on advances and consolidated obligation bonds held under the fair value option	53			(4		)
Change in net derivatives and hedging activities	140			12
Net OTTI loss, credit-related	6			9
Net change in:
Accrued interest receivable	(44		)	7
Other assets	(3		)	17
Accrued interest payable	19			9
Other liabilities	(16		)	(17		)
Total adjustments	132			10
Net cash provided by/(used in) operating activities	317			238
Cash Flows from Investing Activities:
Net change in:
Interest-bearing deposits	(1,105		)	(176		)
Securities purchased under agreements to resell	7,750			(1,000		)
Federal funds sold	2,301			(3,988		)
Premises, software, and equipment	—			(11		)
Trading securities:
Proceeds from maturities of long-term	501			801
AFS securities:
Proceeds from maturities of long-term	381			476
HTM securities:
Net (increase)/decrease in short-term	(50		)	450
Proceeds from maturities of long-term	1,582			1,456
Purchases of long-term	(629		)	(1,998		)
Advances:
Repaid	999,983			815,993
Originated	(993,050		)	(821,323		)
Mortgage loans held for portfolio:
Principal collected	132			65
Purchases	(777		)	(610		)
Proceeds from sales of foreclosed assets	—			2
Net cash provided by/(used in) investing activities	17,019			(9,863		)

7

Federal Home Loan Bank of San Francisco

Statements of Cash Flows (continued)

(Unaudited)

	Six Months Ended June 30,
(In millions)	2018			2017
Cash Flows from Financing Activities:
Net change in deposits and other financing activities	111			269
Borrowings from other FHLBanks	—			(1,345		)
Net proceeds from issuance of consolidated obligations:
Bonds	41,662			34,821
Discount notes	72,788			78,530
Payments for matured and retired consolidated obligations:
Bonds	(52,606		)	(24,072		)
Discount notes	(78,720		)	(78,719		)
Proceeds from issuance of capital stock	681			551
Payments for repurchase/redemption of mandatorily redeemable capital stock	(56		)	(55		)
Payments for repurchase of capital stock	(1,072		)	(232		)
Cash dividends paid	(111		)	(95		)
Net cash provided by/(used in) financing activities	(17,323		)	9,653
Net increase/(decrease) in cash and due from banks	13			28
Cash and due from banks at beginning of the period	31			2
Cash and due from banks at end of the period	$	44		$	30
Supplemental Disclosures:
Interest paid	$	888		$	391
AHP payments	29			23
Supplemental Disclosures of Noncash Investing and Financing Activities:
Transfers of other-than-temporarily impaired HTM securities to AFS securities	12			—
Transfers of capital stock to mandatorily redeemable capital stock	2			2

The accompanying notes are an integral part of these financial statements.

8

Federal Home Loan Bank of San Francisco

Notes to Financial Statements

(Unaudited)

(Dollars in millions except per share amounts)

Note 1 — Basis of Presentation

The information about the Federal Home Loan Bank of San Francisco (Bank) included in these unaudited financial statements reflects all adjustments that, in the opinion of the Bank, are necessary for a fair statement of results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed. The results of operations in these interim statements are not necessarily indicative of the results to be expected for any subsequent period or for the entire year ending December 31, 2018. These unaudited financial statements should be read in conjunction with the Bank’s Annual Report on Form 10-K for the year ended December 31, 2017 (2017 Form 10‑K).

Use of Estimates. The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make a number of judgments, estimates, and assumptions that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income, expenses, gains, and losses during the reporting period. The most significant of these estimates include estimating the allowance for credit losses on the advances and mortgage loan portfolios; accounting for derivatives; estimating fair values of investments classified as trading and available-for-sale, derivatives and associated hedged items carried at fair value in accordance with the accounting for derivative instruments and associated hedging activities, and financial instruments carried at fair value under the fair value option, and accounting for other-than-temporary impairment (OTTI) for investment securities; and estimating the prepayment speeds on mortgage-backed securities (MBS) and mortgage loans for the accounting of amortization of premiums and accretion of discounts on MBS and mortgage loans. Actual results could differ significantly from these estimates.

Financial Instruments Meeting Netting Requirements. The Bank presents certain financial instruments, including derivative instruments and securities purchased under agreements to resell, on a net basis when they have a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). The Bank has elected to offset its derivative asset and liability positions, as well as cash collateral received or pledged, when the netting requirements are met. The Bank did not have any offsetting liabilities related to its securities purchased under agreements to resell for the periods presented.

The net exposure for these financial instruments can change on a daily basis; therefore, there may be a delay between the time this exposure change is identified and additional collateral is requested, and the time this collateral is received or pledged. Likewise, there may be a delay for excess collateral to be returned. For derivative instruments that meet the netting requirements, any excess cash collateral received or pledged is recognized as a derivative liability or derivative asset. Additional information regarding these agreements is provided in Note 15 – Derivatives and Hedging Activities. Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented.

Derivatives. All derivatives are recognized on the Statements of Condition at their fair values and are reported as either derivative assets or derivative liabilities, net of cash collateral, including initial and certain variation margin, and accrued interest received from or pledged to clearing agents and/or counterparties. The fair values of derivatives are netted by clearing agent and/or counterparty when the netting requirements have been met. If these netted amounts are positive, they are classified as an asset, and if negative, they are classified as a liability. Cash flows associated with derivatives are reflected as cash flows from operating activities on the Statements of Cash Flows unless the derivative meets the criteria to be a financing derivative.

The Bank uses the clearinghouse, London Clearing House (LCH) Ltd, for all cleared derivative transactions. Effective January 16, 2018, LCH Ltd made certain amendments to its rulebook, changing the legal characterization

9

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

of variation margin payments to be daily settlement payments, rather than collateral. Initial margin continues to be considered cash collateral.

Variable Interest Entities. The Bank’s investments in variable interest entities (VIEs) are limited to private-label residential mortgage-backed securities (PLRMBS). On an ongoing basis, the Bank performs a quarterly evaluation to determine whether it is the primary beneficiary in any VIE. The Bank evaluated its investments in VIEs as of June 30, 2018, to determine whether it is a primary beneficiary of any of these investments. The primary beneficiary is required to consolidate a VIE. The Bank determined that consolidation accounting is not required because the Bank is not the primary beneficiary of these VIEs for the periods presented. The Bank does not have the power to significantly affect the economic performance of any of these investments because it does not act as a key decision maker nor does it have the unilateral ability to replace a key decision maker. In addition, the Bank does not design, sponsor, transfer, service, or provide credit or liquidity support in any of its investments in VIEs. The Bank’s maximum loss exposure for these investments is limited to the carrying value.

Descriptions of the Bank’s significant accounting policies are included in “Item 8. Financial Statements and Supplementary Data – Note 1 – Summary of Significant Accounting Policies” in the Bank’s 2017 Form 10-K. Other changes to these policies as of June 30, 2018, are discussed in Note 2 – Recently Issued and Adopted Accounting Guidance.

Note 2 — Recently Issued and Adopted Accounting Guidance

Targeted Improvements to Accounting for Hedging Activities. On August 28, 2017, the Financial Accounting Standards Board (FASB) issued amended guidance to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. This guidance requires that, for fair value hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness be presented in the same income statement line that is used to present the earnings effect of the hedged item. For cash flow hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness must be recorded in other comprehensive income. In addition, the amendments include certain targeted improvements to the assessment of hedge effectiveness and permit, among other things, the following:

• Measurement of the change in fair value of the hedged item on the basis of the benchmark rate component of the contractual coupon cash flows determined at hedge inception.

• Measurement of the hedged item in a partial-term fair value hedge of interest rate risk by assuming the hedged item has a term that reflects only the designated cash flows being hedged.

• Consideration only of how changes in the benchmark interest rate affect a decision to settle a prepayable instrument before its scheduled maturity in calculating the change in the fair value of the hedged item attributable to interest rate risk.

• For a cash flow hedge of interest rate risk of a variable-rate financial instrument, an entity could designate as the hedged risk the variability in cash flows attributable to the contractually specified interest rate.

This guidance becomes effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. The amended presentation and disclosure guidance is required only prospectively. The Bank does not intend to adopt this guidance early. The Bank is in the process of evaluating this guidance, and its effect on the Bank’s financial condition, results of operations, cash flows, and financial statement disclosures has not yet been determined.

Premium Amortization on Purchased Callable Debt Securities. On March 30, 2017, the FASB issued amended guidance to shorten the amortization period for certain purchased callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). This guidance is

10

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. This guidance should be applied using a modified retrospective method through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this guidance is not expected to have any effect on the Bank’s financial condition, results of operations, or cash flows.

Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. On March 10, 2017, the FASB issued amended guidance to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the Statements of Income. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018, and was adopted retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Statements of Income. The adoption of this guidance did not have a material effect on the Bank’s financial condition, results of operations, cash flows, or financial statement disclosures.

Classification of Certain Cash Receipts and Cash Payments. On August 26, 2016, the FASB issued amendments to clarify guidance on the classification of certain cash receipts and payments in the Statements of Cash Flows. This guidance is intended to reduce existing diversity in practice in how certain cash receipts and cash payments are presented and classified on the Statements of Cash Flows. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018. The adoption of this guidance did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Measurement of Credit Losses on Financial Instruments. On June 16, 2016, the FASB issued amended guidance for the accounting for credit losses on financial instruments. The amendments require entities to measure expected credit losses based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate under the circumstances. In addition, under the new guidance, a financial asset, or a group of financial assets, is required to be measured at its amortized cost to be presented at the net amount expected to be collected over the contractual term of the financial assets. Among other things, the guidance also requires:

• The Statement of Income to reflect the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period.

• The entities to determine the allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination that are measured at amortized cost basis in a similar manner to other financial assets measured at amortized cost basis. The initial allowance for credit losses is required to be added to the purchase price.

• Credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The amendments limit the allowance for credit losses to the amount by which fair value is below amortized cost.

• Public entities to further disaggregate the current disclosure of credit quality indicators in relation to the amortized cost of financing receivables by the year of origination (i.e., vintage).

The guidance is effective for the Bank for interim and annual periods beginning on January 1, 2020. Early application is permitted as of the interim and annual reporting periods beginning after December 15, 2018. The guidance should be applied using a modified-retrospective approach, through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. In addition, the entities are required to use a prospective transition approach for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination and for debt securities for which an other-than-temporary impairment had been recognized before the effective date. The Bank does not intend to adopt the guidance early. The Bank is in the process of evaluating this guidance and expects the adoption of the guidance may

11

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

result in an increase in the allowance for credit losses given the requirement to assess losses for the entire estimated life of the financial asset, including an allowance for debt securities. The effect on the Bank’s financial condition, results of operations, and cash flows will depend on the composition of financial assets held by the Bank at the adoption date, as well as on economic conditions and forecasts at that time.

Recognition of Lease Assets and Lease Liabilities. On February 25, 2016, the FASB issued guidance that requires recognition of lease assets and lease liabilities on the Statements of Condition and disclosure of key information about leasing arrangements. In particular, this guidance requires a lessee of operating or finance leases to recognize on the Statements of Condition a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. However, for leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. Under previous U.S. GAAP, a lessee was not required to recognize lease assets and lease liabilities arising from operating leases on the Statements of Condition. While this guidance does not fundamentally change lessor accounting, some changes have been made to align that guidance with the lessee guidance and other areas within U.S. GAAP.

The guidance becomes effective for the Bank for the interim and annual periods beginning on January 1, 2019, and early application is permitted. The guidance requires lessors and lessees to recognize and measure leases at the beginning of the earliest period presented in the financial statements using a modified retrospective approach. The Bank does not intend to adopt this guidance early. Upon adoption, the Bank expects to report higher assets and liabilities as a result of recording right-of-use assets and lease liabilities for its existing leases on the Statements of Condition. The Bank is in the process of evaluating this guidance, but its effect on the Bank’s financial condition, results of operations, and cash flows is not expected to be material.

Recognition and Measurement of Financial Assets and Financial Liabilities. On January 5, 2016, the FASB issued amended guidance on certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. This guidance includes, but is not limited to, the following:

• Requires equity investments (with certain exceptions) to be measured at fair value with changes in fair value recognized in net income;

• Requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments;

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the Statement of Condition or in the accompanying notes to the financial statements;

• Eliminates the requirement for public entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the Statement of Condition.

The guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. While the adoption of this guidance affected the Bank’s disclosures, the requirement to present the instrument-specific credit risk in other comprehensive income did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Revenue from Contracts with Customers. On May 28, 2014, the FASB issued guidance on revenue from contracts with customers. This guidance applies to all contracts with customers except those that are within the scope of certain other standards, such as financial instruments, certain guarantees, insurance contracts, and lease contracts. This guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. Given that the majority of the Bank's financial instruments and other contractual rights that generate revenue are covered by other U.S. GAAP, the adoption of this guidance did not have any effect on the Bank's financial condition, results of operations, or cash flows.

12

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Note 3 — Trading Securities

The estimated fair value of trading securities as of June 30, 2018, and December 31, 2017, was as follows:

	June 30, 2018		December 31, 2017
Government-Sponsored Enterprises (GSEs) – Federal Farm Credit Bank (FFCB) bonds	$	657	$	1,158
MBS – Other U.S. obligations – Ginnie Mae	5		6
Total	$	662	$	1,164

The net unrealized gain/(loss) on trading securities was de minimis and $(1) for the three months ended June 30, 2018 and 2017, respectively. The net unrealized gain/(loss) on trading securities was $(1) and de minimis for the six months ended June 30, 2018 and 2017, respectively. These amounts represent the changes in the fair value of the securities during the reported periods.

Note 4 — Available-for-Sale Securities

Available-for-sale (AFS) securities by major security type as of June 30, 2018, and December 31, 2017, were as follows:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	294	$	—		$	29	$	—	$	323
Alt-A, option ARM	639		(7		)	137		—		769
Alt-A, other	2,230		(13		)	201		—		2,418
Total	$	3,163	$	(20	)	$	367	$	—	$	3,510

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	335	$	—		$	29	$	—	$	364
Alt-A, option ARM	714		(10		)	130		—		834
Alt-A, other	2,447		(23		)	211		—		2,635
Total	$	3,496	$	(33	)	$	370	$	—	$	3,833

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings.

Expected maturities of PLRMBS will differ from contractual maturities because borrowers generally have the right to prepay the underlying obligations without prepayment fees.

At June 30, 2018, the amortized cost of the Bank’s PLRMBS classified as AFS included credit-related OTTI of $742. At December 31, 2017, the amortized cost of the Bank’s PLRMBS classified as AFS included credit-related OTTI of $801.

The following table summarizes the AFS securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to

13

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

total gross unrealized losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of AFS securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	2	$	—	$	8	$	—	$	10	$	—
Alt-A, option ARM	—		—		137		7		137		7
Alt-A, other	49		—		277		13		326		13
Total	$	51	$	—	$	422	$	20	$	473	$	20

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	—	$	—	$	11	$	—	$	11	$	—
Alt-A, option ARM	—		—		144		10		144		10
Alt-A, other	5		—		356		23		361		23
Total	$	5	$	—	$	511	$	33	$	516	$	33

As indicated in the tables above, as of June 30, 2018, the Bank’s investments classified as AFS had unrealized losses related to PLRMBS, which were primarily due to illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost.

See Note 6 – Other-Than-Temporary Impairment Analysis for information on the transfers of securities between the AFS portfolio and the HTM portfolio.

14

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Note 5 — Held-to-Maturity Securities

The Bank classifies the following securities as HTM because the Bank has the positive intent and ability to hold these securities to maturity:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	550	$	—		$	550	$	—	$	—		$	550
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	$	155	$	—		$	155	$	—	$	(8	)	$	147
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	678		—			678		—		(12		)	666
GSEs – single-family:
Freddie Mac	1,760		—			1,760		7		(33		)	1,734
Fannie Mae	3,098		—			3,098		23		(20		)	3,101
Subtotal GSEs – single-family	4,858		—			4,858		30		(53		)	4,835
GSEs – multifamily:
Freddie Mac	4,855		—			4,855		6		—			4,861
Fannie Mae	1,993		—			1,993		—		(1		)	1,992
Subtotal GSEs – multifamily	6,848		—			6,848		6		(1		)	6,853
Subtotal GSEs	11,706		—			11,706		36		(54		)	11,688
PLRMBS:
Prime	443		—			443		4		(4		)	443
Alt-A, other	242		(5		)	237		10		(2		)	245
Subtotal PLRMBS	685		(5		)	680		14		(6		)	688
Total MBS	13,069		(5		)	13,064		50		(72		)	13,042
Total	$	13,774	$	(5	)	$	13,769	$	50	$	(80	)	$	13,739

15

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	500	$	—		$	500	$	—	$	—		$	500
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	187		—			187		—		(9		)	178
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	751		—			751		1		(1		)	751
GSEs – single-family:
Freddie Mac	2,039		—			2,039		12		(15		)	2,036
Fannie Mae	3,600		—			3,600		34		(8		)	3,626
Subtotal GSEs – single-family	5,639		—			5,639		46		(23		)	5,662
GSEs – multifamily:
Freddie Mac	4,651		—			4,651		6		(6		)	4,651
Fannie Mae	2,131		—			2,131		2		—			2,133
Subtotal GSEs – multifamily	6,782		—			6,782		8		(6		)	6,784
Subtotal GSEs	12,421		—			12,421		54		(29		)	12,446
PLRMBS:
Prime	521		—			521		5		(6		)	520
Alt-A, other	306		(6		)	300		11		(2		)	309
Subtotal PLRMBS	827		(6		)	821		16		(8		)	829
Total MBS	13,999		(6		)	13,993		71		(38		)	14,026
Total	$	14,686	$	(6	)	$	14,680	$	71	$	(47	)	$	14,704

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

At June 30, 2018, the amortized cost of the Bank’s MBS classified as HTM included premiums of $16, discounts of $21, and credit-related OTTI of $7. At December 31, 2017, the amortized cost of the Bank’s MBS classified as HTM included premiums of $19, discounts of $24, and credit-related OTTI of $7.

The following tables summarize the HTM securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to the total gross unrecognized holding losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of HTM securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

16

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	147	$	8	$	147	$	8
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	604		12		—		—		604		12
GSEs – single-family:
Freddie Mac	1,015		23		280		10		1,295		33
Fannie Mae	944		14		177		6		1,121		20
Subtotal GSEs – single-family	1,959		37		457		16		2,416		53
GSEs – multifamily:
Freddie Mac	444		—		—		—		444		—
Fannie Mae	950		1		133		—		1,083		1
Subtotal GSEs – multifamily	1,394		1		133		—		1,527		1
Subtotal GSEs	3,353		38		590		16		3,943		54
PLRMBS:
Prime	23		—		148		4		171		4
Alt-A, other	44		—		139		7		183		7
Subtotal PLRMBS	67		—		287		11		354		11
Total MBS	4,024		50		877		27		4,901		77
Total	$	4,024	$	50	$	1,024	$	35	$	5,048	$	85

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	178	$	9	$	178	$	9
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	406		1		—		—		406		1
GSEs – single-family:
Freddie Mac	895		9		323		6		1,218		15
Fannie Mae	702		4		205		4		907		8
Subtotal GSEs – single-family	1,597		13		528		10		2,125		23
GSEs – multifamily:
Freddie Mac	1,058		6		—		—		1,058		6
Fannie Mae	456		—		—		—		456		—
Subtotal GSEs – multifamily	1,514		6		—		—		1,514		6
Subtotal GSEs	3,111		19		528		10		3,639		29
PLRMBS:
Prime	2		—		202		6		204		6
Alt-A, other	15		—		191		8		206		8
Subtotal PLRMBS	17		—		393		14		410		14
Total MBS	3,534		20		921		24		4,455		44
Total	$	3,534	$	20	$	1,099	$	33	$	4,633	$	53

17

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

As indicated in the tables above, the Bank’s investments classified as HTM had unrealized losses on CalHFA bonds and MBS. The unrealized losses associated with the CalHFA bonds were mainly due to an illiquid market, credit concerns regarding the underlying mortgage collateral, and credit concerns regarding the monoline insurance providers, causing these investments to be valued at a discount to their acquisition cost. For its agency MBS, the Bank expects to recover the entire amortized cost basis of these securities because the Bank determined that the strength of the issuers’ guarantees through direct obligations or support from the U.S. government is sufficient to protect the Bank from losses. The unrealized losses associated with the PLRMBS were primarily due to illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost.

Redemption Terms. The amortized cost, carrying value, and estimated fair value of non-MBS securities by contractual maturity (based on contractual final principal payment) and of MBS as of June 30, 2018, and December 31, 2017, are shown below. Expected maturities of MBS will differ from contractual maturities because borrowers generally have the right to prepay the underlying obligations without prepayment fees.

June 30, 2018
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	550	$	550	$	550
Due after 10 years	155		155		147
Subtotal	705		705		697
MBS	13,069		13,064		13,042
Total	$	13,774	$	13,769	$	13,739

December 31, 2017
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	500	$	500	$	500
Due after 5 years through 10 years	12		12		12
Due after 10 years	175		175		166
Subtotal	687		687		678
MBS	13,999		13,993		14,026
Total	$	14,686	$	14,680	$	14,704

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

See Note 6 – Other-Than-Temporary Impairment Analysis for information on the transfers of securities between the AFS portfolio and the HTM portfolio.

Note 6 — Other-Than-Temporary Impairment Analysis

On a quarterly basis, the Bank evaluates its individual AFS and HTM investment securities in an unrealized loss position for OTTI. As part of this evaluation, the Bank considers whether it intends to sell each debt security and whether it is more likely than not that it will be required to sell the debt security before its anticipated recovery of the amortized cost basis. If either of these conditions is met, the Bank recognizes an OTTI charge to earnings equal to the entire difference between the security’s amortized cost basis and its fair value at the statement of condition date. For securities in an unrealized loss position that do not meet either of these conditions, the Bank considers whether it expects to recover the entire amortized cost basis of the security by comparing its best estimate of the present value of the cash flows expected to be collected from the security with the amortized cost basis of the

18

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

security. If the Bank’s best estimate of the present value of the cash flows expected to be collected is less than the amortized cost basis, the difference is considered the credit loss.

PLRMBS. A significant input to the Bank’s cash flow analysis of its PLRMBS is the forecast of future housing price changes. The OTTI Governance Committee of the Federal Home Loan Banks (FHLBanks) developed a short-term housing price forecast with projected changes ranging from a decrease of 8.0% to an increase of 13.0% over the 12-month period beginning April 1, 2018. For the vast majority of markets, the projected short-term housing price changes range from an increase of 2.0% to an increase of 7.0%. Thereafter, a unique path is projected for each geographic area based on an internally developed framework derived from historical data.

For all the PLRMBS in its AFS and HTM portfolios, the Bank does not intend to sell any security and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

For securities determined to be other-than-temporarily impaired as of June 30, 2018 (securities for which the Bank determined that it does not expect to recover the entire amortized cost basis), the following table presents a summary of the significant inputs used in measuring the amount of credit loss recognized in earnings during the second quarter of 2018, and the related current credit enhancement for the Bank.

June 30, 2018
	Significant Inputs for Other-Than-Temporarily Impaired PLRMBS			Current
	Prepayment Rates	Default Rates	Loss Severities	Credit Enhancement
Year of Securitization	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)
Alt-A, option ARM
2006	7.7	40.9	34.8	—
Total Alt-A, option ARM	7.7	40.9	34.8	—
Alt-A, other
2007	10.0	28.4	40.6	0.3
2006	10.6	25.4	39.4	20.6
2005	14.4	13.8	34.4	0.1
2004 and earlier	17.7	12.6	32.3	14.0
Total Alt-A, other	10.8	25.9	39.5	8.4
Total	10.4	27.8	38.9	7.4

(1) Weighted average percentage is based on unpaid principal balance.

Credit enhancement is defined as the percentage of subordinated tranches, excess spread, and over-collateralization, if any, in a security structure that will generally absorb losses before the Bank will experience a loss on the security. The calculated averages represent the dollar-weighted averages of all the PLRMBS investments in each category shown. The classification is based on the model used to run the estimated cash flows for the CUSIP, which may not necessarily be the same as the classification at the time of origination.

The following table presents the credit-related OTTI, which is recognized in earnings, for the three and six months ended June 30, 2018 and 2017.

19

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Balance, beginning of the period	$	1,113		$	1,169		$	1,129		$	1,183
Additional charges on securities for which OTTI was previously recognized(1)	5			6			6			9
Accretion of yield adjustments resulting from improvement of expected cash flows that are recognized over the remaining life of the securities(2)	(15		)	(17		)	(32		)	(34		)
Balance, end of the period	$	1,103		$	1,158		$	1,103		$	1,158

(1) For the three months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to April 1, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to January 1, 2018 and 2017, respectively.

(2) The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $20 and $23 for the three months ended June 30, 2018 and 2017, respectively. The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively.

Changes in circumstances may cause the Bank to change its intent to hold a certain security to maturity without calling into question its intent to hold other debt securities to maturity in the future. The sale or transfer of an HTM security because of certain changes in circumstances, such as evidence of significant deterioration in the issuers’ creditworthiness, is not considered to be inconsistent with its original classification. In addition, other events that are isolated, nonrecurring, or unusual for the Bank that could not have been reasonably anticipated may cause the Bank to sell or transfer an HTM security without necessarily calling into question its intent to hold other debt securities to maturity.

In general, the Bank elects to transfer any PLRMBS that incurred a credit-related OTTI charge during the applicable period from the Bank’s held-to-maturity portfolio to its available-for-sale portfolio at their fair values. The Bank recognized an OTTI credit loss on these held-to-maturity PLRMBS, which the Bank believes is evidence of a significant decline in the issuers’ creditworthiness. The decline in the issuers’ creditworthiness is the basis for the transfers to the available-for-sale portfolio. These transfers allow the Bank the option to sell these securities prior to maturity in view of changes in interest rates, changes in prepayment risk, or other factors, while recognizing the Bank’s intent to hold these securities for an indefinite period of time. The Bank does not intend to sell its other-than-temporarily impaired securities and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

The following table summarizes the PLRMBS transferred from the Bank’s HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2018. The amounts shown represent the values when the securities were transferred from the HTM portfolio to the AFS portfolio. The Bank did not transfer any PLRMBS from its HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2017.

	Three Months Ended June 30, 2018								Six Months Ended June 30, 2018
	Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value		Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Alt-A, other	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12
Total	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12

20

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

The following tables present the Bank’s AFS and HTM PLRMBS that incurred OTTI losses anytime during the life of the securities at June 30, 2018, and December 31, 2017, by loan collateral type:

June 30, 2018
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	356	$	294	$	323	$	—	$	—	$	—	$	—
Alt-A, option ARM	859		639		769		—		—		—		—
Alt-A, other	2,679		2,230		2,418		58		53		49		58
Total	$	3,894	$	3,163	$	3,510	$	58	$	53	$	49	$	58

December 31, 2017
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	405	$	335	$	364	$	—	$	—	$	—	$	—
Alt-A, option ARM	953		714		834		—		—		—		—
Alt-A, other	2,927		2,447		2,635		64		59		53		63
Total	$	4,285	$	3,496	$	3,833	$	64	$	59	$	53	$	63

For the Bank’s PLRMBS that were not other-than-temporarily impaired as of June 30, 2018, the Bank has experienced net unrealized losses primarily because of illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost. The Bank does not intend to sell these securities, it is not more likely than not that the Bank will be required to sell these securities before its anticipated recovery of the remaining amortized cost basis, and the Bank expects to recover the entire amortized cost basis of these securities. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on these PLRMBS are temporary. These securities were included in the securities that the Bank reviewed and analyzed for OTTI as discussed above, and the analyses performed indicated that these securities were not other-than-temporarily impaired.

All Other Available-for-Sale and Held-to-Maturity Investments. For the Bank’s investments in housing finance agency bonds, which were issued by CalHFA, the gross unrealized losses were mainly due to an illiquid market, credit concerns regarding the underlying mortgage collateral, and credit concerns regarding the monoline insurance providers, causing these investments to be valued at a discount to their acquisition cost. The Bank independently modeled cash flows for the underlying collateral, using assumptions for default rates and loss severity that a market participant would deem reasonable, and concluded that the available credit support within the CalHFA structure more than offset the projected underlying collateral losses. The Bank determined that, as of June 30, 2018, all of the gross unrealized losses on the bonds are temporary because the underlying collateral and credit enhancements were sufficient to protect the Bank from losses. As a result, the Bank expects to recover the entire amortized cost basis of these securities.

For its agency MBS, the Bank expects to recover the entire amortized cost basis of these securities because the Bank determined that the strength of the issuers’ guarantees through direct obligations or support from the U.S.

21

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

government is sufficient to protect the Bank from losses. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on its agency MBS are temporary.

Note 7 — Advances

The Bank offers a wide range of fixed and adjustable rate advance products with different maturities, interest rates, payment characteristics, and option features. Fixed rate advances generally have maturities ranging from one day to 30 years. Adjustable rate advances generally have maturities ranging from less than 30 days to 10 years, with the interest rates resetting periodically at a fixed spread to LIBOR or to another specified index.

Redemption Terms. The Bank had advances outstanding, excluding overdrawn demand deposit accounts, at interest rates ranging from 0.86% to 8.57% at June 30, 2018, and 0.79% to 8.57% at December 31, 2017, as summarized below.

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	41,660		2.03	%	$	46,403		1.46	%
After 1 year through 2 years	14,131			2.19		16,287			1.61
After 2 years through 3 years	7,524			2.30		5,423			1.73
After 3 years through 4 years	4,596			2.42		6,719			1.69
After 4 years through 5 years	1,550			2.48		1,741			2.10
After 5 years	1,092			3.24		913			3.13
Total par value	70,553			2.14	%	77,486			1.57	%
Valuation adjustments for hedging activities	(161		)			(88		)
Valuation adjustments under fair value option	(78		)			(16		)
Total	$	70,314				$	77,382

Many of the Bank’s advances are prepayable at the borrower’s option. However, when advances are prepaid, the borrower is generally charged a prepayment fee intended to make the Bank financially indifferent to the prepayment. In addition, for certain advances with partial prepayment symmetry, the Bank may charge the borrower a prepayment fee or pay the borrower a prepayment credit depending on certain circumstances, such as movements in interest rates, when the advance is prepaid. The Bank had advances with partial prepayment symmetry outstanding totaling $5,109 at June 30, 2018, and $4,619 at December 31, 2017. Some advances may be repaid on pertinent call dates without prepayment fees (callable advances). The Bank had callable advances outstanding totaling $12,817 at June 30, 2018, and $18,373 at December 31, 2017.

The Bank’s advances at June 30, 2018, included $10 of putable advances. The Bank had no outstanding putable advances at December 31, 2017. At the Bank’s discretion, the Bank may terminate these advances on predetermined exercise dates and offer replacement funding at prevailing market rates, subject to certain conditions. The Bank would typically exercise such termination rights when interest rates increase relative to contractual rates.

The following table summarizes advances at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date for callable advances and by the earlier of the year of contractual maturity or next put date for putable advances.

22

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

 

	Earlier of Contractual Maturity or Next Call Date				Earlier of Contractual Maturity or Next Put Date
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Within 1 year	$	45,877	$	52,624	$	41,665	$	46,403
After 1 year through 2 years	13,256		12,593		14,136		16,287
After 2 years through 3 years	7,224		7,973		7,524		5,423
After 3 years through 4 years	1,596		1,719		4,596		6,719
After 4 years through 5 years	1,544		1,729		1,550		1,741
After 5 years	1,056		848		1,082		913
Total par value	$	70,553	$	77,486	$	70,553	$	77,486

Credit and Concentration Risk. The following tables present the concentration in advances to the top five borrowers and their affiliates at June 30, 2018 and 2017. The tables also present the interest income from these advances before the impact of interest rate exchange agreements associated with these advances for the three and six months ended June 30, 2018 and 2017.

	June 30, 2018				Three Months Ended June 30, 2018				Six Months Ended June 30, 2018
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
MUFG Union Bank, National Association	$	13,400	19	%	$	60	16	%	$	104	14	%
First Republic Bank	10,250		14		46		13		81		11
JPMorgan Chase Bank, National Association(2)	9,361		13		54		15		104		14
Bank of the West	7,508		11		35		10		64		9
Wells Fargo Financial National Bank	4,000		6		21		6		38		6
Subtotal	44,519		63		216		60		391		54
Others	26,034		37		145		40		336		46
Total par value	$	70,553	100	%	$	361	100	%	$	727	100	%

	June 30, 2017				Three Months Ended June 30, 2017				Six Months Ended June 30, 2017
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
JPMorgan Chase Bank, National Association(2)	$	12,805	23	%	$	45	22	%	$	86	24	%
Bank of the West	9,110		17		19		10		33		9
First Republic Bank	7,700		14		28		14		48		14
MUFG Union Bank, National Association	4,600		8		6		3		8		2
CIT Bank, N.A.	2,396		4		8		4		16		4
Subtotal	36,611		66		106		53		191		53
Others	18,576		34		95		47		171		47
Total par value	$	55,187	100	%	$	201	100	%	$	362	100	%

(1) Interest income amounts exclude the interest effect of interest rate exchange agreements with derivative counterparties; as a result, the total interest income amounts will not agree to the Statements of Income. The amount of interest income from advances can vary depending on the amount outstanding, terms to maturity, interest rates, and repricing characteristics.

(2) Nonmember institution.

23

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

The Bank held a security interest in collateral from each of the top five advances borrowers and their affiliates sufficient to support their respective advances outstanding, and the Bank does not expect to incur any credit losses on these advances.

For information related to the Bank’s credit risk on advances and allowance methodology for credit losses, see Note 9 – Allowance for Credit Losses.

Interest Rate Payment Terms. Interest rate payment terms for advances at June 30, 2018, and December 31, 2017, are detailed below:

	June 30, 2018		December 31, 2017
Par value of advances:
Fixed rate:
Due within 1 year	$	23,275	$	31,767
Due after 1 year	17,185		13,022
Total fixed rate	40,460		44,789
Adjustable rate:
Due within 1 year	18,385		14,636
Due after 1 year	11,708		18,061
Total adjustable rate	30,093		32,697
Total par value	$	70,553	$	77,486

The Bank did not have any advances with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative at June 30, 2018, or December 31, 2017. The Bank has generally elected to account for certain advances with embedded features under the fair value option, and these advances are carried at fair value on the Statements of Condition. For more information, see Note 16 – Fair Value.

Note 8 — Mortgage Loans Held for Portfolio

Under the Mortgage Partnership Finance® (MPF®) Program, the Bank may purchase from members, for its own portfolio, conventional conforming fixed rate mortgage loans under the MPF Original product and mortgage loans insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA) under the MPF Government product. (“Mortgage Partnership Finance,” “MPF,” and “MPF Xtra” are registered trademarks of the FHLBank of Chicago.) In addition, the Bank may facilitate the purchase of conforming fixed rate mortgage loans from members for concurrent sale to Fannie Mae under the MPF Xtra® product; of jumbo fixed rate mortgage loans for concurrent sale to Redwood Residential Acquisition Corporation, a subsidiary of Redwood Trust, Inc., a real estate investment trust, under the MPF Direct product; and of government-insured or government-guaranteed mortgage loans that will be packaged into securities backed by the mortgage loans and guaranteed by Ginnie Mae under the MPF Government MBS product. When members sell mortgage loans under the MPF Xtra, MPF Direct, and MPF Government MBS products, the loans are sold to a third-party investor and are not recorded on the Bank’s Statements of Condition.

From May 2002 through October 2006, the Bank purchased conventional conforming fixed rate mortgage loans from its participating financial institutions under the MPF Original and MPF Plus products. Participating members originated or purchased the mortgage loans, credit-enhanced them and sold them to the Bank, and generally retained the servicing of the loans.

The following table presents information as of June 30, 2018, and December 31, 2017, on mortgage loans, all of which are secured by one- to four-unit residential properties and single-unit second homes.

24

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	June 30, 2018			December 31, 2017
Fixed rate medium-term mortgage loans	$	20		$	32
Fixed rate long-term mortgage loans	2,618			1,973
Subtotal	2,638			2,005
Unamortized premiums	95			76
Unamortized discounts	(5		)	(5		)
Mortgage loans held for portfolio	2,728			2,076
Less: Allowance for credit losses	—			—
Total mortgage loans held for portfolio, net	$	2,728		$	2,076

Medium-term loans have original contractual terms of 15 years or less, and long-term loans have contractual terms of more than 15 years.

For information related to the Bank’s credit risk on mortgage loans and allowance methodology for credit losses, see Note 9 – Allowance for Credit Losses.

Note 9 — Allowance for Credit Losses

The Bank has established an allowance methodology for each of its portfolio segments: advances, letters of credit, and other extensions of credit, collectively referred to as “credit products,” mortgage loans held for portfolio, term securities purchased under agreements to resell, and term Federal funds sold. For more information on these portfolio segments, see “Item 8. Financial Statements and Supplementary Data – Note 10 – Allowance for Credit Losses” in the Bank’s 2017 Form 10-K.

Credit Products. The Bank manages its credit exposure related to credit products through an integrated approach that generally provides for a credit limit to be established for each borrower, includes an ongoing review of each borrower’s financial condition, and is coupled with conservative collateral and lending policies to limit the risk of loss while taking into account borrowers’ needs for a reliable funding source. At June 30, 2018, and December 31, 2017, none of the Bank’s credit products were past due, on nonaccrual status, or considered impaired. There were no troubled debt restructurings related to credit products during the six months ended June 30, 2018, or during 2017.

Based on the collateral pledged as security for advances, the Bank’s credit analyses of borrowers’ financial condition, and the Bank’s credit extension and collateral policies as of June 30, 2018, the Bank expects to collect all amounts due according to the contractual terms. Therefore, no allowance for losses on credit products was deemed necessary by the Bank. The Bank has never experienced any credit losses on its credit products.

Mortgage Loans Held for Portfolio. The following table presents information on delinquent mortgage loans as of June 30, 2018, and December 31, 2017.

25

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	June 30, 2018			December 31, 2017
	Recorded Investment(1)			Recorded Investment(1)
30 – 59 days delinquent	$	7		$	8
60 – 89 days delinquent	2			2
90 days or more delinquent	11			12
Total past due	20			22
Total current loans	2,723			2,065
Total mortgage loans	$	2,743		$	2,087
In process of foreclosure, included above(2)	$	3		$	3
Nonaccrual loans	$	11		$	12
Loans past due 90 days or more and still accruing interest	$	—		$	—
Serious delinquencies as a percentage of total mortgage loans outstanding(3)	0.41		%	0.59		%

(1) The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

(2) Includes loans for which the servicer has reported a decision to foreclose or to pursue a similar alternative, such as deed-in-lieu. Loans in process of foreclosure are included in past due or current loans depending on their delinquency status.

(3) Represents loans that are 90 days or more past due or in the process of foreclosure as a percentage of the recorded investment of total mortgage loans outstanding.

The amounts of charge-offs and recoveries of allowance for credit losses on the mortgage loan portfolio were de minimis during the three and six months ended June 30, 2018 and 2017.

The recorded investment by impairment methodology for individually and collectively evaluated impaired loans is as follows:

(In millions)	June 30, 2018		December 31, 2017
Recorded investment, end of the period:
Individually evaluated for impairment	$	9	$	9
Collectively evaluated for impairment	2,734		2,078
Total recorded investment	$	2,743	$	2,087

The allowance for credit losses for loans collectively evaluated for impairment totaled de minimis amounts as of June 30, 2018, and December 31, 2017. The Bank had no allowance for credit losses for loans individually evaluated for impairment as of June 30, 2018, and a de minimis allowance for credit losses for loans individually evaluated for impairment as of December 31, 2017.

The recorded investment, unpaid principal balance, and related allowance of impaired loans individually evaluated for impairment are as follows:

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance	$	9	$	9	$	—	$	9	$	9	$	—
With an allowance	—		—		—		—		—		—
Total	$	9	$	9	$	—	$	9	$	9	$	—

The Bank and any participating financial institution share in the credit risk of the loans sold by that institution as specified in a master agreement. Loans purchased under the MPF Program generally had a credit risk exposure at the time of purchase that, as determined by the MPF Program methodology, would be expected from an equivalent investment rated AA if purchased prior to April 2017, or rated BBB if purchased since April 2017, taking i

26

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

nto consideration the credit risk sharing structure mandated by the Finance Agency’s acquired member assets (AMA) regulation. The MPF Program structures potential credit losses on conventional MPF loans into layers with respect to each pool of loans purchased by the Bank under a single master commitment, as follows:

1. The first layer of protection against loss is the liquidation value of the real property securing the loan.

2. The next layer of protection comes from the primary mortgage insurance that is required for loans with a loan-to-value ratio greater than 80%, if still in place.

3. Losses that exceed the liquidation value of the real property and any primary mortgage insurance, up to an agreed-upon amount called the first loss account for each master commitment, are incurred by the Bank.

4. Losses in excess of the first loss account for each master commitment, up to an agreed-upon amount called the credit enhancement amount, are covered by the participating financial institution’s credit enhancement obligation at the time losses are incurred.

5. Losses in excess of the first loss account and the participating financial institution’s remaining credit enhancement for the master commitment, if any, are incurred by the Bank.

Allowance for Credit Losses on MPF Loans – The Bank evaluates the allowance for credit losses on MPF mortgage loans based on two components. The first component applies to each individual loan that is specifically identified as impaired. The Bank evaluates the exposure on these loans by considering the first layer of loss protection (the liquidation value of the real property securing the loan) and the availability and collectability of credit enhancements under the terms of each master commitment and records a provision for credit losses. For this component, the Bank had no allowance for credit losses for MPF Original and MPF Plus loans as of June 30, 2018, and a de minimis allowance for credit losses for MPF Original and MPF Plus loans as of December 31, 2017.

The second component applies to loans that are not specifically identified as impaired and is based on the Bank’s estimate of probable credit losses on those loans as of the financial statement date. The Bank evaluates the credit loss exposure on a loan pool basis considering various observable data, such as delinquency statistics, past performance, current performance, loan portfolio characteristics, collateral valuations, industry data, and prevailing economic conditions. The Bank also considers the availability and collectability of credit enhancements from participating financial institutions or from mortgage insurers under the terms of each master commitment. For this component, the Bank established an allowance for credit losses for MPF Original and MPF Plus loans totaling de minimis amounts as of June 30, 2018, and December 31, 2017.

Troubled Debt Restructurings – Troubled debt restructuring (TDR) is considered to have occurred when a concession is granted to the debtor for economic or legal reasons related to the debtor’s financial difficulties and that concession would not have been considered otherwise. An MPF loan considered a TDR is individually evaluated for impairment when determining its related allowance for credit losses. Credit loss is measured by factoring in expected cash flow shortfalls incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates, if applicable. The recorded investment of the Bank's nonperforming MPF loans classified as TDRs totaled $2 as of June 30, 2018, and $3 as of December 31, 2017.

Term Federal Funds Sold. The Bank invests in Federal funds sold with counterparties that are considered by the Bank to be of investment quality, and these investments are evaluated for purposes of an allowance for credit losses only if the investment is not paid when due. All investments in Federal funds sold as of June 30, 2018, and December 31, 2017, were repaid or are expected to be repaid according to the contractual terms.

Note 10 — Deposits

The Bank maintains demand deposit accounts that are directly related to the extension of credit to members and offers short-term deposit programs to members and qualifying nonmembers. In addition, a member that services mortgage loans may deposit in the Bank funds collected in connection with the mortgage loans, pe

27

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

nding disbursement of these funds to the owners of the mortgage loans. The Bank classifies these types of deposits as non-interest-bearing deposits.

Deposits as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018		December 31, 2017
Interest-bearing deposits:
Demand and overnight	$	354	$	263
Term	2		—
Total interest-bearing deposits	356		263
Non-interest-bearing deposits	23		18
Total	$	379	$	281

Interest Rate Payment Terms. Deposits classified as demand, overnight, and other pay interest based on a daily interest rate. Term deposits pay interest based on a fixed rate determined at the issuance of the deposit. Interest rate payment terms for deposits at June 30, 2018, and December 31, 2017, are detailed in the following table:

	June 30, 2018				December 31, 2017
	Amount Outstanding		Weighted Average Interest Rate		Amount Outstanding		Weighted Average Interest Rate
Interest-bearing deposits:
Adjustable rate	$	354	1.60	%	$	263	1.10	%
Fixed rate	2		1.60		—		—
Total interest-bearing deposits	356				263
Non-interest-bearing deposits	23				18
Total	$	379			$	281

The aggregate amount of time deposits with a denomination of $250 thousand or more was $2 at June 30, 2018. There were no time deposits at December 31, 2017. These time deposits are scheduled to mature within three months.

Note 11 — Consolidated Obligations

Consolidated obligations, consisting of consolidated obligation bonds and discount notes, are jointly issued by the FHLBanks through the Office of Finance, which serves as the FHLBanks’ agent. As provided by the FHLBank Act or by regulations governing the operations of the FHLBanks, all FHLBanks have joint and several liability for all FHLBank consolidated obligations. For a discussion of the joint and several liability regulation, see “Item 8. Financial Statements and Supplementary Data – Note 20 – Commitments and Contingencies” in the Bank’s 2017 Form 10-K. In connection with each issuance of consolidated obligations, each FHLBank specifies the type, term, and amount of debt it requests to have issued on its behalf. The Office of Finance tracks the amount of debt issued on behalf of each FHLBank. In addition, the Bank separately tracks and records as a liability its specific portion of the consolidated obligations issued and is the primary obligor for that portion of the consolidated obligations issued. The Finance Agency and the U.S. Secretary of the Treasury have oversight over the issuance of FHLBank debt through the Office of Finance.

Redemption Terms. The following is a summary of the Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017.

28

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	58,923		1.90	%	$	69,734		1.33	%
After 1 year through 2 years	6,226			1.88		6,461			1.42
After 2 years through 3 years	3,791			1.82		2,785			1.74
After 3 years through 4 years	1,165			1.93		2,058			1.78
After 4 years through 5 years	2,029			2.41		1,994			2.15
After 5 years	2,031			2.94		2,076			2.80
Total par value	74,165			1.94	%	85,108			1.41	%
Unamortized premiums	5					9
Unamortized discounts	(11		)			(11		)
Valuation adjustments for hedging activities	(84		)			(37		)
Fair value option valuation adjustments	(14		)			(6		)
Total	$	74,061				$	85,063

The Bank’s participation in consolidated obligation bonds outstanding includes callable bonds of $10,645 at June 30, 2018, and $9,612 at December 31, 2017. When a callable bond for which the Bank is the primary obligor is issued, the Bank may simultaneously enter into an interest rate swap (in which the Bank pays a variable rate and receives a fixed rate) with a call feature that mirrors the call option embedded in the bond (a sold callable swap). The Bank had notional amounts of interest rate exchange agreements hedging callable bonds of $7,141 at June 30, 2018, and $6,406 at December 31, 2017. The combined sold callable swaps and callable bonds enable the Bank to meet its funding needs at costs not otherwise directly attainable solely through the issuance of non-callable debt, while effectively converting the Bank’s net payment to an adjustable rate.

The Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017, was as follows:  

	June 30, 2018		December 31, 2017
Par value of consolidated obligation bonds:
Non-callable	$	63,520	$	75,496
Callable	10,645		9,612
Total par value	$	74,165	$	85,108

The following is a summary of the Bank’s participation in consolidated obligation bonds outstanding at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date.

Earlier of Contractual Maturity or Next Call Date	June 30, 2018		December 31, 2017
Within 1 year	$	68,154	$	78,606
After 1 year through 2 years	5,125		5,326
After 2 years through 3 years	730		935
After 3 years through 4 years	5		85
After 4 years through 5 years	90		55
After 5 years	61		101
Total par value	$	74,165	$	85,108

29

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Consolidated obligation discount notes are consolidated obligations issued to raise short-term funds. These notes are issued at less than their face value and redeemed at par value when they mature. The Bank’s participation in consolidated obligation discount notes, all of which are due within one year, was as follows:

	June 30, 2018					December 31, 2017
	Amount Outstanding			Weighted Average Interest Rate (1)		Amount Outstanding			Weighted Average Interest Rate (1)
Par value	$	24,570		1.86	%	$	30,494		1.24	%
Unamortized discounts	(51		)			(54		)
Total	$	24,519				$	30,440

(1) Represents yield to maturity excluding concession fees.

Interest Rate Payment Terms. Interest rate payment terms for consolidated obligations at June 30, 2018, and December 31, 2017, are detailed in the following table. For information on the general terms and types of consolidated obligations outstanding, see “Item 8. Financial Statements and Supplementary Data – Note 12 – Consolidated Obligations” in the Bank’s 2017 Form 10-K.

	June 30, 2018		December 31, 2017
Par value of consolidated obligations:
Bonds:
Fixed rate	$	16,348	$	17,967
Adjustable rate	56,489		66,276
Step-up	953		565
Step-down	275		200
Range bonds	100		100
Total bonds, par value	74,165		85,108
Discount notes, par value	24,570		30,494
Total consolidated obligations, par value	$	98,735	$	115,602

The Bank did not have any bonds with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative at June 30, 2018, or December 31, 2017. The Bank has generally elected to account for certain bonds with embedded features under the fair value option, and these bonds are carried at fair value on the Statements of Condition. For more information, see Note 16 – Fair Value.

30

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Note 12 — Accumulated Other Comprehensive Income/(Loss)

The following table summarizes the changes in AOCI for the three months ended June 30, 2018 and 2017:

	Net Non-Credit-Related OTTI Loss on AFS Securities			Net Non-Credit-Related OTTI Loss on HTM Securities			Pension and Postretirement Benefits			Total AOCI
Balance, March 31, 2017	$	167		$	(8	)	$	(16	)	$	143
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(3		)	—						(3		)
Net change in fair value	84									84
Accretion of non-credit-related OTTI loss				1						1
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	2			—						2
Net current period other comprehensive income/(loss)	83			1			—			84
Balance, June 30, 2017	$	250		$	(7	)	$	(16	)	$	227
Balance, March 31, 2018	$	352		$	(5	)	$	(12	)	$	335
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(9		)	—						(9		)
Net change in fair value	3									3
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	1			—						1
Net current period other comprehensive income/(loss)	(5		)	—			—			(5		)
Balance, June 30, 2018	$	347		$	(5	)	$	(12	)	$	330

31

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

The following table summarizes the changes in AOCI for the six months ended June 30, 2018 and 2017:

	Net Non-Credit-Related OTTI Loss on AFS Securities			Net Non-Credit-Related OTTI Loss on HTM Securities			Pension and Postretirement Benefits			Total AOCI
Balance, December 31, 2016	$	136		$	(9	)	$	(16	)	$	111
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(3		)	—						(3		)
Net change in fair value	113									113
Accretion of non-credit-related OTTI loss				2						2
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	4			—						4
Net current period other comprehensive income/(loss)	114			2			—			116
Balance, June 30, 2017	$	250		$	(7	)	$	(16	)	$	227
Balance, December 31, 2017	$	337		$	(6	)	$	(13	)	$	318
Other comprehensive income/(loss) before reclassifications:
Net change in pension and postretirement benefits							1			1
Non-credit-related OTTI loss	(11		)	—						(11		)
Net change in fair value	20									20
Accretion of non-credit-related OTTI loss				1						1
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	1			—						1
Net current period other comprehensive income/(loss)	10			1			1			12
Balance, June 30, 2018	$	347		$	(5	)	$	(12	)	$	330

Note 13 — Capital

Capital Requirements. Under the Housing Act, the Director of the Finance Agency is responsible for setting the risk-based capital standards for the FHLBanks. The FHLBank Act and regulations governing the operations of the FHLBanks require that the Bank’s minimum capital stock requirement for shareholders must be sufficient to enable the Bank to meet its regulatory requirements for total capital, leverage capital, and risk-based capital. The Bank must maintain: (i) total regulatory capital in an amount equal to at least 4% of its total assets, (ii) leverage capital in an amount equal to at least 5% of its total assets, and (iii) permanent capital in an amount that is greater than or equal to its risk-based capital requirement. Because the Bank issues only Class B stock, regulatory capital and permanent capital for the Bank are both composed of retained earnings and Class B stock, including mandatorily redeemable capital stock (which is classified as a liability for financial reporting purposes). Regulatory capital and permanent capital do not include AOCI. Leverage capital is defined as the sum of permanent capital, weighted by a 1.5 multiplier, plus non-permanent capital.

The risk-based capital requirement is equal to the sum of the Bank’s credit risk, market risk, and operations risk capital requirements, all of which are calculated in accordance with the rules and regulations of the Finance Agency. The Finance Agency may require an FHLBank to maintain a greater amount of permanent capital than is required by the risk-based capital requirement as defined.

32

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

As of June 30, 2018, and December 31, 2017, the Bank was in compliance with these capital rules and requirements as shown in the following table.

	June 30, 2018						December 31, 2017
	Required			Actual			Required			Actual
Risk-based capital	$	2,022		$	6,424		$	2,023		$	6,797
Total regulatory capital	$	4,248		$	6,424		$	4,935		$	6,797
Total regulatory capital ratio	4.00		%	6.05		%	4.00		%	5.51		%
Leverage capital	$	5,310		$	9,636		$	6,169		$	10,195
Leverage ratio	5.00		%	9.07		%	5.00		%	8.26		%

Mandatorily Redeemable Capital Stock. The Bank had mandatorily redeemable capital stock totaling $255 outstanding to six institutions at June 30, 2018, and $309 outstanding to seven institutions at December 31, 2017. The change in mandatorily redeemable capital stock for the three and six months ended June 30, 2018 and 2017, was as follows:

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at the beginning of the period	$	309		$	403		$	309		$	457
Reclassified from/(to) capital during the period	2			2			2			2
Redemption of mandatorily redeemable capital stock	—			—			—			(54		)
Repurchase of excess mandatorily redeemable capital stock	(56		)	(1		)	(56		)	(1		)
Balance at the end of the period	$	255		$	404		$	255		$	404

Cash dividends on mandatorily redeemable capital stock were recorded as interest expense in the amount of $5 and $7 for the three months ended June 30, 2018 and 2017, respectively, and in the amount of $11 and $18 for the six months ended June 30, 2018 and 2017, respectively.

The Bank’s mandatorily redeemable capital stock is discussed more fully in “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

The following table presents mandatorily redeemable capital stock amounts by contractual redemption period at June 30, 2018, and December 31, 2017.

Contractual Redemption Period	June 30, 2018		December 31, 2017
After 1 year through 2 years	$	1	$	—
After 2 years through 3 years	251		306
Past contractual redemption date because of remaining activity(1)	3		3
Total	$	255	$	309

(1) Represents mandatorily redeemable capital stock that is past the end of the contractual redemption period because of outstanding activity.

Excess Stock Repurchase, Retained Earnings, and Dividend Framework. By Finance Agency regulation, dividends may be paid only out of current net earnings or previously retained earnings. As required by the Finance Agency, the Bank’s Excess Stock Repurchase, Retained Earnings, and Dividend Framework (Framework) summarizes the Bank’s capital management principles and objectives, as well as its policies and practices, with respect to retained earnings, dividend payments, and the repurchase of excess capital stock. The Bank may be restricted from paying dividends if the Bank is not in compliance with any of its minimum capital requirements or if payment would cause the Bank to fail to meet any of its minimum capital requirements. In addition, the Bank may not pay dividends if any principal or interest due on any consolidated obligations has not been paid in full or is not

33

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

expected to be paid in full, or, under certain circumstances, if the Bank fails to satisfy certain liquidity requirements under applicable Finance Agency regulations.

The Bank’s Board of Directors reviews the Framework at least annually and may amend the Framework from time to time. In January 2017, the Framework was amended and approved by the Bank’s Board of Directors to include a dividend philosophy to endeavor to pay a quarterly dividend at an annualized rate between 5% and 7%, which was considered by the Bank’s Board of Directors beginning with the Bank’s second quarter 2017 dividend declaration. The decision to declare any dividend and the dividend rate are at the discretion of the Bank’s Board of Directors, which may choose to follow the dividend philosophy as guidance in the dividend declaration.

The Bank’s Risk Management Policy limits the payment of dividends if the ratio of the Bank’s estimated market value of total capital to par value of capital stock falls below certain levels. If this ratio at the end of any quarter is less than 100% but greater than or equal to 70%, any dividend would be limited to an annualized rate no greater than the daily average of the three-month LIBOR for the applicable quarter (subject to certain conditions), and if this ratio is less than 70%, the Bank would be restricted from paying a dividend. The ratio of the Bank’s estimated market value of total capital to par value of capital stock was 224% as of June 30, 2018.

In addition, the Bank monitors the condition of its PLRMBS portfolio, the ratio of the Bank’s estimated market value of total capital to par value of capital stock, its overall financial performance and retained earnings, developments in the mortgage and credit markets, and other relevant information as the basis for determining the payment of dividends and the repurchase of excess capital stock each quarter.

Retained Earnings – The following tables summarize the activity related to retained earnings for the three and six months ended June 30, 2018 and 2017:

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, March 31, 2017	$	850		$	20	$	1,750	$	530	$	2,300	$	3,150
Net income	63			1		—		16		17		80
Cash dividends on capital stock	(41		)									(41		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, March 31, 2018	$	2,681		$	—	$	—	$	592	$	592	$	3,273
Net income	84			—		—		20		20		104
Cash dividends on capital stock	(58		)									(58		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

34

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, December 31, 2016	$	888		$	18	$	1,650	$	500	$	2,168	$	3,056
Net income	79			3		100		46		149		228
Cash dividends on capital stock	(95		)									(95		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, December 31, 2017	$	2,670		$	—	$	—	$	575	$	575	$	3,245
Net income	148			—		—		37		37		185
Cash dividends on capital stock	(111		)									(111		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

The Bank’s Framework assesses the level and adequacy of retained earnings and establishes amounts to be retained in restricted retained earnings, which are not made available in the current dividend period, and maintains an amount of total retained earnings at least equal to its required retained earnings as described in the Framework. Prior to July 2017, the Bank’s Framework had three categories of restricted retained earnings: Valuation Adjustments, Other (which represented a targeted amount), and the Joint Capital Enhancement (JCE Agreement). Under the Framework, the Bank’s required amount of restricted retained earnings was determined using the Bank’s retained earnings methodology. As determined using the Bank’s methodology, from July 2015 to January 2017, the Bank’s restricted retained earnings requirement was $2,000, and from January 2017 to July 2017, the Bank’s restricted retained earnings requirement was $2,300.

In July 2017, the Bank’s Board of Directors approved the transfer of all amounts classified as restricted retained earnings, other than the amounts related to the JCE Agreement, to unrestricted retained earnings. As a conforming change related to the transfer, the Bank’s Board of Directors amended the Framework to eliminate two of the categories of restricted retained earnings (Valuation Adjustments and Other) and approved revisions to the Bank’s retained earnings methodology to provide for a required level of total retained earnings of $2,300 for loss protection, capital compliance, and business growth. In January 2018, the methodology was further revised to provide a required level of total retained earnings of $2,500. The Bank satisfies its retained earnings requirement with both restricted retained earnings (i.e., amounts related to the JCE Agreement) and unrestricted retained earnings.

For more information on restricted retained earnings and the Bank’s Framework, see “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

Dividend Payments – Finance Agency rules state that FHLBanks may declare and pay dividends only from previously retained earnings or current net earnings, and may not declare or pay dividends based on projected or anticipated earnings. There is no requirement that the Board of Directors declare and pay any dividend. A decision by the Board of Directors to declare or not declare a dividend is a discretionary matter and is subject to the requirements and restrictions of the FHLBank Act and applicable requirements under the regulations governing the operations of the FHLBanks.

In addition, Finance Agency rules do not permit the Bank to pay dividends in the form of capital stock if its excess capital stock exceeds 1% of its total assets. Excess capital stock is defined as the aggregate of the capital stock held by each shareholder in excess of its minimum capital stock requirement, as established by the Bank’s capital plan. As of June 30, 2018, the Bank’s excess capital stock totaled $152, or 0.14% of total assets.

In the second quarter of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $63, including $58 in dividends on capital stock and $5 in dividends on mandatorily redeemable capital stock. In the second quarter of

35

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

2017, the Bank paid dividends at an annualized rate of 7.00%, totaling $48, including $41 in dividends on capital stock and $7 in dividends on mandatorily redeemable capital stock.

In the first six months of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $122, including $111 in dividends on capital stock and $11 in dividends on mandatorily redeemable capital stock. In the first six months of 2017, the Bank paid dividends at an annualized rate of 8.04%, totaling $113, including $95 in dividends on capital stock and $18 in dividends on mandatorily redeemable capital stock.

For the periods referenced above, the Bank paid dividends in cash. Dividends on capital stock are recognized as dividends on the Statements of Capital Accounts, and dividends on mandatorily redeemable capital stock are recognized as interest expense on the Statements of Income.

On July 26, 2018, the Bank’s Board of Directors declared a cash dividend on the capital stock outstanding during the second quarter of 2018 at an annualized rate of 7.00%, totaling $56, including $51 in dividends on capital stock and $5 in dividends on mandatorily redeemable capital stock. The Bank recorded the dividend on July 26, 2018. The Bank expects to pay the dividend on August 13, 2018. Dividends on mandatorily redeemable capital stock will be recognized as interest expense in the third quarter of 2018.

Excess Capital Stock – The Bank may repurchase some or all of a shareholder’s excess capital stock, including any excess mandatorily redeemable capital stock, at the Bank’s discretion, subject to certain statutory and regulatory requirements. The Bank must give the shareholder 15 days’ written notice; however, the shareholder may waive this notice period. The Bank may also repurchase all of a member’s excess capital stock at a member’s request, at the Bank’s discretion, subject to certain statutory and regulatory requirements. A shareholder’s excess capital stock is defined as any capital stock holdings in excess of the shareholder’s minimum capital stock requirement, as established by the Bank’s capital plan. The Bank repurchased $700 and $60 in excess capital stock during the second quarter of 2018 and 2017, respectively, and $1,128 and $233 in excess capital stock during the first six months of 2018 and 2017, respectively.

The Bank is required to redeem any mandatorily redeemable capital stock that is in excess of a former member’s minimum stock requirement on or after the expiration of the five-year redemption date. During the second quarter of 2018 and 2017, the Bank redeemed de minimis amounts in mandatorily redeemable capital stock, for which the five-year redemption period had expired, at its $100 par value. The stock was redeemed on the scheduled redemption dates or, for stock that was not excess stock on its scheduled redemption date because of outstanding activity with the Bank, on the first available repurchase date after the stock was no longer required to support outstanding activity with the Bank.

On April 9, 2018, the Bank’s Board of Directors revised the Framework to change the Bank’s practice of repurchasing the surplus capital stock of all members and the excess capital stock of all former members from a quarterly schedule to a daily schedule. Surplus capital stock is defined as any stock holdings in excess of 115% of a member’s minimum stock requirement. Effective April 24, 2018, the Bank began calculating the amount of stock to be repurchased each business day based on the shareholder’s capital stock outstanding after all stock transactions are completed for the day, ensuring that each member and former member will continue to meet its minimum capital stock requirement after the repurchase. In accordance with the revised Framework, the Bank repurchased $363 of excess capital stock on April 24, 2018. The Bank may change this practice at any time. All repurchases of capital stock are at the Bank’s discretion, subject to certain statutory and regulatory requirements and to the Bank’s Risk Management Policy, Capital Plan, and the Framework.

Excess capital stock totaled $152 and $493 as of June 30, 2018, and December 31, 2017, respectively.

For more information on excess capital stock, see “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

36

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Concentration. The following table presents the concentration in capital stock held by institutions whose capital stock ownership represented 10% or more of the Bank’s outstanding capital stock, including mandatorily redeemable capital stock, as of June 30, 2018, or December 31, 2017.

	June 30, 2018				December 31, 2017
Name of Institution	Capital Stock Outstanding		Percentage of Total Capital Stock Outstanding		Capital Stock Outstanding		Percentage of Total Capital Stock Outstanding
MUFG Union Bank	$	367	12	%	$	205	6	%
Charles Schwab Bank	17		1		405		11
Subtotal	384		13		610		17
Others	2,721		87		2,942		83
Total	$	3,105	100	%	$	3,552	100	%

Note 14 — Segment Information

The Bank uses an analysis of financial results based on the financial components and adjusted net interest income of two operating segments, the advances-related business and the mortgage-related business, as well as other financial information, to review and assess financial performance and determine financial management strategies related to the operations of these two business segments. For purposes of segment reporting, adjusted net interest income includes income and expense associated with net settlements from economic hedges that are recorded in “Net gain/(loss) on derivatives and hedging activities” in other income and excludes interest expense that is recorded in “Mandatorily redeemable capital stock.” Other key financial information, such as any credit-related OTTI losses on the Bank’s PLRMBS, other expenses, and assessments, is not included in the segment reporting analysis, but is incorporated into the Bank’s overall assessment of financial performance.

For more information on these operating segments, see “Item 8. Financial Statements and Supplementary Data – Note 17 – Segment Information” in the Bank’s 2017 Form 10-K.

The following table presents the Bank’s adjusted net interest income by operating segment and reconciles total adjusted net interest income to income before the AHP assessment for the three and six months ended June 30, 2018 and 2017.

	Advances- Related Business		Mortgage- Related Business(1)		Adjusted Net Interest Income		Amortization of Basis Adjustments(2)			Income/(Expense) on Economic Hedges(3)			Interest Expense on Mandatorily Redeemable Capital Stock(4)		Net Interest Income After Mortgage Loan Loss Provision		Other Income/ (Loss)			Other Expense		Income Before AHP Assessment
Three months ended:
June 30, 2018	$	79	$	73	$	152	$	—		$	(7	)	$	5	$	154	$	5		$	43	$	116
June 30, 2017	57		81		138		—			(13		)	7		144		(16		)	39		89
Six months ended:
June 30, 2018	$	157	$	148	$	305	$	(1	)	$	(7	)	$	11	$	302	$	(3	)	$	92	$	207
June 30, 2017	105		164		269		(2		)	(25		)	18		278		96			119		255

(1) The mortgage-related business includes total accretion or amortization associated with other-than-temporarily impaired PLRMBS, which are recognized in interest income, totaled $20 and $23 for the three months ended June 30, 2018 and 2017; and totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively. The mortgage-related business does not include credit-related OTTI losses of $5 and $6 for the three months ended June 30, 2018 and 2017, and $6 and $9 for the six months ended June 30, 2018 and 2017, respectively.

(2) Represents amortization of amounts deferred for adjusted net interest income purposes only.

(3) The Bank includes income and expense associated with net settlements from economic hedges in adjusted net interest income in its analysis of financial performance for its two operating segments. For financial reporting purposes, the Bank does not include these amounts in net interest income in the Statements of Income, but instead records them in other income in “Net gain/(loss) on derivatives and hedging activities.”

(4) The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments.

37

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

The following table presents total assets by operating segment at June 30, 2018, and December 31, 2017.

	Advances- Related Business		Mortgage- Related Business		Total Assets
June 30, 2018	$	86,849	$	19,359	$	106,208
December 31, 2017	103,426		19,959		123,385

Note 15 — Derivatives and Hedging Activities

General. The Bank may enter into interest rate swaps (including callable, putable, and basis swaps); and cap and floor agreements (collectively, interest rate exchange agreements or derivatives). Most of the Bank’s interest rate exchange agreements are executed in conjunction with the origination of advances or the issuance of consolidated obligation bonds to create variable rate structures. The interest rate exchange agreements are generally executed at the same time the advances and bonds are transacted and generally have the same maturity dates as the related advances and bonds. The Bank transacts most of its derivatives with large banks and major broker-dealers. Some of these banks and broker-dealers or their affiliates buy, sell, and distribute consolidated obligations. Derivatives may be either uncleared or cleared. In an uncleared derivative transaction, the Bank’s counterparty is the executing bank or broker-dealer. In a cleared derivative transaction, the Bank may execute the transaction either directly with the executing bank or broker-dealer or on a swap execution facility, but in either case, the Bank’s counterparty is a derivatives clearing organization or clearinghouse once the derivative transaction has been accepted for clearing. The Bank is not a derivatives dealer and does not trade derivatives for short-term profit.

Additional uses of interest rate exchange agreements include: (i) offsetting embedded features in assets and liabilities, (ii) hedging anticipated issuance of debt, (iii) matching against consolidated obligation discount notes or bonds to create the equivalent of callable or non-callable fixed rate debt, (iv) modifying the repricing frequency of assets and liabilities, (v) matching against certain advances and consolidated obligations for which the Bank elected the fair value option, and (vi) exactly offsetting other derivatives cleared at a derivatives clearing organization. The Bank’s use of interest rate exchange agreements results in one of the following classifications: (i) a fair value hedge of an underlying financial instrument or (ii) an economic hedge of assets, liabilities, or other derivatives.

The Bank primarily uses the following derivative instruments:

Interest Rate Swaps – An interest rate swap is an agreement between two entities to exchange cash flows in the future. The agreement sets the dates on which the cash flows will be paid and the manner in which the cash flows will be calculated. One of the simplest forms of an interest rate swap involves the promise by one party to pay cash flows equivalent to the interest on a notional principal amount at a predetermined fixed rate for a given period of time. In return for this promise, the party receives cash flows equivalent to the interest on the same notional principal amount at a variable rate for the same period of time. The variable rate received or paid by the Bank in most interest rate exchange agreements is either indexed to LIBOR or to the overnight index swap rate.

Interest Rate Caps and Floors – In a cap agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate rises above a certain threshold (or cap) price. In a floor agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate falls below a certain threshold (or floor) price. Caps and floors may be used in conjunction with assets or liabilities. In general, caps and floors are designed as protection against the interest rate on a variable rate asset or liability rising above or falling below a certain level.

Hedging Activities. The Bank documents at inception all relationships between derivatives designated as hedging instruments and hedged items, its risk management objectives and strategies for undertaking various hedge transactions, and its method of assessing hedge effectiveness. Derivatives designated as fair value hedges may be transacted to hedge: (i) assets and liabilities on the Statement of Condition, (ii) firm commitments, or (iii) forecasted transactions. The Bank also formally assesses (both at hedge inception and on an ongoing basis) whether the hedging

38

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

derivatives have been effective in offsetting changes in the fair value of hedged items attributable to the hedged risk and whether those derivatives may be expected to remain effective hedges in future periods. The Bank typically uses regression analyses or other statistical analyses to assess the effectiveness of its hedges. When it is determined that a derivative has not been or is not expected to be effective as a hedge, the Bank discontinues hedge accounting prospectively.

The Bank discontinues hedge accounting prospectively when: (i) it determines that the derivative is no longer effective in offsetting changes in the fair value of a hedged item (including hedged items such as firm commitments or forecasted transactions); (ii) the derivative and/or the hedged item expires or is sold, terminated, or exercised; (iii) it is no longer probable that the forecasted transaction will occur in the originally expected period; (iv) a hedged firm commitment no longer meets the definition of a firm commitment; (v) it determines that designating the derivative as a hedging instrument is no longer appropriate; or (vi) it decides to use the derivative to offset changes in the fair value of other derivatives or instruments carried at fair value.

The Bank may have the following types of hedged items:

Investments – The Bank may invest in U.S. Treasury and agency obligations, agency MBS, and the taxable portion of highly rated state or local housing finance agency obligations. In the past, the Bank has also invested in PLRMBS rated AAA at the time of acquisition. The interest rate and prepayment risk associated with these investment securities is managed through a combination of debt issuance and derivatives. The Bank may manage prepayment risk and interest rate risk by funding investment securities with consolidated obligations that have call features or by hedging the prepayment risk with a combination of consolidated obligations and callable swaps. The Bank may execute callable swaps in conjunction with the issuance of certain liabilities to create funding that is economically equivalent to fixed rate callable debt. Although these derivatives are economic hedges against prepayment risk and are designated to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment. Investment securities may be classified as trading, AFS, or HTM.

The Bank may also manage the risk arising from changing market prices or cash flows of investment securities classified as trading by entering into interest rate exchange agreements (economic hedges) that offset the changes in fair value or cash flows of the securities. The market value changes of both the trading securities and the associated interest rate exchange agreements are included in other income in the Statements of Income.

Advances – The Bank offers a wide range of advances structures to meet members’ funding needs. These advances may have maturities up to 30 years with fixed or adjustable rates and may include early termination features or options. The Bank may use derivatives to adjust the repricing and options characteristics of advances to more closely match the characteristics of the Bank’s funding liabilities. In general, whenever a member executes a fixed rate advance, fixed rate advance with embedded options, or a variable rate advance with embedded options, the Bank will simultaneously execute an interest rate exchange agreement with terms that offset the terms and any embedded options in the advance. The combination of the advance and the interest rate exchange agreement effectively creates a variable rate asset. Fixed rate advances without options that are offset with an interest rate exchange agreement are generally treated as fair value hedges. Advances with embedded options are recorded using the fair value option and are economically hedged using interest rate exchange agreements.

Mortgage Loans – The Bank’s investment portfolio includes fixed rate mortgage loans. The prepayment options embedded in mortgage loans can result in extensions or contractions in the expected repayment of these investments, depending on changes in estimated prepayment speeds. The Bank manages the interest rate risk and prepayment risk associated with fixed rate mortgage loans through a combination of debt issuance and derivatives. The Bank uses both callable and non-callable debt to achieve cash flow patterns and market value sensitivities for liabilities similar to those expected on the mortgage loans. Net income could be reduced if the Bank replaces prepaid mortgage loans with lower-yielding assets and the Bank’s higher funding costs are not reduced accordingly.

39

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

The Bank executes callable swaps in conjunction with the issuance of certain consolidated obligations to create funding that is economically equivalent to fixed rate callable bonds. Although these derivatives are economic hedges against the prepayment risk of specific loan pools and are referenced to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment.

Consolidated Obligations – Consolidated obligation bonds may be structured to meet the Bank’s or the investors’ needs. Common structures include fixed rate bonds with or without call options and adjustable rate bonds with or without embedded options. In general, when bonds are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that offset the terms and embedded options, if any, of the consolidated obligation bond. This combination of the consolidated obligation bond and the interest rate exchange agreement effectively creates an adjustable rate bond. The cost of this funding combination is generally lower than the cost that would be available through the issuance of an adjustable rate bond alone. These transactions generally receive fair value hedge accounting treatment.

When the Bank issues consolidated obligation discount notes, it may also simultaneously enter into an interest rate exchange agreement to convert the fixed rate discount note to an adjustable rate discount note. This type of hedge is treated as an economic hedge.

In addition, when certain consolidated obligation bonds for which the Bank has elected the fair value option are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that economically offset the terms of the consolidated obligation bond. However, this type of hedge is treated as an economic hedge because these combinations do not meet the requirements for fair value hedge accounting treatment.

Offsetting Derivatives – The Bank enters into derivatives to offset the economic effect of other derivatives that are no longer designated to advances, investments, or consolidated obligations. Offsetting derivatives do not receive hedge accounting treatment and are separately marked to market through earnings. The net result of the accounting for these derivatives does not significantly affect the operating results of the Bank.

The notional amount of an interest rate exchange agreement serves as a factor in determining periodic interest payments or cash flows received and paid. However, the notional amount of derivatives represents neither the actual amounts exchanged nor the overall exposure of the Bank to credit risk and market risk. The risks of derivatives can be measured meaningfully on a portfolio basis by taking into account the counterparties, the types of derivatives, the items being hedged, and any offsets between the derivatives and the items being hedged.

The following table summarizes the notional amount and fair value of derivative instruments, including the effect of netting adjustments and cash collateral as of June 30, 2018, and December 31, 2017. For purposes of this disclosure, the derivative values include the fair value of derivatives and related accrued interest.

40

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	June 30, 2018							December 31, 2017
	Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments:
Interest rate swaps	$	34,853	$	8	$	43		$	24,270	$	92		$	27
Total	34,853		8		43			24,270		92			27
Derivatives not designated as hedging instruments:
Interest rate swaps	39,022		83		74			73,760		81			57
Interest rate caps and floors	1,563		2		—			1,563		1			1
Mortgage delivery commitments	16		—		—			16		—			—
Total	40,601		85		74			75,339		82			58
Total derivatives before netting and collateral adjustments	$	75,454	93		117			$	99,609	174			85
Netting adjustments and cash collateral(1)			48		(115		)			(91		)	(84		)
Total derivative assets and total derivative liabilities			$	141	$	2				$	83		$	1

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

The following table presents the components of net gain/(loss) on derivatives and hedging activities as presented in the Statements of Income for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
	Gain/(Loss)			Gain/(Loss)			Gain/(Loss)			Gain/(Loss)
Derivatives designated as hedging instruments:
Interest rate swaps	$	2		$	(2	)	$	4		$	(2	)
Total net gain/(loss) related to fair value hedge ineffectiveness	2			(2		)	4			(2		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest rate swaps	18			(10		)	42			(8		)
Interest rate caps and floors	(1		)	(3		)	1			(5		)
Net settlements	(7		)	(13		)	(7		)	(25		)
Mortgage delivery commitments	5			9			9			12
Total net gain/(loss) related to derivatives not designated as hedging instruments	15			(17		)	45			(26		)
Other(1)	—			—			(1		)	—
Net gain/(loss) on derivatives and hedging activities	$	17		$	(19	)	$	48		$	(28	)

(1) Consists of price alignment amount on derivatives for which variation margin on cleared derivatives is characterized as a daily settled contract.

The following tables present, by type of hedged item, the gains and losses on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Bank’s net interest income for the three and six months ended June 30, 2018 and 2017.

41

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	Three Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	10		$	(6	)	$	4		$	17		$	(10	)	$	8		$	(2	)	$	(8	)
Consolidated obligation bonds	(6		)	4			(2		)	(8		)	1			(1		)	—			6
Total	$	4		$	(2	)	$	2		$	9		$	(9	)	$	7		$	(2	)	$	(2	)

	Six Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	80		$	(73	)	$	7		$	20		$	4		$	(6	)	$	(2	)	$	(17	)
Consolidated obligation bonds	(50		)	47			(3		)	(7		)	(10		)	10			—			15
Total	$	30		$	(26	)	$	4		$	13		$	(6	)	$	4		$	(2	)	$	(2	)

(1) The net interest on derivatives in fair value hedge relationships is presented in the interest income/expense line item of the respective hedged item.    

Credit Risk – The Bank is subject to credit risk as a result of potential nonperformance by counterparties to the interest rate exchange agreements. All of the Bank’s agreements governing uncleared derivative transactions contain master netting provisions to help mitigate the credit risk exposure to each counterparty. The Bank manages counterparty credit risk through credit analyses and collateral requirements and by following the requirements of the Bank’s risk management policies, credit guidelines, and Finance Agency and other regulations. The Bank also requires credit support agreements on all uncleared derivatives.

For cleared derivatives, the clearinghouse is the Bank’s counterparty. The requirement that the Bank post initial and variation margin through a clearing agent, to the clearinghouse, exposes the Bank to institutional credit risk in the event that the clearing agent or the clearinghouse fails to meet its obligations. The use of cleared derivatives, however, mitigates the Bank’s overall credit risk exposure because a central counterparty is substituted for individual counterparties. Variation margin and initial margin are posted for changes in the value and risk profile of cleared derivatives. The Bank has analyzed the enforceability of offsetting rights applicable to its cleared derivative transactions and determined that the exercise of those offsetting rights by a non-defaulting party under these transactions should be upheld under applicable bankruptcy law and Commodity Futures Trading Commission rules in the event of a clearinghouse or clearing agent insolvency and under applicable clearinghouse rules upon a non-insolvency-based event of default of the clearinghouse or clearing agent. Based on this analysis, the Bank presents a net derivative receivable or payable for all of its transactions through a particular clearing agent with a particular clearinghouse.

Based on the Bank’s credit analyses and the collateral requirements, the Bank does not expect to incur any credit losses on its derivative transactions.

The Bank’s agreements for uncleared derivative transactions contain provisions that link the Bank’s credit rating from Moody’s Investors Service and S&P Global Ratings to various rights and obligations. Certain of these derivative agreements provide that, if the Bank’s long-term debt rating falls below a specified rating (ranging from A3/A- to Baa3/BBB-), the Bank’s counterparty would have the right, but not the obligation, to terminate all of its outstanding derivative transactions with the Bank; the Bank’s agreements with its clearing agents for cleared derivative transactions have similar provisions with respect to the debt rating of FHLBank System consolidated

42

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

bonds. If this occurs, the Bank may choose to enter into replacement hedges, either by transferring the existing transactions to another counterparty or entering into new replacement transactions, based on prevailing market rates. The aggregate fair value of all uncleared derivative instruments with credit risk-related contingent features that were in a net derivative liability position (before cash collateral and related accrued interest) at June 30, 2018, was $58, for which the Bank had posted cash collateral of $56 in the ordinary course of business.

The Bank may present derivative instruments, related cash collateral received or pledged, and associated accrued interest by clearing agent or by counterparty when the netting requirements have been met.

The following table presents separately the fair value of derivative assets and derivative liabilities that have met the netting requirements, including the related collateral received from or pledged to counterparties as of June 30, 2018, and December 31, 2017.

	June 30, 2018							December 31, 2017
	Derivative Instruments Meeting Netting Requirements							Derivative Instruments Meeting Netting Requirements
	Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities		Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities
Derivative Assets
Uncleared	$	89	$	(87	)	$	2	$	35	$	(33	)	$	2
Cleared	4		135			139		139		(58		)	81
Total						$	141						$	83
Derivative Liabilities
Uncleared	$	113	$	(111	)	$	2	$	29	$	(28	)	$	1
Cleared	4		(4		)	—		56		(56		)	—
Total						$	2						$	1

Note 16 — Fair Value

The following fair value amounts have been determined by the Bank using available market information and the Bank’s best judgment of appropriate valuation methods. These estimates are based on pertinent information available to the Bank at June 30, 2018, and December 31, 2017. Although the Bank uses its best judgment in estimating the fair value of these financial instruments, there are inherent limitations in any estimation technique or valuation methodology. For example, because an active secondary market does not exist for a portion of the Bank’s financial instruments, in certain cases fair values cannot be precisely quantified or verified and may change as economic and market factors and evaluation of those factors change. The Bank continues to refine its valuation methodologies as markets and products develop and the pricing for certain products becomes more or less transparent. While the Bank believes that its valuation methodologies are appropriate and consistent with those of other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a materially different estimate of fair value as of the reporting date. U.S. GAAP defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). Therefore, the fair values are not necessarily indicative of the amounts that would be realized in current market transactions, although they do reflect the Bank’s judgment as to how a market participant would estimate the fair values. The fair value summary table does not represent an estimate of the overall market value of the Bank as a going concern, which would take into account future business opportunities and the net profitability of total assets and liabilities.

The following tables present the carrying value, the estimated fair value, and the fair value hierarchy level of the Bank’s financial instruments at June 30, 2018, and December 31, 2017. The Bank records trading securities, AFS

43

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

securities, derivative assets, derivative liabilities, certain advances, certain consolidated obligations, and certain other assets at fair value on a recurring basis, and on occasion certain mortgage loans held for portfolio and certain other assets at fair value on a nonrecurring basis. The Bank records all other financial assets and liabilities at amortized cost. Refer to the following tables for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis.

	June 30, 2018
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	44	$	44	$	44	$	—	$	—	$	—
Interest-bearing deposits	2,035		2,035		2,035		—		—		—
Securities purchased under agreements to resell	4,000		4,000		—		4,000		—		—
Federal funds sold	8,727		8,729		—		8,729		—		—
Trading securities	662		662		—		662		—		—
AFS securities	3,510		3,510		—		—		3,510		—
HTM securities	13,769		13,739		—		12,904		835		—
Advances	70,314		70,363		—		70,363		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,728		2,660		—		2,660		—		—
Accrued interest receivable	161		161		—		161		—		—
Derivative assets, net(1)	141		141		—		93		—		48
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	379		379		—		379		—		—
Consolidated obligations:
Bonds	74,061		73,839		—		73,839		—		—
Discount notes	24,519		24,518		—		24,518		—		—
Total consolidated obligations	98,580		98,357		—		98,357		—		—
Mandatorily redeemable capital stock	255		255		255		—		—		—
Accrued interest payable	131		131		—		131		—		—
Derivative liabilities, net(1)	2		2		—		117		—		(115		)
Other
Standby letters of credit	22		22		—		22		—		—

44

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	December 31, 2017
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	31	$	31	$	31	$	—	$	—	$	—
Interest-bearing deposits	1,115		1,115		1,115		—		—		—
Securities purchased under agreements to resell	11,750		11,750		—		11,750		—		—
Federal funds sold	11,028		11,029		—		11,029		—		—
Trading securities	1,164		1,164		—		1,164		—		—
AFS securities	3,833		3,833		—		—		3,833		—
HTM securities	14,680		14,704		—		13,697		1,007		—
Advances	77,382		77,437		—		77,437		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,076		2,075		—		2,075		—		—
Accrued interest receivable	119		119		—		119		—		—
Derivative assets, net(1)	83		83		—		174		—		(91		)
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	281		281		—		281		—		—
Consolidated obligations:
Bonds	85,063		84,938		—		84,938		—		—
Discount notes	30,440		30,437		—		30,437		—		—
Total consolidated obligations	115,503		115,375		—		115,375		—		—
Mandatorily redeemable capital stock	309		309		309		—		—		—
Accrued interest payable	116		116		—		116		—		—
Derivative liabilities, net(1)	1		1		—		85		—		(84		)
Other
Standby letters of credit	19		19		—		19		—		—

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty.

(2) Represents publicly traded mutual funds held in a grantor trust.

Fair Value Hierarchy. The fair value hierarchy is used to prioritize the fair value methodologies and valuation techniques as well as the inputs to the valuation techniques used to measure fair value for assets and liabilities carried at fair value on the Statements of Condition. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). An entity must disclose the level within the fair value hierarchy in which the measurements are classified for all financial assets and liabilities measured on a recurring or non-recurring basis.

The application of the fair value hierarchy to the Bank’s financial assets and financial liabilities that are carried at fair value either on a recurring or non-recurring basis is as follows:

• Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date.

• Level 2 – Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar

45

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

assets or liabilities in markets that are not active; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and implied volatilities); and (4) inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 – Unobservable inputs for the asset or liability.

A financial instrument’s categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement.

The following assets and liabilities, including those for which the Bank has elected the fair value option, are carried at fair value on the Statements of Condition as of June 30, 2018:

• Trading securities

• AFS securities

• Certain advances

• Derivative assets and liabilities

• Certain consolidated obligation bonds

• Certain other assets

For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. Such reclassifications are reported as transfers in or out as of the beginning of the quarter in which the changes occur. For the periods presented, the Bank did not have any reclassifications for transfers in or out of the fair value hierarchy levels.

Summary of Valuation Methodologies and Primary Inputs.

The valuation methodologies and primary inputs used to develop the measurement of fair value for assets and liabilities that are measured at fair value on a recurring or nonrecurring basis in the Statements of Condition are listed below.

Investment Securities – MBS – To value its MBS, the Bank obtains prices from multiple designated third-party pricing vendors when available. The pricing vendors use various proprietary models to price these securities. The inputs to those models are derived from various sources including, but not limited to: benchmark yields, reported trades, dealer estimates, issuer spreads, prices on benchmark securities, bids, offers, and other market-related data. Since many securities do not trade on a daily basis, the pricing vendors use available information as applicable, such as benchmark yield curves, benchmarking of like securities, sector groupings, and matrix pricing, to determine the prices for individual securities. Each pricing vendor has an established challenge process in place for all security valuations, which facilitates resolution of price discrepancies identified by the Bank.

At least annually, the Bank conducts reviews of the multiple pricing vendors to update and confirm its understanding of the vendors’ pricing processes, methodologies, and control procedures.

The Bank’s valuation technique for estimating the fair values of its MBS first requires the establishment of a median vendor price for each security. If three prices are received, the middle price is the median price; if two prices are received, the average of the two prices is the median price; and if one price is received, it is the median price (and also the default fair value) subject to additional validation. All vendor prices that are within a specified tolerance threshold of the median price are included in the cluster of vendor prices that are averaged to establish a default fair value. All vendor prices that are outside the threshold (outliers) are subject to further analysis including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities and/or dealer estimates, or use of internal model prices, which are deemed to be reflective of all relevant facts and circumstances that a market participant would consider. Such analysis is also applied in those limited instances where no third-party vendor price or only one third-party vendor price is available in order to arrive at an

46

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

estimated fair value. If an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price, as appropriate) is used as the fair value rather than the default fair value. If, instead, the analysis confirms that an outlier is (or outliers are) not representative of fair value and the default fair value is the best estimate, then the default fair value is used as the fair value.

If all vendor prices received for a security are outside the tolerance threshold level of the median price, then there is no default fair value, and the fair value is determined by an evaluation of all outlier prices (or the other prices, as appropriate) as described above.

As of June 30, 2018, multiple vendor prices were received for most of the Bank’s MBS, and the fair value estimates for most of those securities were determined in accordance with the Bank’s valuation technique based on these vendor prices. Based on the Bank’s reviews of the pricing methods employed by the third-party pricing vendors and the relative lack of dispersion among the vendor prices (or, in those instances in which there were outliers, the Bank’s additional analyses), the Bank believes that its fair value estimates are reasonable and that the fair value measurements are classified appropriately in the fair value hierarchy. Based on limited market liquidity for PLRMBS, the fair value measurements for these securities were classified as Level 3 within the fair value hierarchy.

Investment Securities – FFCB Bonds – The Bank estimates the fair values of these securities using the methodology described above for Investment Securities – MBS.

Advances Recorded Under the Fair Value Option – Because quoted prices are not available for advances, the fair values are measured using model-based valuation techniques (such as calculating the present value of future cash flows and reducing the amount for accrued interest receivable).

The Bank’s primary inputs for measuring the fair value of advances recorded under the fair value option are market-based consolidated obligation yield curve (CO Curve) inputs obtained from the Office of Finance. The CO Curve is then adjusted to reflect the rates on replacement advances with similar terms and collateral. These spread adjustments are not market-observable and are evaluated for significance in the overall fair value measurement and the fair value hierarchy level of the advance. The Bank obtains market-observable inputs for complex advances recorded under the fair value option. These inputs may include volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew). The discount rates used in these calculations are the replacement advance rates for advances with similar terms. Pursuant to the Finance Agency’s advances regulation, advances with an original term to maturity or repricing period greater than six months generally require a prepayment fee sufficient to make the Bank financially indifferent to the borrower’s decision to prepay the advances. The Bank determined that no adjustment is required to the fair value measurement of advances for prepayment fees. In addition, the Bank did not adjust its fair value measurement of advances recorded under the fair value option for creditworthiness primarily because advances were fully collateralized.

Other Assets – The estimated fair value of grantor trust assets is based on quoted market prices.

Derivative Assets and Liabilities – In general, derivative instruments transacted and held by the Bank for risk management activities are traded in over-the-counter markets where quoted market prices are not readily available. These derivatives are interest rate-related. For these derivatives, the Bank measures fair value using internally developed discounted cash flow models that use market-observable inputs, such as the overnight index swap (OIS) curve and volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew), adjusted for counterparty credit risk, as necessary.

The Bank is subject to credit risk because of the risk of potential nonperformance by its derivative counterparties. To mitigate this risk, the Bank executes uncleared derivative transactions only with highly rated derivative de

47

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

alers and major banks (derivative dealer counterparties) that meet the Bank’s eligibility criteria. In addition, the Bank has entered into master netting agreements and bilateral credit support agreements with all active derivative dealer counterparties that provide for delivery of collateral at specified levels to limit the Bank’s net unsecured credit exposure to these counterparties. Under these policies and agreements, the amount of unsecured credit exposure to an individual derivative dealer counterparty is either (i) limited to an absolute dollar credit exposure limit according to the counterparty’s long-term debt or deposit credit rating, as determined by rating agencies or (ii) set at zero (subject to a minimum transfer amount). The Bank clears its cleared derivative transactions only through clearing agents that meet the Bank’s eligibility requirements, and the Bank’s credit exposure to the clearinghouse is secured by variation margin received from the clearinghouse. All credit exposure from derivative transactions entered into by the Bank with member counterparties that are not derivative dealers must be fully secured by eligible collateral. The Bank evaluated the potential for the fair value of the instruments to be affected by counterparty credit risk and determined that no adjustments to the overall fair value measurements were required.

The fair values of the derivative assets and liabilities include accrued interest receivable/payable and cash collateral remitted to/received from counterparties. The estimated fair values of the accrued interest receivable/payable and cash collateral approximate their carrying values because of their short-term nature. The fair values of derivatives that met the netting requirements are presented on a net basis. If these netted amounts are positive, they are classified as an asset and, if negative, they are classified as a liability.

Consolidated Obligations Recorded Under the Fair Value Option – Because quoted prices in active markets are not generally available for identical liabilities, the Bank measures fair values using internally developed models that use primarily market-observable inputs. The Bank’s primary input for measuring the fair value of consolidated obligation bonds is a market-based CO Curve obtained from the Office of Finance. The Office of Finance constructs the CO Curve using the Treasury yield curve as a base curve, which is adjusted by indicative consolidated obligation spreads obtained from market-observable sources. These market indications are generally derived from pricing indications from dealers, historical pricing relationships, and market activity for similar liabilities, such as recent GSE issuances or secondary market activity. For consolidated obligation bonds with embedded options, the Bank also obtains market-observable inputs, such as volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew).

Adjustments may be necessary to reflect the Bank’s credit quality or the credit quality of the FHLBank System when valuing consolidated obligation bonds measured at fair value. The Bank monitors its own creditworthiness and the creditworthiness of the other FHLBanks and the FHLBank System to determine whether any adjustments are necessary for creditworthiness in its fair value measurement of consolidated obligation bonds. The credit ratings of the FHLBank System and any changes to the credit ratings are the basis for the Bank to determine whether the fair values of consolidated obligations recorded under the fair value option have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

Subjectivity of Estimates Related to Fair Values of Financial Instruments. Estimates of the fair value of financial assets and liabilities using the methodologies described above are subjective and require judgments regarding significant matters, such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, methods to determine possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. Changes in these judgments often have a material effect on the fair value estimates.

48

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Fair Value Measurements. The tables below present the fair value of assets and liabilities, which are recorded on a recurring or nonrecurring basis at June 30, 2018, and December 31, 2017, by level within the fair value hierarchy.

June 30, 2018
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	657	$	—	$	—		$	657
MBS:
Other U.S. obligations – Ginnie Mae	—		5		—		—			5
Total trading securities	—		662		—		—			662
AFS securities:
PLRMBS	—		—		3,510		—			3,510
Total AFS securities	—		—		3,510		—			3,510
Advances(2)	—		6,083		—		—			6,083
Derivative assets, net: interest rate-related	—		93		—		48			141
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	6,838	$	3,510	$	48		$	10,405
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	1,404	$	—	$	—		$	1,404
Derivative liabilities, net: interest rate-related	—		117		—		(115		)	2
Total recurring fair value measurements – Liabilities	$	—	$	1,521	$	—	$	(115	)	$	1,406
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	2	$	—		$	2
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	2	$	—		$	2

49

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

December 31, 2017
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	1,158	$	—	$	—		$	1,158
MBS:
Other U.S. obligations – Ginnie Mae	—		6		—		—			6
Total trading securities	—		1,164		—		—			1,164
AFS securities:
PLRMBS	—		—		3,833		—			3,833
Total AFS securities	—		—		3,833		—			3,833
Advances(2)	—		6,431		—		—			6,431
Derivative assets, net: interest rate-related	—		174		—		(91		)	83
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	7,769	$	3,833	$	(91	)	$	11,520
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	949	$	—	$	—		$	949
Derivative liabilities, net: interest rate-related	—		85		—		(84		)	1
Total recurring fair value measurements – Liabilities	$	—	$	1,034	$	—	$	(84	)	$	950
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	3	$	—		$	3
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	3	$	—		$	3

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed by the Bank, with the same clearing agents and/or counterparty.

(2) Represents advances recorded under the fair value option at June 30, 2018, and December 31, 2017.

(3) Represents consolidated obligation bonds recorded under the fair value option at June 30, 2018, and December 31, 2017.

(4) The fair value information presented is as of the date the fair value adjustment was recorded during the six months ended June 30, 2018, and the year ended December 31, 2017.

The following tables present a reconciliation of the Bank’s AFS PLRMBS that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,686		$	4,294
Total gain/(loss) realized and unrealized included in:
Interest income	20			24
Net OTTI loss, credit-related	(5		)	(6		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	3			84
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(8		)	(1		)
Settlements	(198		)	(231		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	15		$	16

50

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	Six Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,833		$	4,489
Total gain/(loss) realized and unrealized included in:
Interest income	42			46
Net OTTI loss, credit-related	(6		)	(9		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	20			113
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(10		)	1
Settlements	(381		)	(476		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	36		$	36

Fair Value Option. The fair value option provides an entity with an irrevocable option to elect fair value as an alternative measurement for selected financial assets, financial liabilities, unrecognized firm commitments, and written loan commitments not previously carried at fair value. It requires an entity to display the fair value of those assets and liabilities for which the entity has chosen to use fair value on the face of the Statements of Condition. Fair value is used for both the initial and subsequent measurement of the designated assets, liabilities, and commitments, with the changes in fair value recognized in net income. Interest income and interest expense on advances and consolidated bonds carried at fair value are recognized solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized in non-interest income or non-interest expense.

For more information on the Bank’s election of the fair value option, see “Item 8. Financial Statements and Supplementary Data – Note 19 – Fair Values” in the Bank’s 2017 Form 10-K.

The Bank has elected the fair value option for certain financial instruments to assist in mitigating potential earnings volatility that can arise from economic hedging relationships in which the carrying value of the hedged item is not adjusted for changes in fair value. The potential earnings volatility associated with using fair value only for the derivative is the Bank’s primary reason for electing the fair value option for financial assets and liabilities that do not qualify for hedge accounting or that have not previously met or may be at risk for not meeting the hedge effectiveness requirements.

The following tables summarize the activity related to financial assets and liabilities for which the Bank elected the fair value option during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,637		$	1,315		$	3,816		$	2,236
New transactions elected for fair value option	342			89			1,772			95
Maturities and terminations	(882		)	—			(107		)	(1,215		)
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option	(14		)	(2		)	8			3
Change in accrued interest	—			2			1			(1		)
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

51

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

	Six Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,431		$	949		$	3,719		$	1,507
New transactions elected for fair value option	1,564			463			2,060			835
Maturities and terminations	(1,850		)	—			(299		)	(1,230		)
Net gain/(loss) from changes in fair value recognized in earnings	(63		)	(10		)	9			5
Change in accrued interest	1			2			1			1
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

For instruments for which the fair value option has been elected, the related contractual interest income and contractual interest expense are recorded as part of net interest income on the Statements of Income. The remaining changes in fair value for instruments for which the fair value option has been elected are recorded as net gains/ (losses) on financial instruments held under the fair value option in the Statements of Income, except for changes in fair value related to instrument-specific credit risk which are recorded in AOCI on the Statements of Condition. For advances and consolidated obligations recorded under the fair value option, the Bank determined that none of the remaining changes in fair value were related to instrument-specific credit risk for the three and six months ended June 30, 2018 and 2017. In determining that there has been no change in instrument-specific credit risk period to period, the Bank primarily considered the following factors:

• The Bank is a federally chartered GSE, and as a result of this status, the consolidated obligations have historically received the same credit ratings as the government bond credit rating of the United States, even though they are not obligations of the United States and are not guaranteed by the United States.

• The Bank is jointly and severally liable with the other FHLBanks for the payment of principal and interest on all consolidated obligations of each of the FHLBanks.

The following table presents the difference between the aggregate remaining contractual principal balance outstanding and aggregate fair value of advances and consolidated obligation bonds for which the Bank elected the fair value option at June 30, 2018, and December 31, 2017:

	June 30, 2018							December 31, 2017
	Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance			Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance
Advances(1)	$	6,161	$	6,083	$	(78	)	$	6,447	$	6,431	$	(16	)
Consolidated obligation bonds	1,418		1,404		(14		)	955		949		(6		)

(1) At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

Note 17 — Commitments and Contingencies

As provided by the FHLBank Act or regulations governing the operations of the FHLBanks, all FHLBanks have joint and several liability for all FHLBank consolidated obligations, which are backed only by the financial resources of the FHLBanks. The joint and several liability regulation authorizes the Finance Agency to require any FHLBank to repay all or a portion of the principal or interest on consolidated obligations for which another FHLBank is the primary obligor. The regulations provide a general framework for addressing the possibility that an FHLBank may be unable to repay the consolidated obligations for which it is the primary obligor. The Bank has never been asked or required to repay the principal or interest on any consolidated obligation on behalf of another FHLBank, and as of June 30, 2018, and through the filing date of this report, does not believe that it is probable that it will be asked to do so. The par value of the outstanding consolidated obligations of the FHLBanks was

52

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

$1,059,859 at June 30, 2018, and $1,034,260 at December 31, 2017. The par value of the Bank’s participation in consolidated obligations was $98,735 at June 30, 2018, and $115,602 at December 31, 2017. For more information on the joint and several liability regulation, see “Item 8. Financial Statements and Supplementary Data – Note 20 – Commitments and Contingencies” in the Bank’s 2017 Form 10-K.

Off-balance sheet commitments as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018						December 31, 2017
	Expire Within One Year		Expire After One Year		Total		Expire Within One Year		Expire After One Year		Total
Standby letters of credit outstanding	$	12,737	$	4,083	$	16,820	$	12,910	$	3,240	$	16,150
Commitments to fund additional advances	—		—		—		1		—		1
Commitments to issue consolidated obligation discount notes, par	57		—		57		134		—		134
Commitments to issue consolidated obligation bonds, par	—		—		—		595		—		595
Commitments to purchase mortgage loans	16		—		16		16		—		16

Standby letters of credit are generally issued for a fee on behalf of members to support their obligations to third parties. If the Bank is required to make a payment for a beneficiary’s drawing under a letter of credit, the amount is immediately due and payable by the member to the Bank and is charged to the member’s demand deposit account with the Bank. The original terms of these standby letters of credit range from 14 days to 15 years, including a final expiration in 2033. The Bank monitors the creditworthiness of members that have standby letters of credit. The value of the Bank’s obligations related to standby letters of credit is recorded in other liabilities and amounted to $22 at June 30, 2018, and $19 at December 31, 2017. Standby letters of credit are fully collateralized at the time of issuance. Based on the Bank’s credit analyses of members’ financial condition and collateral requirements, the Bank deemed it unnecessary to record any additional liability on the letters of credit outstanding as of June 30, 2018, and December 31, 2017.

Commitments to fund advances totaled $1 at December 31, 2017. There were no commitments to fund advances at June 30, 2018. Advances funded under advance commitments are fully collateralized at the time of funding (see Note 9 – Allowance for Credit Losses). Based on the Bank’s credit analyses of members’ financial condition and collateral requirements, the Bank deemed it unnecessary to record any additional liability on the advance commitments outstanding as of June 30, 2018, and December 31, 2017.

The Bank may enter into commitments that unconditionally obligate it to purchase mortgage loans from its members. Commitments are generally for periods not exceeding 60 days. Delivery commitments are recorded at fair value as derivative assets or derivative liabilities in the Statements of Condition.

The Bank executes over-the-counter uncleared interest rate exchange agreements with major banks and derivative entities affiliated with broker-dealers and has executed uncleared interest rate exchange agreements in the past with the Bank’s members. The Bank enters into master agreements with netting provisions and into bilateral credit support agreements with all active derivative dealer counterparties. All member counterparty master agreements, excluding those with derivative dealers, are subject to the terms of the Bank’s Advances and Security Agreement with members, and all member counterparties (except for those that are derivative dealers) must fully collateralize the Bank’s net credit exposure. For cleared derivatives, the clearinghouse is the Bank’s counterparty, and the Bank has clearing agreements with clearing agents that provide for delivery of initial margin to, and exchange of variation margin with, the clearinghouse. See Note 15 – Derivatives and Hedging Activities for additional information about the Bank’s pledged collateral and other credit-risk-related contingent features.

The Bank may be subject to various pending legal proceedings that may arise in the ordinary course of business. After consultation with legal counsel, the Bank does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on its financial condition or results of operations.

53

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

Note 18 — Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks

Transactions with Members and Nonmembers. The following tables set forth information at the dates and for the periods indicated with respect to transactions with members that have an officer or director serving on the Bank’s Board of Directors.

	June 30, 2018		December 31, 2017
Assets:
Advances	$	3,811	$	3,072
Mortgage loans held for portfolio	12		13
Accrued interest receivable	7		5
Liabilities:
Deposits	$	26	$	3
Capital:
Capital Stock	$	142	$	126

	Three Months Ended				Six Months Ended
	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Interest Income:
Advances	$	17	$	10	$	31	$	19

All transactions with members, nonmembers, and their affiliates are entered into in the ordinary course of business. As of June 30, 2018, and December 31, 2017, no shareholder owned more than 10% of the total voting interests in the Bank because of the statutory limit on members' voting rights. For more information on transactions with members and nonmembers, see “Item 8. Financial Statements and Supplementary Data – Note 21 – Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks” in the Bank’s 2017 Form 10-K.

Transactions with Other FHLBanks. The Bank may occasionally enter into transactions with other FHLBanks. These transactions are summarized below.

Deposits with other FHLBanks. The Bank may, from time to time, maintain deposits with other FHLBanks. Deposits with other FHLBanks totaled de minimis amounts at June 30, 2018, and December 31, 2017, which were recorded in the Statements of Condition in the Cash and due from banks line item.

Overnight Funds. The Bank may borrow or lend unsecured overnight funds from or to other FHLBanks. All such transactions are at current market rates. Interest income and interest expense related to these transactions with other FHLBanks are included in other interest income and interest expense from other borrowings in the Statements of Income. Balances outstanding at period end with other FHLBanks, if any, are identified in the Bank’s financial statements. During the six months ended June 30, 2018 and 2017, the Bank extended overnight loans to other FHLBanks for $280 and $1,005, respectively. During the six months ended June 30, 2018 and 2017, the Bank borrowed $1,510 and $15, respectively, from other FHLBanks. The impact to net interest income related to these transactions was de minimis in any period in this report.

MPF Mortgage Loans. The Bank pays a transaction services fee to the FHLBank of Chicago for its participation in the MPF program. This fee is assessed monthly and is based on the amount of mortgage loans in which the Bank invested and which remain outstanding on its Statements of Condition. For the three and six months ended June 30, 2018, the Bank recorded a de minimis amount and $1, respectively, in MPF transaction services fee expense to the FHLBank of Chicago, which was recorded in the Statements of Income as other expense. For the three and six

54

Federal Home Loan Bank of San Francisco

Notes to Financial Statements (continued)

months ended June 30, 2017, the Bank recorded a de minimis amount and $1, respectively, in MPF transaction services fee expense to the FHLBank of Chicago.

In addition, the Bank receives a counterparty fee from the FHLBank of Chicago for facilitating the sale of loans under the MPF program. For the three and six months ended June 30, 2018 and 2017, the Bank recorded a de minimis amount in MPF counterparty fee income from the FHLBank of Chicago, which was recorded in the Statements of Income as other income.

Consolidated Obligations. The Bank may, from time to time, transfer to or assume from another FHLBank the outstanding primary liability for FHLBank consolidated obligations. During the six months ended June 30, 2018 and 2017, the Bank did not transfer any debt to other FHLBanks or assume any debt from other FHLBanks.

Transactions with the Office of Finance. The Bank’s proportionate share of the cost of operating the Office of Finance is identified in the Statements of Income.

Note 19 — Subsequent Events

There were no material subsequent events identified, subsequent to June 30, 2018, until the time of the Form 10-Q filing with the Securities and Exchange Commission.

55

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Statements contained in this quarterly report on Form 10-Q, including statements describing the objectives, projections, estimates, or predictions of the future of the Federal Home Loan Bank of San Francisco (Bank) or the Federal Home Loan Bank System (FHLBank System), are “forward-looking statements.” These statements may use forward-looking terms, such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “likely,” “may,” “probable,” “project,” “should,” “will,” or their negatives or other variations on these terms, and include statements related to, among others, gains and losses on derivatives, plans to pay dividends and repurchase excess capital stock, future other-than-temporary impairment losses, future classification of securities, and reform legislation. The Bank cautions that by their nature, forward-looking statements involve risk or uncertainty that could cause actual results to differ materially from those expressed or implied in these forward-looking statements or could affect the extent to which a particular objective, projection, estimate, or prediction is realized. These risks and uncertainties include, among others, the following:

• changes in economic and market conditions, including conditions in the mortgage, housing, and capital markets;

• the volatility of market prices, rates, and indices;

• the timing and volume of market activity;

• political events, including legislative, regulatory, judicial, or other developments that affect the Bank, its members, counterparties, or investors in the consolidated obligations of the Federal Home Loan Banks (FHLBanks), such as the impact of any government-sponsored enterprises (GSE) legislative reforms, changes in the Federal Home Loan Bank Act of 1932, as amended (FHLBank Act), changes in applicable sections of the Federal Housing Enterprises Financial Safety and Soundness Act of 1992, or changes in other statutes or regulations applicable to the FHLBanks;

• changes in the Bank’s capital structure and composition;

• the ability of the Bank to pay dividends or redeem or repurchase capital stock;

• membership changes, including changes resulting from mergers or changes in the principal place of business of Bank members;

• the soundness of other financial institutions, including Bank members, nonmember borrowers, other counterparties, and the other FHLBanks;

• changes in Bank members’ demand for Bank advances;

• changes in the value or liquidity of collateral underlying advances to Bank members or nonmember borrowers or collateral pledged by the Bank’s derivative counterparties;

• changes in the fair value and economic value of, impairments of, and risks associated with the Bank’s investments in mortgage loans and mortgage-backed securities (MBS) or other assets and the related credit enhancement protections;

• changes in the Bank’s ability or intent to hold MBS and mortgage loans to maturity;

• competitive forces, including the availability of other sources of funding for Bank members;

• the willingness of the Bank’s members to do business with the Bank;

• changes in investor demand for consolidated obligations (including the terms of consolidated obligations) and/or the terms of interest rate exchange or similar agreements;

• the impact of any changes and developments in FHLBank System-wide debt issuance and governance practices;

• the ability of each of the other FHLBanks to repay the principal and interest on consolidated obligations for which it is the primary obligor and with respect to which the Bank has joint and several liability;

• changes in key Bank personnel;

• technology changes and enhancements, and the Bank’s ability to develop and support technology and information systems sufficient to manage the risks of the Bank’s business effectively; and

• changes in the FHLBanks’ long-term credit ratings.

Readers of this report should not rely solely on the forward-looking statements and should consider all risks and uncertainties addressed throughout this report, as well as those discussed under “Item 1A. Risk Factors” in the

Bank’s Annual Report on Form 10-K for the year ended December 31, 2017 (2017 Form 10-K).

56

Quarterly Overview

The Bank serves eligible financial institutions in Arizona, California and Nevada, the three states that make up the Eleventh District of the FHLBank System. The Bank’s primary business is providing competitively priced, collateralized loans, known as advances, to its member institutions and certain qualifying housing associates. The Bank's principal source of funds is debt issued in the capital markets. All 11 FHLBanks issue debt in the form of consolidated obligations through the Office of Finance as their agent, and all 11 FHLBanks are jointly and severally liable for the repayment of all consolidated obligations.

The Bank experienced strong earnings in the second quarter of 2018. Net income for the quarter was $104 million, compared with net income of $80 million for the second quarter of 2017. The $24 million increase in net income relative to the prior-year period primarily reflected higher net interest income, resulting from higher average balances of interest-earning assets, and an increase in other income related to improvements in net fair value gains and losses associated with derivatives, hedged items, and financial instruments carried at fair value. These increases in net income were partially offset by a voluntary charitable contribution of $5 million made by the Bank during the second quarter of 2018 for the Quality Jobs Fund, a donor-advised fund established to support quality job growth and small business expansion.

Retained earnings grew to $3.3 billion at June 30, 2018, from $3.2 billion at December 31, 2017, and the Bank paid dividends at an annualized rate of 7.00%, totaling $122 million, including $111 million in dividends on capital stock and $11 million in dividends on mandatorily redeemable capital stock during the second quarter of 2018.

Total assets decreased $17.2 billion during the first six months of 2018, to $106.2 billion at June 30, 2018, from $123.4 billion at December 31, 2017. Total advances decreased $7.1 billion, to $70.3 billion at June 30, 2018, from $77.4 billion at December 31, 2017. In addition, investments decreased $10.9 billion, to $32.7 billion at June 30, 2018, from $43.6 billion at December 31, 2017, primarily reflecting a decrease of $7.8 billion in securities purchased under agreements to resell and a decrease of $2.3 billion in Federal funds sold.

Accumulated other comprehensive income increased by $12 million during the first six months of 2018, to $330 million at June 30, 2018, from $318 million at December 31, 2017, primarily as a result of improvement in the fair value of the Bank’s private-label residential mortgage-backed securities (PLRMBS) classified as available-for-sale.

On July 26, 2018, the Bank’s Board of Directors declared a quarterly cash dividend on the capital stock outstanding during the second quarter of 2018 at an annualized rate of 7.00%. The dividend will total $56 million, including $5 million in dividends on mandatorily redeemable capital stock that will be reflected as interest expense in the third quarter of 2018. The Bank recorded the dividend on July 26, 2018, and expects to pay the dividend on or about August 13, 2018.

As of June 30, 2018, the Bank was in compliance with all of its regulatory capital requirements. The Bank’s total regulatory capital ratio was 6.1%, exceeding the 4.0% requirement. The Bank had $6.4 billion in permanent capital, exceeding its risk-based capital requirement of $2.0 billion.

The Bank will continue to monitor the condition of its PLRMBS portfolio, the ratio of the Bank’s estimated market value of total capital to par value of capital stock, its overall financial performance and retained earnings, developments in the mortgage and credit markets, and other relevant information as the basis for determining the payment of dividends and the repurchase of excess capital stock in future quarters.

57

Financial Highlights

The following table presents a summary of certain financial information for the Bank for the periods indicated.

Financial Highlights

(Unaudited)

(Dollars in millions)	June 30, 2018			March 31, 2018			December 31, 2017			September 30, 2017			June 30, 2017
Selected Balance Sheet Items at Quarter End
Total Assets	$	106,208		$	109,225		$	123,385		$	109,503		$	101,923
Advances	70,314			66,642			77,382			61,629			55,179
Mortgage Loans Held for Portfolio, Net	2,728			2,376			2,076			1,774			1,383
Investments(1)	32,703			39,832			43,570			45,775			45,035
Consolidated Obligations:(2)
Bonds	74,061			74,297			85,063			72,266			60,966
Discount Notes	24,519			27,703			30,440			29,902			33,335
Mandatorily Redeemable Capital Stock	255			309			309			342			404
Capital Stock —Class B —Putable	2,850			3,068			3,243			2,815			2,687
Unrestricted Retained Earnings	2,707			2,681			2,670			2,664			872
Restricted Retained Earnings	612			592			575			562			2,317
Accumulated Other Comprehensive Income/(Loss) (AOCI)	330			335			318			308			227
Total Capital	6,499			6,676			6,806			6,349			6,103
Selected Operating Results for the Quarter
Net Interest Income	$	154		$	148		$	143		$	146		$	144
Provision for/(Reversal of) Credit Losses on Mortgage Loans	—			—			—			—			—
Other Income/(Loss)	5			(8		)	(14		)	(4		)	(16		)
Other Expense	43			49			54			51			39
Affordable Housing Program Assessment	12			10			8			10			9
Net Income/(Loss)	$	104		$	81		$	67		$	81		$	80
Selected Other Data for the Quarter
Net Interest Margin(3)	0.58		%	0.47		%	0.49		%	0.55		%	0.59		%
Operating Expenses as a Percent of Average Assets	0.13			0.11			0.14			0.14			0.15
Return on Average Assets	0.38			0.26			0.23			0.30			0.33
Return on Average Equity	6.31			4.74			4.02			5.19			5.56
Annualized Dividend Rate	7.00			7.00			7.00			7.00			7.00
Dividend Payout Ratio(4)	54.78			65.67			72.32			53.39			51.21
Average Equity to Average Assets Ratio	6.08			5.40			5.64			5.84			5.87
Selected Other Data at Quarter End
Regulatory Capital Ratio(5)	6.05			6.09			5.51			5.83			6.16
Duration Gap (in months)	—			1			1			1			1

(1) Investments consist of interest-bearing deposits, securities purchased under agreements to resell, Federal funds sold, trading securities, available-for-sale securities, and held-to-maturity securities.

(2) As provided by the FHLBank Act or regulations governing the operations of the FHLBanks, all of the FHLBanks have joint and several liability for FHLBank consolidated obligations, which are backed only by the financial resources of the FHLBanks. The joint and several liability regulation authorizes the Federal Housing Finance Agency (Finance Agency) to require any FHLBank to repay all or a portion of the principal or interest on consolidated obligations for which another FHLBank is the primary obligor. The Bank has never been asked or required to repay the principal or interest on any consolidated obligation on behalf of another FHLBank, and as of June 30, 2018, and through the filing date of this report, does not believe that it is probable that it will be asked to do so. The par value of the outstanding consolidated obligations of all FHLBanks at the dates indicated was as follows:

58

	Par Value (In millions)
June 30, 2018	$	1,059,859
March 31, 2018	1,019,229
December 31, 2017	1,034,260
September 30, 2017	1,028,710
June 30, 2017	1,011,526

(3) Net interest margin is net interest income (annualized) divided by average interest-earning assets.

(4) This ratio is calculated as dividends per share divided by net income per share.

(5) This ratio is calculated as regulatory capital divided by total assets. Regulatory capital includes retained earnings, Class B capital stock, and mandatorily redeemable capital stock (which is classified as a liability), but excludes AOCI.

Results of Operations

Net Interest Income. The primary source of the Bank’s earnings is net interest income, which is the interest earned on advances, mortgage loans, and investments. This includes net accretion of related income, which is a result of improvement in expected cash flows on certain other-than-temporarily-impaired PLRMBS, less interest paid on consolidated obligations, deposits, mandatorily redeemable capital stock, and other borrowings. The Average Balance Sheets tables that follow present the average balances of interest-earning asset categories and the sources that funded those interest-earning assets (liabilities and capital) for the three and six months ended June 30, 2018 and 2017, together with the related interest income and expense. They also present the average rates on total interest-earning assets and the average costs of total funding sources.

59

Second Quarter of 2018 Compared to Second Quarter of 2017

Average Balance Sheets
	Three Months Ended
	June 30, 2018							June 30, 2017
(Dollars in millions)	Average Balance			Interest Income/ Expense		Average Rate		Average Balance			Interest Income/ Expense		Average Rate
Assets
Interest-earning assets:
Interest-bearing deposits	$	1,388		$	6	1.76	%	$	740		$	2	0.92	%
Securities purchased under agreements to resell	5,216			23		1.78		1,129			3		0.87
Federal funds sold	8,789			42		1.92		10,439			26		1.00
Trading securities:
Mortgage-backed securities (MBS)	6			—		2.92		7			—		2.18
Other investments	665			4		2.13		1,395			4		1.18
Available-for-sale (AFS) securities:(1)
MBS(2)	3,230			56		6.96		3,999			60		6.01
Held-to-maturity (HTM) securities:(1)
MBS	13,374			83		2.51		12,176			65		2.16
Other investments	683			4		2.37		791			2		1.19
Mortgage loans held for portfolio	2,566			23		3.64		1,142			11		3.86
Advances(3)	71,781			380		2.12		65,797			193		1.18
Loans to other FHLBanks	2			—		1.88		7			—		0.86
Total interest-earning assets	107,700			621		2.32		97,622			366		1.50
Other assets(4)(5)	771			—				1,075			—
Total Assets	$	108,471		$	621			$	98,697		$	366
Liabilities and Capital
Interest-bearing liabilities:
Consolidated obligations:
Bonds(3)	$	72,583		$	339	1.87	%	$	55,691		$	147	1.06	%
Discount notes	28,230			122		1.73		35,659			67		0.76
Deposits and other borrowings	288			1		1.59		274			1		0.92
Mandatorily redeemable capital stock	269			5		7.97		403			7		7.69
Total interest-bearing liabilities	101,370			467		1.85		92,027			222		0.97
Other liabilities(4)	510			—				873			—
Total Liabilities	101,880			467				92,900			222
Total Capital	6,591			—				5,797			—
Total Liabilities and Capital	$	108,471		$	467			$	98,697		$	222
Net Interest Income				$	154						$	144
Net Interest Spread(6)						0.47	%						0.53	%
Net Interest Margin(7)						0.58	%						0.59	%
Interest-earning Assets/Interest-bearing Liabilities	106.24		%					106.08		%

(1) The average balances of AFS securities and HTM securities are reflected at amortized cost. As a result, the average rates do not reflect changes in fair value or non-credit-related OTTI losses.

(2) Interest income on AFS securities includes accretion of yield adjustments on other-than-temporarily impaired PLRMBS (resulting from improvement in expected cash flows) totaling $15 million and $17 million for the three months ended June 30, 2018 and 2017, respectively.

(3) Interest income/expense and average rates include the effect of associated interest rate exchange agreements, as follows:

60

	Three Months Ended
	June 30, 2018								June 30, 2017
(In millions)	(Amortization)/ Accretion of Hedging Activities		Net Interest Settlements			Total Net Interest Income/(Expense)			(Amortization)/ Accretion of Hedging Activities		Net Interest Settlements			Total Net Interest Income/(Expense)
Advances	$	—	$	17		$	17		$	—	$	(8	)	$	(8	)
Consolidated obligation bonds	—		(8		)	(8		)	—		6			6

(4) Includes forward settling transactions and valuation adjustments for certain cash items.

(5) Includes non-credit-related OTTI losses on AFS and HTM securities.

(6) Net interest spread is the difference between the average rate earned on interest-earning assets and the average rate paid on interest-bearing liabilities.

(7) Net interest margin is net interest income (annualized) divided by average interest-earning assets.

Net interest income in the second quarter of 2018 was $154 million, a 7% increase from $144 million in the second quarter of 2017. The following table details the changes in interest income and interest expense for the second quarter of 2018 compared to the second quarter of 2017. Changes in both volume and interest rates influence changes in net interest income, net interest spread, and net interest margin.

Change in Net Interest Income: Rate/Volume Analysis Three Months Ended June 30, 2018, Compared to Three Months Ended June 30, 2017
	Increase/ (Decrease)			Attributable to Changes in(1)
(In millions)				Average Volume			Average Rate
Interest-earning assets:
Interest-bearing deposits	$	4		$	2		$	2
Securities purchased under agreements to resell	20			16			4
Federal funds sold	16			(5		)	21
Trading securities: Other investments	—			(3		)	3
AFS securities: MBS	(4		)	(13		)	9
HTM securities:
MBS	18			7			11
Other investments	2			—			2
Mortgage loans held for portfolio	12			13			(1		)
Advances(2)	187			19			168
Total interest-earning assets	255			36			219
Interest-bearing liabilities:
Consolidated obligations:
Bonds(2)	192			54			138
Discount notes	55			(16		)	71
Mandatorily redeemable capital stock	(2		)	(2		)	—
Total interest-bearing liabilities	245			36			209
Net interest income	$	10		$	—		$	10

(1) Combined rate/volume variances, a third element of the calculation, are allocated to the rate and volume variances based on their relative sizes.

(2) Interest income/expense and average rates include the interest effect of associated interest rate exchange agreements.

The net interest margin was 58 basis points for the second quarter of 2018, 1 basis point lower than the net interest margin for the second quarter of 2017, which was 59 basis points. The net interest spread was 47 basis points for the second quarter of 2018, 6 basis points lower than the net interest spread for the second quarter of 2017, which was 53 basis points. These decreases were primarily due to a decline in spreads on interest-earning assets.

For securities previously identified as other-than-temporarily impaired, the Bank updates its estimate of future estimated cash flows on a regular basis. If there is no additional impairment on the security, the yield of the security

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is adjusted upward on a prospective basis and accreted into interest income when there is a significant increase in the expected cash flows. As a result of improvements in the estimated cash flows of securities previously identified as other-than-temporarily impaired, the accretion of yield adjustments is likely to continue to be a positive source of net interest income in future periods.

Member demand for wholesale funding from the Bank can vary greatly depending on a number of factors, including economic and market conditions, competition from other wholesale funding sources, member deposit inflows and outflows, the activity level of the primary and secondary mortgage markets, and strategic decisions made by individual member institutions. As a result, Bank asset levels and operating results may vary significantly from period to period.

Other Income/(Loss). The following table presents the components of “Other Income/(Loss)” for the three months ended June 30, 2018 and 2017.

Other Income/(Loss)
	Three Months Ended
(In millions)	June 30, 2018			June 30, 2017
Other Income/(Loss):
Total OTTI loss	$	(13	)	$	(7	)
Net amount of OTTI loss reclassified to/(from) AOCI	8			1
Net OTTI loss, credit-related	(5		)	(6		)
Net gain/(loss) on trading securities(1)	—			(1		)
Net gain/(loss) on advances and consolidated obligation bonds held under fair value option	(12		)	5
Net gain/(loss) on derivatives and hedging activities	17			(19		)
Other	5			5
Total Other Income/(Loss)	$	5		$	(16	)

(1) The net gain/(loss) on trading securities that were economically hedged totaled $1 million and a de minimis amount for the three months ended June 30, 2018 and 2017, respectively.

Net Other-Than-Temporary Impairment Loss, Credit-Related – Each quarter, the Bank updates its OTTI analysis to reflect current housing market conditions, changes in anticipated housing market conditions, observed and anticipated borrower behavior, and updated information on the loans supporting the Bank’s PLRMBS.

Additional information about the OTTI loss is provided in “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Investments” and in “Item 1. Financial Statements – Note 6 – Other-Than-Temporary Impairment Analysis.”

Net Gain/(Loss) on Advances and Consolidated Obligation Bonds Held Under Fair Value Option – The following table presents the net gain/(loss) recognized in earnings on advances and consolidated obligation bonds held under the fair value option for the three months ended June 30, 2018 and 2017.

 

Net Gain/(Loss) from Changes in Fair Value Recognized in Earnings
	Three Months Ended
(In millions)	June 30, 2018			June 30, 2017
Advances	$	(14	)	$	8
Consolidated obligation bonds	2			(3		)
Total	$	(12	)	$	5

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Under the fair value option, the Bank elected to carry certain assets and liabilities at fair value. In general, transactions elected for the fair value option are in economic hedge relationships. Gains or losses on these transactions are generally offset by losses or gains on the derivatives that economically hedge these instruments.

The net gains/(losses) on advances and consolidated obligation bonds held under the fair value option were primarily driven by the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors relative to the actual terms on the advances and consolidated obligation bonds during the period.

Additional information about advances and consolidated obligation bonds held under the fair value option is provided in “Item 1. Financial Statements – Note 16 – Fair Value.”

Net Gain/(Loss) on Derivatives and Hedging Activities – The following table shows the accounting classification of hedges and the categories of hedged items that contributed to the gains and losses on derivatives and hedged items that were recorded in “Net gain/(loss) on derivatives and hedging activities” in the second quarter of 2018 and 2017.

Sources of Gains/(Losses) Recorded in Net Gain/(Loss) on Derivatives and Hedging Activities Three Months Ended June 30, 2018, Compared to Three Months Ended June 30, 2017
	Three Months Ended
(In millions)	June 30, 2018												June 30, 2017
	Gain/(Loss)						Income/ (Expense) on						Gain/(Loss)						Income/ (Expense) on
Hedged Item	Fair Value Hedges, Net			Economic Hedges			Economic Hedges			Total			Fair Value Hedges, Net			Economic Hedges			Economic Hedges			Total
Advances:
Elected for fair value option	$	—		$	15		$	4		$	19		$	—		$	(12	)	$	(6	)	$	(18	)
Not elected for fair value option	3			(2		)	(2		)	(1		)	(3		)	3			—			—
Consolidated obligation bonds:
Elected for fair value option	—			(3		)	—			(3		)	—			3			1			4
Not elected for fair value option	(1		)	(3		)	(6		)	(10		)	1			3			2			6
Consolidated obligation discount notes:
Not elected for fair value option	—			12			(3		)	9			—			(7		)	(10		)	(17		)
MBS:
Not elected for fair value option	—			(1		)	—			(1		)	—			(4		)	—			(4		)
Non-MBS investments:
Not elected for fair value option	—			(1		)	—			(1		)	—			1			—			1
Mortgage delivery commitment:
Not elected for fair value option	—			5			—			5			—			9			—			9
Other(1)	—			—			—			—			—			—			—			—
Total	$	2		$	22		$	(7	)	$	17		$	(2	)	$	(4	)	$	(13	)	$	(19	)

(1) Amount in other includes the price alignment amount on derivatives for which variation margin on cleared derivatives is characterized as a daily settled contract.

During the second quarter of 2018, net gains on derivatives and hedging activities totaled $17 million compared to net losses of $19 million in the second quarter of 2017. These amounts included expense of $7 million and expense of $13 million resulting from net settlements on derivative instruments used in economic hedges in the second quarter of 2018 and 2017, respectively. Excluding the impact of income or expense from net settlements on derivative instruments used in economic hedges, the net gains or losses on fair value and economic hedges were primarily associated with the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors during the period.

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The ongoing impact of these valuation adjustments on the Bank cannot be predicted and the effects of these valuation adjustments may lead to significant volatility in future earnings, including earnings available for dividends.

Additional information about derivatives and hedging activities is provided in “Item 1. Financial Statements – Note 15 – Derivatives and Hedging Activities.”

Other Expense. During the second quarter of 2018, other expenses totaled $43 million, compared to $39 million in the second quarter of 2017, primarily reflecting the voluntary charitable contribution made during the second quarter of 2018.

Quality Jobs Fund Expense and Other – In the first quarter of 2017, the Board of Directors approved an allocation of $100 million for the Quality Jobs Fund, a donor-advised fund established to support quality jobs growth and small business expansion to be funded by the Bank in incremental amounts. During the second quarter of 2018, the Bank made a voluntary charitable contribution of $5 million for the Quality Jobs Fund as well as a voluntary contribution of $1 million to the Affordable Housing Program (AHP) to offset the impact on the AHP assessment of the charitable contribution expense. The Bank made no voluntary charitable contributions for the Quality Jobs Fund in the second quarter of 2017.

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Six Months Ended June 30, 2018, Compared to Six Months Ended June 30, 2017

Average Balance Sheets
	Six Months Ended
	June 30, 2018							June 30, 2017
(Dollars in millions)	Average Balance			Interest Income/ Expense		Average Rate		Average Balance			Interest Income/ Expense		Average Rate
Assets
Interest-earning assets:
Interest-bearing deposits	$	1,271		$	10	1.66	%	$	661		$	3	0.82	%
Securities purchased under agreements to resell	3,797			32		1.69		1,020			4		0.74
Federal funds sold	11,307			93		1.67		10,458			45		0.88
Trading securities:
Mortgage-backed securities (MBS)	6			—		2.80		7			—		2.14
Other investments	790			8		1.93		1,505			8		1.07
Available-for-sale (AFS) securities:(1)
MBS(2)	3,314			113		6.86		4,109			121		5.93
Held-to-maturity (HTM) securities:(1)
MBS	13,552			162		2.42		12,117			129		2.15
Other investments	560			6		2.10		1,002			5		1.09
Mortgage loans held for portfolio	2,407			44		3.71		1,020			20		4.00
Advances(3)	80,384			749		1.88		63,996			346		1.09
Loans to other FHLBanks	2			—		1.70		3			—		0.86
Total interest-earning assets	117,390			1,217		2.09		95,898			681		1.43
Other assets(4)(5)	832			—				936			—
Total Assets	$	118,222		$	1,217			$	96,834		$	681
Liabilities and Capital
Interest-bearing liabilities:
Consolidated obligations:
Bonds(3)	$	76,924		$	646	1.69	%	$	52,690		$	263	1.01	%
Discount notes	33,397			256		1.54		36,985			121		0.66
Deposits and other borrowings	297			2		1.42		249			1		0.69
Mandatorily redeemable capital stock	289			11		7.73		426			18		8.75
Borrowings from other FHLBanks	8			—		1.66		15			—		0.52
Total interest-bearing liabilities	110,915			915		1.66		90,365			403		0.90
Other liabilities(4)	555			—				734			—
Total Liabilities	111,470			915				91,099			403
Total Capital	6,752			—				5,735			—
Total Liabilities and Capital	$	118,222		$	915			$	96,834		$	403
Net Interest Income				$	302						$	278
Net Interest Spread(6)						0.43	%						0.53	%
Net Interest Margin(7)						0.52	%						0.58	%
Interest-earning Assets/Interest-bearing Liabilities	105.84		%					106.12		%

(1) The average balances of AFS securities and HTM securities are reflected at amortized cost. As a result, the average rates do not reflect changes in fair value or non-credit-related OTTI losses.

(2) Interest income on AFS securities includes accretion of yield adjustments on other-than-temporarily impaired PLRMBS (resulting from improvement in expected cash flows) totaling $32 million and $34 million for the six months ended June 30, 2018 and 2017, respectively.

(3) Interest income/expense and average rates include the effect of associated interest rate exchange agreements, as follows:

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	Six Months Ended
	June 30, 2018								June 30, 2017
(In millions)	(Amortization)/ Accretion of Hedging Activities		Net Interest Settlements			Total Net Interest Income/(Expense)			(Amortization)/ Accretion of Hedging Activities		Net Interest Settlements			Total Net Interest Income/(Expense)
Advances	$	—	$	20		$	20		$	—	$	(17	)	$	(17	)
Consolidated obligation bonds	—		(7		)	(7		)	—		15			15

(4) Includes forward settling transactions and valuation adjustments for certain cash items.

(5) Includes non-credit-related OTTI losses on AFS and HTM securities.

(6) Net interest spread is the difference between the average rate earned on interest-earning assets and the average rate paid on interest-bearing liabilities.

(7) Net interest margin is net interest income (annualized) divided by average interest-earning assets.

Net interest income in the first six months of 2018 was $302 million, a 9% increase from $278 million in the first six months of 2017. The following table details the changes in interest income and interest expense for the first six months of 2018 compared to the first six months of 2017. Changes in both volume and interest rates influence changes in net interest income, net interest spread, and net interest margin.

Change in Net Interest Income: Rate/Volume Analysis Six Months Ended June 30, 2018, Compared to Six Months Ended June 30, 2017
	Increase/ (Decrease)			Attributable to Changes in(1)
(In millions)				Average Volume			Average Rate
Interest-earning assets:
Interest-bearing deposits	$	7		$	3		$	4
Securities purchased under agreements to resell	28			19			9
Federal funds sold	48			4			44
Trading securities: Other investments	—			(5		)	5
AFS securities: MBS	(8		)	(25		)	17
HTM securities:
MBS	33			16			17
Other investments	1			(3		)	4
Mortgage loans held for portfolio	24			26			(2		)
Advances(2)	403			105			298
Total interest-earning assets	536			140			396
Interest-bearing liabilities:
Consolidated obligations:
Bonds(2)	383			154			229
Discount notes	135			(13		)	148
Deposits and other borrowings	1			—			1
Mandatorily redeemable capital stock	(7		)	(5		)	(2		)
Total interest-bearing liabilities	512			136			376
Net interest income	$	24		$	4		$	20

(1) Combined rate/volume variances, a third element of the calculation, are allocated to the rate and volume variances based on their relative sizes.

(2) Interest income/expense and average rates include the interest effect of associated interest rate exchange agreements.

The net interest margin was 52 basis points for the first six months of 2018, 6 basis points lower than the net interest margin for the first six months of 2017, which was 58 basis points. The net interest spread was 43 basis points for the first six months of 2018, 10 basis points lower than the net interest spread for the first six months of 2017, which was 53 basis points. These decreases were primarily due to a decline in spreads on interest-earning assets.

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For securities previously identified as other-than-temporarily impaired, the Bank updates its estimate of future estimated cash flows on a regular basis. If there is no additional impairment on the security, the yield of the security is adjusted upward on a prospective basis and accreted into interest income when there is a significant increase in the expected cash flows. As a result of improvements in the estimated cash flows of securities previously identified as other-than-temporarily impaired, the accretion of yield adjustments is likely to continue to be a positive source of net interest income in future periods.

Member demand for wholesale funding from the Bank can vary greatly depending on a number of factors, including economic and market conditions, competition from other wholesale funding sources, member deposit inflows and outflows, the activity level of the primary and secondary mortgage markets, and strategic decisions made by individual member institutions. As a result, Bank asset levels and operating results may vary significantly from period to period.

Other Income/(Loss). The following table presents the components of “Other Income/(Loss)” for the six months ended June 30, 2018 and 2017.

Other Income/(Loss)
	Six Months Ended
(In millions)	June 30, 2018			June 30, 2017
Other Income/(Loss):
Total OTTI loss	$	(16	)	$	(8	)
Net amount of OTTI loss reclassified to/(from) AOCI	10			(1		)
Net OTTI loss, credit-related	(6		)	(9		)
Net gain/(loss) on trading securities(1)	(1		)	—
Net gain/(loss) on advances and consolidated obligation bonds held under fair value option	(53		)	4
Net gain/(loss) on derivatives and hedging activities	48			(28		)
Gains on litigation settlements, net	—			119
Other	9			10
Total Other Income/(Loss)	$	(3	)	$	96

(1) The net gain/(loss) on trading securities that were economically hedged totaled $1 million and $1 million for the six months ended June 30, 2018 and 2017, respectively.

Net Other-Than-Temporary Impairment Loss, Credit-Related – Each quarter, the Bank updates its OTTI analysis to reflect current housing market conditions, changes in anticipated housing market conditions, observed and anticipated borrower behavior, and updated information on the loans supporting the Bank’s PLRMBS.

Additional information about the OTTI loss is provided in “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Investments” and in “Item 1. Financial Statements – Note 6 – Other-Than-Temporary Impairment Analysis.”

Net Gain/(Loss) on Advances and Consolidated Obligation Bonds Held Under Fair Value Option – The following table presents the net gain/(loss) on advances and consolidated obligation bonds held under the fair value option for the six months ended June 30, 2018 and 2017.

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Net Gain/(Loss) on Advances and Consolidated Obligation Bonds Held Under Fair Value Option
	Six Months Ended
(In millions)	June 30, 2018			June 30, 2017
Advances	$	(63	)	$	9
Consolidated obligation bonds	10			(5		)
Total	$	(53	)	$	4

Under the fair value option, the Bank elected to carry certain assets and liabilities at fair value. In general, transactions elected for the fair value option are in economic hedge relationships. Gains or losses on these transactions are generally offset by losses or gains on the derivatives that economically hedge these instruments.

The net gains/(losses) on advances and consolidated obligation bonds held under the fair value option were primarily driven by the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors relative to the actual terms on the advances and consolidated obligation bonds during the period.

Additional information about advances and consolidated obligation bonds held under the fair value option is provided in “Item 1. Financial Statements – Note 16 – Fair Value.”

Net Gain/(Loss) on Derivatives and Hedging Activities – The following table shows the accounting classification of hedges and the categories of hedged items that contributed to the gains and losses on derivatives and hedged items that were recorded in “Net gain/(loss) on derivatives and hedging activities” in the first six months of 2018 and 2017.

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Sources of Gains/(Losses) Recorded in Net Gain/(Loss) on Derivatives and Hedging Activities Six Months Ended June 30, 2018, Compared to Six Months Ended June 30, 2017
	Six Months Ended
(In millions)	June 30, 2018												June 30, 2017
	Gain/(Loss)						Income/ (Expense) on						Gain/(Loss)						Income/ (Expense) on
Hedged Item	Fair Value Hedges, Net			Economic Hedges			Economic Hedges			Total			Fair Value Hedges, Net			Economic Hedges			Economic Hedges			Total
Advances:
Elected for fair value option	$	—		$	69		$	3		$	72		$	—		$	(4	)	$	(13	)	$	(17	)
Not elected for fair value option	5			(12		)	(1		)	(8		)	(3		)	2			1			—
Consolidated obligation bonds:
Elected for fair value option	—			(11		)	—			(11		)	—			4			2			6
Not elected for fair value option	(1		)	(44		)	(3		)	(48		)	1			3			3			7
Consolidated obligation discount notes:
Not elected for fair value option	—			41			(6		)	35			—			(13		)	(18		)	(31		)
MBS:
Not elected for fair value option	—			—			—			—			—			(4		)	—			(4		)
Non-MBS investments:
Not elected for fair value option	—			—			—			—			—			(1		)	—			(1		)
Mortgage delivery commitment:
Not elected for fair value option	—			9			—			9			—			12			—			12
Other(1)	—			(1		)	—			(1		)	—			—			—			—
Total	$	4		$	51		$	(7	)	$	48		$	(2	)	$	(1	)	$	(25	)	$	(28	)

(1) Amount in other includes the price alignment amount on derivatives for which variation margin on cleared derivatives is characterized as a daily settled contract.

During the first six months of 2018, net gains on derivatives and hedging activities totaled $48 million compared to net losses of $28 million in the first six months of 2017. These amounts included expense of $7 million and expense of $25 million resulting from net settlements on derivative instruments used in economic hedges in the first six months of 2018 and 2017, respectively. Excluding the impact of income or expense from net settlements on derivative instruments used in economic hedges, the net gains or losses on fair value and economic hedges were primarily associated with the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors during the period.

The ongoing impact of these valuation adjustments on the Bank cannot be predicted and the effects of these valuation adjustments may lead to significant volatility in future earnings, including earnings available for dividends.

Additional information about derivatives and hedging activities is provided in “Item 1. Financial Statements – Note 15 – Derivatives and Hedging Activities.”

Gains on Litigation Settlements, Net – During the first six months of 2017, gains relating to settlements with certain defendants in connection with the Bank’s PLRMBS litigation (after netting certain legal fees and expenses) totaled $119 million. The Bank had no settlement gains in the first six months of 2018.

Other Expense. During the first six months of 2018, other expenses totaled $92 million, compared to $119 million in the first six months of 2017, primarily reflecting the decrease in voluntary charitable contributions made during the first six months of 2018.

Quality Jobs Fund Expense and Other – During the first six months of 2018 and 2017, the Bank made voluntary charitable contributions of $15 million and $40 million, respectively, for the Quality Jobs Fund, as well as voluntary

69

contributions of $2 million and $4 million, respectively, to the Affordable Housing Program (AHP) to offset the impact on the AHP assessment of the charitable contribution expense.

Return on Average Equity

Return on average equity (ROE) was 6.31% (annualized) for the second quarter of 2018, compared to 5.56% (annualized) for the second quarter of 2017. The increase primarily reflected higher net income for the second quarter of 2018, which increased 30%, from $80 million in the second quarter of 2017 to $104 million in the second quarter of 2018.

Return on average equity (ROE) was 5.51% (annualized) for the first six months of 2018, compared to 8.03% (annualized) for the first six months of 2017. The decrease primarily reflected lower net income for the first six months of 2018, which decreased 19%, from $228 million in the first six months of 2017 to $185 million in the first six months of 2018. The decrease in net income primarily reflected a gain on settlements of $119 million (after netting certain legal fees and expenses) in the prior-year period relating to the Bank’s PLRMBS litigation. The Bank had no settlement gains in first six months of 2018.

Dividends and Retained Earnings

The Bank’s Excess Stock Repurchase, Retained Earnings, and Dividend Framework (Framework) summarizes the Bank’s capital management principles and objectives, as well as its policies and practices with respect to restricted retained earnings, dividend payments, and the repurchase of excess capital stock. As required by the regulations governing the operations of the FHLBanks, the Framework is reviewed at least annually by the Bank’s Board of Directors. The Board of Directors may amend the Framework from time to time.

In accordance with the Framework, the Bank retains certain amounts in restricted retained earnings, which are not made available for dividends in the current dividend period, and maintains an amount of total retained earnings at least equal to its required retained earnings as described in the Framework. The Bank may be restricted from paying dividends if it is not in compliance with any of its minimum capital requirements or if payment would cause the Bank to fail to meet any of its minimum capital requirements. In addition, the Bank may not pay dividends if any principal or interest due on any consolidated obligation has not been paid in full or is not expected to be paid in full, or, under certain circumstances, if the Bank fails to satisfy certain liquidity requirements under applicable regulations.

The regulatory liquidity requirements state that each FHLBank must: (i) maintain eligible high quality assets (advances with a maturity not exceeding five years, U.S. Treasury securities investments, and deposits in banks or trust companies) in an amount equal to or greater than the deposits received from members, and (ii) hold contingent liquidity in an amount sufficient to meet its liquidity needs for at least five business days without access to the consolidated obligations markets. At June 30, 2018, advances maturing within five years totaled $69.5 billion, significantly in excess of the $379 million of member deposits on that date. At December 31, 2017, advances maturing within five years totaled $76.6 billion, significantly in excess of the $281 million of member deposits on that date.

As of June 30, 2018, and December 31, 2017, the Bank held estimated total sources of funds in an amount that would have allowed the Bank to meet its liquidity needs for more than five consecutive business days without issuing new consolidated obligations, subject to certain conditions. For more information, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Liquidity Risk” in the Bank’s 2017 Form 10-K.

Finance Agency rules do not permit the Bank to pay dividends in the form of capital stock if its excess capital stock exceeds 1% of its total assets. Excess capital stock is defined as the aggregate of the capital stock held by each shareholder in excess of its minimum capital stock requirement, as established by the Bank’s capital plan. As of June 30, 2018, the Bank’s excess capital stock totaled $152 million, or 0.14% of total assets.

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In January 2017, the Framework was amended and approved by the Bank’s Board of Directors to include a dividend philosophy to endeavor to pay a quarterly dividend at an annualized rate between 5% and 7%. The decision to declare any dividend and the dividend rate are at the discretion of the Bank’s Board of Directors, which may choose to follow the dividend philosophy as guidance in the dividend declaration. The Bank’s historical dividend rates and the dividend philosophy are not indicative of future dividend declarations. The Bank’s dividend policy may be revised or eliminated in the future and there can be no assurance as to future dividends.

In the second quarter of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $63 million, including $58 million in dividends on capital stock and $5 million in dividends on mandatorily redeemable capital stock. In the second quarter of 2017, the Bank paid dividends at an annualized rate of 7.00%, totaling $48 million, including $41 million in dividends on capital stock and $7 million in dividends on mandatorily redeemable capital stock.

In the first six months of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $122 million, including $111 million in dividends on capital stock and $11 million in dividends on mandatorily redeemable capital stock. In the first six months of 2017, the Bank paid dividends at an annualized rate of 8.04%, totaling $113 million, including $95 million in dividends on capital stock and $18 million in dividends on mandatorily redeemable capital stock.

The Bank paid these dividends in cash. Dividends on capital stock are recognized as dividends on the Statements of Capital Accounts, and dividends on mandatorily redeemable capital stock are recognized as interest expense on the Statements of Income.

On July 26, 2018, the Bank’s Board of Directors declared a cash dividend on the capital stock outstanding during the second quarter of 2018 at an annualized rate of 7.00%, totaling $56 million, including $51 million in dividends on capital stock and $5 million in dividends on mandatorily redeemable capital stock. The Bank recorded the dividend on July 26, 2018. The Bank expects to pay the dividend on August 13, 2018. Dividends on mandatorily redeemable capital stock will be recognized as interest expense in the third quarter of 2018.

The Bank’s Framework assesses the level and adequacy of retained earnings and establishes amounts to be retained in restricted retained earnings, which are not made available in the current dividend period, and maintains an amount of total retained earnings at least equal to its required retained earnings as described in the Framework. Prior to July 2017, the Bank’s Framework had three categories of restricted retained earnings: Valuation Adjustments, Other (which represented a targeted amount), and the Joint Capital Enhancement (JCE Agreement). Under the Framework, the Bank’s required amount of restricted retained earnings was determined using the Bank’s retained earnings methodology. As determined using the Bank’s methodology, from July 2015 to January 2017, the Bank’s restricted retained earnings requirement was $2,000, and from January 2017 to July 2017, the Bank’s restricted retained earnings requirement was $2,300.

In July 2017, the Bank’s Board of Directors approved the transfer of all amounts classified as restricted retained earnings, other than the amounts related to the JCE Agreement, to unrestricted retained earnings. As a conforming change related to the transfer, the Bank’s Board of Directors amended the Framework to eliminate two of the categories of restricted retained earnings (Valuation Adjustments and Other) and approved revisions to the Bank’s retained earnings methodology to provide for a required level of total retained earnings of $2,300 for loss protection, capital compliance, and business growth. In January 2018, the methodology was further revised to provide a required level of total retained earnings of $2,500. The Bank satisfies its retained earnings requirement with both restricted retained earnings (i.e., amounts related to the JCE Agreement) and unrestricted retained earnings.

Total restricted retained earnings were $612 million and $575 million as of June 30, 2018, and December 31, 2017, respectively.

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The Bank will continue to monitor the condition of its PLRMBS portfolio, the ratio of the Bank’s estimated market value of total capital to par value of capital stock, its overall financial performance and retained earnings, developments in the mortgage and credit markets, and other relevant information as the basis for determining the payment of dividends in future quarters.

For more information, see “Item 1. Financial Statements – Note 13 – Capital” in this report and see “Item 1. Business – Dividends and Retained Earnings” and “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital – Excess Stock Repurchase, Retained Earnings, and Dividend Framework.” in the Bank’s 2017 Form 10‑K.

Financial Condition

Total assets were $106.2 billion at June 30, 2018, compared to $123.4 billion at December 31, 2017. Advances decreased by $7.1 billion, or 9%, to $70.3 billion at June 30, 2018, from $77.4 billion at December 31, 2017. MBS decreased by $1.2 billion, or 7%, to $16.6 billion at June 30, 2018, from $17.8 billion at December 31, 2017. Average total assets were $108.5 billion for the second quarter of 2018, a 10% increase compared to $98.7 billion for the second quarter of 2017. Average total assets were $118.2 billion for the first six months of 2018, a 22% increase compared to $96.8 billion for the first six months of 2017. Average advances were $71.8 billion for the second quarter of 2018, a 9% increase from $65.8 billion for the second quarter of 2017. Average advances were $80.4 billion for the first six months of 2018, a 26% increase from $64.0 billion for the first six months of 2017. Average MBS were $16.6 billion for the second quarter of 2018, a 3% increase from $16.2 billion for the second quarter of 2017. Average MBS were $16.9 billion for the first six months of 2018, a 4% increase from $16.2 billion for the first six months of 2017.

Advances outstanding at June 30, 2018, included net unrealized losses of $239 million, of which $161 million represented unrealized losses on advances hedged in accordance with the accounting for derivative instruments and hedging activities and $78 million represented unrealized losses on economically hedged advances that are carried at fair value in accordance with the fair value option. Advances outstanding at December 31, 2017, included unrealized losses of $104 million, of which $88 million represented unrealized losses on advances hedged in accordance with the accounting for derivative instruments and hedging activities and $16 million represented unrealized losses on economically hedged advances that are carried at fair value in accordance with the fair value option. The overall increase in the unrealized losses on the hedged advances and advances carried at fair value from December 31, 2017, to June 30, 2018, was primarily attributable to the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors relative to the terms on the Bank’s advances during the period.

Total liabilities were $99.7 billion at June 30, 2018, a decrease of $16.9 billion from $116.6 billion at December 31, 2017, reflecting a $16.9 billion decrease in consolidated obligations outstanding to $98.6 billion at June 30, 2018, from $115.5 billion at December 31, 2017. Average total liabilities were $101.9 billion for the second quarter of 2018, a 10% increase compared to $92.9 billion for the second quarter of 2017. Average total liabilities were $111.5 billion for the first six months of 2018, a 22% increase compared to $91.1 billion for the first six months of 2017. Average consolidated obligations were $100.8 billion for the second quarter of 2018 and $91.4 billion for the second quarter of 2017. Average consolidated obligations were $110.3 billion for the first six months of 2018 and $89.7 billion for the first six months of 2017.

Consolidated obligations outstanding at June 30, 2018, included unrealized gains of $84 million on consolidated obligation bonds hedged in accordance with the accounting for derivative instruments and hedging activities and unrealized gains of $14 million on economically hedged consolidated obligation bonds that are carried at fair value in accordance with the fair value option. Consolidated obligations outstanding at December 31, 2017, included unrealized gains of $37 million on consolidated obligation bonds hedged in accordance with the accounting for derivative instruments and hedging activities and unrealized gains of $6 million on economically hedged consolidated obligation bonds that are carried at fair value in accordance with the fair value option. The increase in the net unrealized gains on the hedged consolidated obligation bonds and on the consolidated obligation bonds

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carried at fair value from December 31, 2017, to June 30, 2018, were primarily attributable to the effects of changes in market interest rates, interest rate spreads, interest rate volatility, and other market factors relative to the actual terms on the Bank's consolidated obligation bonds during the period.

As provided by the FHLBank Act or regulations governing the operations of the FHLBanks, all FHLBanks have joint and several liability for all FHLBank consolidated obligations. The joint and several liability regulation authorizes the Finance Agency to require any FHLBank to repay all or a portion of the principal or interest on consolidated obligations for which another FHLBank is the primary obligor. The Bank has never been asked or required to repay the principal or interest on any consolidated obligation on behalf of another FHLBank, and as of June 30, 2018, and through the filing date of this report, does not believe that it is probable that it will be asked to do so. The par value of the outstanding consolidated obligations of the FHLBanks was $1,059.9 billion at June 30, 2018, and $1,034.3 billion at December 31, 2017.

Changes in the long-term credit ratings of individual FHLBanks do not necessarily affect the credit rating of the consolidated obligations issued on behalf of the FHLBanks. Rating agencies may change or withdraw a rating from time to time because of various factors, including operating results or actions taken, business developments, or changes in their opinion regarding, among other factors, the general outlook for a particular industry or the economy.

The Bank does not believe, as of the date of this report, that it is probable that the Bank will be required to repay any principal or interest associated with consolidated obligations for which the Bank is not the primary obligor.

Segment Information

The Bank uses an analysis of financial results based on the financial components and adjusted net interest income of two operating segments, the advances-related business and the mortgage-related business, as well as other financial information, to review and assess financial performance and determine financial management strategies related to the operations of these two business segments. For purposes of segment reporting, adjusted net interest income includes income and expense associated with net settlements from economic hedges that are recorded in “Net gain/(loss) on derivatives and hedging activities” in other income and excludes interest expense that is recorded in “Mandatorily redeemable capital stock.” Other key financial information, such as any credit-related OTTI losses on the Bank’s PLRMBS, other expenses, and assessments, is not included in the segment reporting analysis, but is incorporated into the Bank’s overall assessment of financial performance. For a reconciliation of the Bank’s operating segment adjusted net interest income to the Bank’s total net interest income, see “Item 1. Financial Statements – Note 14 – Segment Information.”

Advances-Related Business. The advances-related business consists of advances and other credit products, related financing and hedging instruments, liquidity and other non-MBS investments associated with the Bank’s role as a liquidity provider, and capital. Assets associated with this segment decreased $16.6 billion to $86.8 billion (82% of total assets) at June 30, 2018, from $103.4 billion (84% of total assets) at December 31, 2017.

Adjusted net interest income for this segment is derived primarily from the difference, or spread, between the yield on advances and non-MBS investments and the cost of the consolidated obligations funding these assets, including the net settlements from associated interest rate exchange agreements, and from earnings on capital.

Adjusted net interest income for this segment was $79 million in the second quarter of 2018, an increase of $22 million, or 39%, compared to $57 million in the second quarter of 2017. In the first six months of 2018, adjusted net interest income for this segment was $157 million, an increase of $52 million, or 50%, compared to $105 million in the first six months of 2017. The increase was primarily due to an improvement in spreads and higher balances on advances-related assets, partially offset by lower earnings from non-MBS investments.

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Adjusted net interest income for this segment represented 52% and 41% of total adjusted net interest income for the second quarter of 2018 and 2017, and 51% and 39% of total adjusted net interest income for the first six months of 2018 and 2017, respectively.

Advances – The par value of advances outstanding decreased by $6.9 billion, or 9%, to $70.6 billion at June 30, 2018, from $77.5 billion at December 31, 2017. Average advances outstanding were $71.8 billion in the second quarter of 2018, a 9% increase from $65.8 billion in the second quarter of 2017. Average advances outstanding were $80.4 billion in the first six months of 2018, a 26% increase from $64.0 billion in the first six months of 2017. Outstanding balances of advances may significantly increase and decrease from period to period because of a member’s liquidity and financial strategies.

As of June 30, 2018, advances outstanding to the Bank’s top five borrowers and their affiliates decreased by $3.9 billion, and advances outstanding to the Bank’s other borrowers decreased by $3.0 billion. Advances to the top five borrowers decreased to $44.5 billion at June 30, 2018, from $48.4 billion at December 31, 2017. (See “Item 1. Financial Statements – Note 7 – Advances – Credit and Concentration Risk” for further information.)

The $6.9 billion decrease in advances outstanding reflected a $4.3 billion decrease in fixed rate advances, a $1.4 billion decrease in variable rate advances, and a $1.2 billion decrease in adjustable rate advances.

The components of the advances portfolio at June 30, 2018, and December 31, 2017, are presented in the following table.

Advances Portfolio by Product Type
	June 30, 2018				December 31, 2017
(Dollar in millions)	Par Value		Percentage of Total Par Value		Par Value		Percentage of Total Par Value
Adjustable – LIBOR	$	10,557	15	%	$	6,957	9	%
Adjustable – LIBOR, callable at borrower’s option	11,725		17		16,495		21
Adjustable – LIBOR, with caps and/or floors and PPS(1)	83		—		83		—
Adjustable – Other Indices	—		—		2		—
Subtotal adjustable rate advances	22,365		32		23,537		30
Fixed	34,180		49		38,242		50
Fixed – amortizing	202		—		210		—
Fixed – with PPS(1)	4,492		6		4,035		5
Fixed – with caps and PPS(1)	485		1		425		1
Fixed – callable at borrower’s option	1,052		1		1,802		2
Fixed – callable at borrower’s option with PPS(1)	39		—		75		—
Fixed – putable at Bank’s option with PPS(1)	10		—		—		—
Subtotal fixed rate advances	40,460		57		44,789		58
Daily variable rate	7,728		11		9,160		12
Total par value	$	70,553	100	%	$	77,486	100	%

(1) Partial prepayment symmetry (PPS) is a product feature under which the Bank may charge the borrower a prepayment fee or pay the borrower a prepayment credit, depending on certain circumstances, such as movements in interest rates, when the advance is prepaid. Any prepayment credit on an advance with PPS would be limited to the lesser of 10% of the par value of the advance or the gain recognized on the termination of the associated interest rate swap, which may also include a similar contractual gain limitation.

For a discussion of advances credit risk, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Credit Risk – Advances.”

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Non-MBS Investments – The Bank’s non-MBS investment portfolio consists of financial instruments that are used primarily to facilitate the Bank’s role as a cost-effective provider of credit and liquidity to members and to support the operations of the Bank. The Bank’s total non-MBS investment portfolio was $16.1 billion and $25.7 billion as of June 30, 2018, and December 31, 2017, respectively. The decrease in the total size of the non-MBS investment portfolio reflects lower balances of securities purchased under agreements to resell, agency securities, and Federal funds sold.

Interest rate payment terms for non-MBS investments classified as HTM at June 30, 2018, and December 31, 2017, are detailed in the following table:

Non-MBS Investments: Interest Rate Payment Terms
(In millions)	June 30, 2018		December 31, 2017
Amortized cost of HTM securities other than MBS:
Fixed rate	$	550	$	500
Adjustable rate	155		187
Total	$	705	$	687

Borrowings – Total liabilities (primarily consolidated obligations) funding the advances-related business decreased to $80.4 billion at June 30, 2018, from $96.6 billion at December 31, 2017. For further information and discussion of the Bank’s joint and several liability for FHLBank consolidated obligations, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Financial Condition” and “Item 1. Financial Statements – Note 17 – Commitments and Contingencies.”

To meet the specific needs of certain investors, fixed and adjustable rate consolidated obligation bonds may contain embedded call options or other features that result in complex coupon payment terms. When these consolidated obligation bonds are issued on behalf of the Bank, typically the Bank simultaneously enters into interest rate exchange agreements with features that offset the complex features of the bonds and, in effect, convert the bonds to adjustable rate instruments. For example, the Bank uses fixed rate callable bonds that are typically offset with interest rate exchange agreements with call features that offset the call options embedded in the callable bonds. This combined financing structure enables the Bank to meet its funding needs at costs not generally attainable solely through the issuance of comparable term non-callable debt.

At June 30, 2018, the notional amount of interest rate exchange agreements associated with the advances-related business totaled $70.8 billion, of which $38.4 billion were hedging advances, $31.8 billion were hedging consolidated obligations, $0.5 billion were economically hedging trading securities, and $0.1 billion were offsetting derivatives. At December 31, 2017, the notional amount of interest rate exchange agreements associated with the advances-related business totaled $95.5 billion, of which $44.3 billion were hedging advances, $50.4 billion were hedging consolidated obligations, $0.8 billion were economically hedging trading securities, and $14 million were offsetting derivatives. The hedges associated with advances and consolidated obligations were primarily used to convert the fixed rate cash flows of the advances and consolidated obligations to adjustable rate cash flows or to manage the interest rate sensitivity and net repricing gaps of assets, liabilities, and interest rate exchange agreements.

FHLBank System consolidated obligation bonds and discount notes, along with similar debt securities issued by other GSEs such as Fannie Mae and Freddie Mac, are generally referred to as agency debt. The costs of debt issued by the FHLBanks and the other GSEs generally rise and fall with increases and decreases in general market interest rates.

The following table presents a comparison of selected market interest rates as of June 30, 2018, and December 31, 2017. All selected market interest rates increased in 2018 compared to the prior yearend.

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Selected Market Interest Rates
Market Instrument	June 30, 2018		December 31, 2017		June 30, 2017		December 31, 2016
Federal Reserve target range for overnight Federal funds	1.75-2.00	%	1.25-1.50	%	1.00-1.25	%	0.50-0.75	%
3-month Treasury bill	1.88		1.36		1.01		0.50
3-month LIBOR	2.34		1.69		1.30		1.00
2-year Treasury note	2.53		1.89		1.38		1.19
5-year Treasury note	2.74		2.21		1.89		1.93

The following table presents a comparison of the average issuance cost of FHLBank System consolidated obligation bonds and discount notes converted to LIBOR-indexed liabilities through interest rate swaps in the first six months of 2018 and 2017. The average issuance cost relative to LIBOR of bonds improved while discount notes deteriorated in the first six months of 2018 compared to 2017.

	Spread to LIBOR of Average Cost of Consolidated Obligations for the Six Months Ended
(In basis points)	June 30, 2018	June 30, 2017
Consolidated obligation bonds	–28.4	–25.3
Consolidated obligation discount notes (one month and greater)	–28.0	–29.5

Mortgage-Related Business. The mortgage-related business consists of MBS investments, mortgage loans acquired through the Mortgage Partnership Finance® (MPF®) Program, and the related financing and hedging instruments. (“Mortgage Partnership Finance,” “MPF,” and “MPF Xtra” are registered trademarks of the FHLBank of Chicago.) Adjusted net interest income for this segment is derived primarily from the difference, or spread, between the yield on the MBS and mortgage loans and the cost of the consolidated obligations funding those assets, including the net settlements from associated interest rate exchange agreements.

At June 30, 2018, assets associated with this segment were $19.4 billion (18% of total assets), a decrease of $0.6 billion from $20.0 billion at December 31, 2017 (16% of total assets).

Adjusted net interest income for this segment was $73 million in the second quarter of 2018, a decrease of $8 million, or 10%, from $81 million in the second quarter of 2017. In the first six months of 2018, adjusted net interest income for this segment was $148 million, a decrease of $16 million, or 10%, from $164 million in the first six months of 2017. The decrease in adjusted net interest income was due to lower spreads on interest-earning assets, primarily caused by lower spreads on new investments, and lower accretion-related income, which more than offset the impact of higher average balances of MBS investments and mortgage loans.

Adjusted net interest income for this segment represented 48% and 59% of total adjusted net interest income for the second quarter of 2018 and 2017, and 49% and 61% of total adjusted net interest income for the first six months of 2018 and 2017, respectively.

MBS Investments – The Bank’s MBS portfolio was $16.6 billion at June 30, 2018, compared with $17.8 billion at December 31, 2017. During the first six months of 2018, the Bank’s MBS portfolio decreased primarily because of $1.9 billion in principal repayments, partially offset by $0.6 billion in new MBS investments. Average MBS investments were $16.6 billion in the second quarter of 2018, an increase of $0.4 billion from $16.2 billion in the second quarter of 2017. Average MBS investments were $16.9 billion in the first six months of 2018, an increase of $0.7 billion from $16.2 billion in the first six months of 2017. For a discussion of the composition of the Bank’s MBS portfolio and the Bank’s OTTI analysis of that portfolio, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Investments” and “Item 1. Financial Statements – Note 6 – Other-Than-Temporary Impairment Analysis.”

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Intermediate-term and long-term fixed rate MBS investments are subject to prepayment risk, and intermediate-term and long-term adjustable rate MBS investments are also subject to interest rate cap risk. The Bank has managed these risks predominately by purchasing intermediate-term fixed rate MBS (rather than long-term fixed rate MBS), funding the fixed rate MBS with a mix of non-callable and callable debt, and using interest rate exchange agreements with interest rate risk characteristics similar to callable debt. The Bank has purchased interest rate caps to hedge some of the interest rate cap risk associated with the long-term adjustable rate MBS investments.

Interest rate payment terms for MBS securities at June 30, 2018, and December 31, 2017, are shown in the following table:

MBS Investments: Interest Rate Payment Terms
(In millions)	June 30, 2018		December 31, 2017
Amortized cost of MBS:
Passthrough securities:
Fixed rate	$	23	$	26
Adjustable rate	2,216		2,406
Subtotal	2,239		2,432
Collateralized mortgage obligations:
Fixed rate	4,152		4,738
Adjustable rate	9,841		10,325
Subtotal	13,993		15,063
Total	$	16,232	$	17,495

Certain MBS classified as fixed rate passthrough securities and fixed rate collateralized mortgage obligations have an initial fixed interest rate that subsequently converts to an adjustable interest rate on a specified date as follows:

(In millions)	June 30, 2018		December 31, 2017
Passthrough securities:
Converts after 1 year through 5 years	$	21	$	24
Total	$	21	$	24

MPF Program – Under the MPF Program, the Bank may purchase from members, for its own portfolio, conventional conforming fixed rate mortgage loans under the MPF Original product and mortgage loans insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA) under the MPF Government product. In addition, the Bank may facilitate the purchase of conforming fixed rate mortgage loans from members for concurrent sale to Fannie Mae under the MPF Xtra product; of jumbo fixed rate mortgage loans for concurrent sale to Redwood Residential Acquisition Corporation, a subsidiary of Redwood Trust, Inc., a real estate investment trust, under the MPF Direct product; and of government-insured or government-guaranteed mortgage loans that will be packaged into securities backed by the mortgage loans and guaranteed by Ginnie Mae under the MPF Government MBS product. When members sell mortgage loans under the MPF Xtra, MPF Direct, and MPF Government MBS products, the loans are sold to a third-party investor and are not recorded on the Bank’s Statements of Condition.

From May 2002 through October 2006, the Bank purchased conventional conforming fixed rate mortgage loans from its participating financial institutions under the MPF Original and MPF Plus products. Participating members originated or purchased the mortgage loans, credit-enhanced them and sold them to the Bank, and generally retained the servicing of the loans.

As of June 30, 2018, all mortgage loans purchased by the Bank under the MPF Program were qualifying conventional conforming fixed rate, first lien mortgage loans with fully amortizing loan terms of up to 30 years. A conventional loan is one that is not insured by the federal government or any of its agencies. Conforming loan size, which is established annually as required by Finance Agency regulations, may not exceed the loan limits set by the

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Finance Agency each year. All MPF loans are secured by owner-occupied, one- to four-unit residential properties or single-unit second homes. The Bank purchased $777 million in eligible loans under the MPF Original product during the first six months of 2018.

Mortgage loan balances increased to $2.7 billion at June 30, 2018, from $2.1 billion at December 31, 2017, an increase of $0.6 billion. Average mortgage loans were $2.6 billion in the second quarter of 2018, an increase of $1.5 billion from $1.1 billion in the second quarter of 2017. Average mortgage loans were $2.4 billion in the first six months of 2018, an increase of $1.4 billion from $1.0 billion in the first six months of 2017.

At June 30, 2018, and December 31, 2017, the Bank held conventional conforming fixed rate mortgage loans purchased under one of two MPF products, MPF Plus or MPF Original, which are described in greater detail in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Credit Risk – MPF Program.” in the Bank’s 2017 Form 10-K. Mortgage loan balances at June 30, 2018, and December 31, 2017, were as follows:

Mortgage Loan Balances by MPF Product Type
(In millions)	June 30, 2018			December 31, 2017
MPF Plus	$	236		$	267
MPF Original	2,402			1,738
Subtotal	2,638			2,005
Unamortized premiums	95			76
Unamortized discounts	(5		)	(5		)
Mortgage loans held for portfolio	2,728			2,076
Less: Allowance for credit losses	—			—
Mortgage loans held for portfolio, net	$	2,728		$	2,076

The Bank performs periodic reviews of its mortgage loan portfolio to identify probable credit losses in the portfolio and to determine the likelihood of collection on the loans in the portfolio. For more information on the Bank’s mortgage loan portfolio, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Credit Risk – MPF Program” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates – Allowance for Credit Losses – Mortgage Loans Acquired Under the MPF Program.” in the Bank’s 2017 Form 10‑K.

Borrowings – Total consolidated obligations funding the mortgage-related business decreased $0.6 billion to $19.4 billion at June 30, 2018, from $20.0 billion at December 31, 2017, paralleling the decrease in MBS investments. For further information and discussion of the Bank’s joint and several liability for FHLBank consolidated obligations, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Financial Condition” and “Item 1. Financial Statements – Note 17 – Commitments and Contingencies.”

The notional amount of interest rate exchange agreements associated with the mortgage-related business totaled $4.7 billion at June 30, 2018, of which $3.2 billion were hedging or were associated with consolidated obligations funding the mortgage portfolio and $1.5 billion were associated with MBS. The notional amount of interest rate exchange agreements associated with the mortgage-related business totaled $4.1 billion at December 31, 2017, of which $2.6 billion were hedging or were associated with consolidated obligations funding the mortgage portfolio and $1.5 billion were associated with MBS.

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Interest Rate Exchange Agreements

A derivative transaction or interest rate exchange agreement is a financial contract whose fair value is generally derived from changes in the value of an underlying asset or liability. The Bank uses interest rate swaps; interest rate cap and floor agreements; and callable and putable interest rate swaps (collectively, interest rate exchange agreements) to manage its exposure to market risks inherent in its ordinary course of business, including its lending, investment, and funding activities. For more information on the primary strategies that the Bank employs for using interest rate exchange agreements and the associated market risks, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Market Risk – Interest Rate Exchange Agreements” in the Bank’s 2017 Form 10-K.

The following table summarizes the Bank’s interest rate exchange agreements by type of hedged item, hedging instrument, associated hedging strategy, accounting designation as specified under the accounting for derivative instruments and hedging activities, and notional amount as of June 30, 2018, and December 31, 2017.

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Interest Rate Exchange Agreements
(In millions)			Notional Amount
Hedging Instrument	Hedging Strategy	Accounting Designation	June 30, 2018		December 31, 2017
Hedged Item: Advances
Pay fixed, receive adjustable interest rate swap	Fixed rate advance converted to an adjustable rate	Fair Value Hedge	$	28,273	$	16,713
Basis swap	Adjustable rate advance converted to another adjustable rate index to reduce interest rate sensitivity and repricing gaps	Economic Hedge(1)	—		2
Received fixed, pay adjustable interest rate swap	Adjustable rate advance converted to a fixed rate	Economic Hedge(1)	2,097		1,972
Pay fixed, receive adjustable interest rate swap	Fixed rate advance converted to an adjustable rate	Economic Hedge(1)	1,847		19,401
Pay fixed, receive adjustable interest rate swap; swap may be callable at the Bank’s option or putable at the counterparty’s option	Fixed rate advance (with or without an embedded cap) converted to an adjustable rate; advance and swap may be callable or putable; matched to advance accounted for under the fair value option	Economic Hedge(1)	6,083		6,163
Interest rate cap or floor	Interest rate cap or floor embedded in an adjustable rate advance; matched to advance accounted for under the fair value option	Economic Hedge(1)	83		83
Subtotal Economic Hedges(1)			10,110		27,621
Total			38,383		44,334
Hedged Item: Non-Callable Bonds
Receive fixed or structured, pay adjustable interest rate swap	Fixed rate or structured rate non-callable bond converted to an adjustable rate	Fair Value Hedge	4,210		5,373
Receive fixed or structured, pay adjustable interest rate swap	Fixed rate or structured rate non-callable bond converted to an adjustable rate	Economic Hedge(1)	970		1,106
Receive fixed or structured, pay adjustable interest rate swap	Fixed rate or structured rate non-callable bond converted to an adjustable rate; matched to non-callable bond accounted for under the fair value option	Economic Hedge(1)	170		90
Basis swap	Fixed rate or adjustable rate non-callable bond previously converted to an adjustable rate index, converted to another adjustable rate index to reduce interest rate sensitivity and repricing gaps	Economic Hedge(1)	14,390		7,050
Pay fixed, receive adjustable interest rate swap	Fixed rate or adjustable rate non-callable bond, which may have been previously converted to an adjustable rate, converted to fixed rate debt that offsets the interest rate risk of mortgage assets	Economic Hedge(1)	—		4,620
Subtotal Economic Hedges(1)			15,530		12,866
Total			19,740		18,239

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Interest Rate Exchange Agreements (continued)
(In millions)			Notional Amount
Hedging Instrument	Hedging Strategy	Accounting Designation	June 30, 2018		December 31, 2017
Hedged Item: Callable Bonds
Receive fixed or structured, pay adjustable interest rate swap with an option to call at the counterparty’s option	Fixed or structured rate callable bond converted to an adjustable rate; swap is callable	Fair Value Hedge	2,370		2,184
Receive fixed or structured, pay adjustable interest rate swap with an option to call at the counterparty’s option	Fixed or structured rate callable bond converted to an adjustable rate; swap is callable	Economic Hedge(1)	3,522		3,357
Receive fixed or structured, pay adjustable interest rate swap with an option to call at the counterparty’s option	Fixed or structured rate callable bond converted to an adjustable rate; swap is callable; matched to callable bond accounted for under the fair value option	Economic Hedge(1)	1,249		865
Subtotal Economic Hedges(1)			4,771		4,222
Total			7,141		6,406
Hedged Item: Discount Notes
Pay fixed, receive adjustable callable interest rate swap	Discount note, which may have been previously converted to an adjustable rate, converted to fixed rate callable debt that offsets the prepayment risk of mortgage assets	Economic Hedge(1)	1,600		1,535
Basis swap or receive fixed, pay adjustable interest rate swap	Discount note converted to short-term adjustable rate to hedge repricing gaps	Economic Hedge(1)	5,908		26,435
Pay fixed, receive adjustable non-callable interest rate swap	Discount note, which may have been previously converted to an adjustable rate, converted to fixed rate non-callable debt that offsets the interest rate risk of mortgage assets	Economic Hedge(1)	610		400
Total			8,118		28,370
Hedged Item: Trading Securities
Basis swap	Basis swap hedging adjustable rate Federal Farm Credit Bank (FFCB) bonds	Economic Hedge(1)	500		750
Interest rate cap	Interest rate cap used to offset cap risk embedded in floating rate MBS	Economic Hedge(1)	1,480		1,480
Total			1,980		2,230
Hedged Item: Offsetting Derivatives
Pay fixed, receive adjustable interest rate swap and receive fixed, pay adjustable interest rate swap	Interest rate swap used to offset the economic effect of interest rate swap that is no longer designated to advances, investments, or consolidated obligations	Economic Hedge(1)	76		14
Total			76		14
Stand-Alone Derivatives
Mortgage delivery commitments	N/A	N/A	16		16
Total			16		16
Total Notional Amount			$	75,454	$	99,609

(1) Economic hedges are derivatives that are matched to balance sheet instruments or other derivatives that do not meet the requirements for hedge accounting under the accounting for derivative instruments and hedging activities.

The following tables categorize the notional amounts and estimated fair values of the Bank’s interest rate exchange agreements, unrealized gains and losses from the related hedged items, and estimated fair value gains and losses from financial instruments carried at fair value by type of accounting treatment and product as of June 30, 2018, and December 31, 2017.

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Interest Rate Exchange Agreements Notional Amounts and Estimated Fair Values
June 30, 2018
(In millions)	Notional Amount		Fair Value of Derivatives			Unrealized Gain/(Loss) on Hedged Items			Financial Instruments Carried at Fair Value			Difference
Fair value hedges:
Advances	$	28,273	$	(7	)	$	(161	)	$	—		$	(168	)
Non-callable bonds	4,210		(7		)	33			—			26
Callable bonds	2,370		(50		)	51			—			1
Subtotal	34,853		(64		)	(77		)	—			(141		)
Not qualifying for hedge accounting:
Advances	10,110		24			—			(92		)	(68		)
Non-callable bonds	15,530		6			—			—			6
Callable bonds	4,771		(77		)	—			19			(58		)
Discount notes	8,118		59			—			—			59
FFCB bonds	500		(1		)	—			—			(1		)
MBS	1,480		1			—			—			1
Mortgage delivery commitments	16		—			—			—			—
Offsetting derivatives	76		—			—			—			—
Subtotal	40,601		12			—			(73		)	(61		)
Total excluding accrued interest	75,454		(52		)	(77		)	(73		)	(202		)
Accrued interest	—		28			(13		)	8			23
Total	$	75,454	$	(24	)	$	(90	)	$	(65	)	$	(179	)

December 31, 2017
(In millions)	Notional Amount		Fair Value of Derivatives			Unrealized Gain/(Loss) on Hedged Items			Financial Instruments Carried at Fair Value			Difference
Fair value hedges:
Advances	$	16,713	$	85		$	(88	)	$	—		$	(3	)
Non-callable bonds	5,373		(23		)	24			—			1
Callable bonds	2,184		(12		)	13			—			1
Subtotal	24,270		50			(51		)	—			(1		)
Not qualifying for hedge accounting:
Advances	27,621		27			—			(28		)	(1		)
Non-callable bonds	12,866		—			—			(1		)	(1		)
Callable bonds	4,222		(29		)	—			10			(19		)
Discount notes	28,370		23			—			—			23
FFCB bonds	750		(1		)	—			—			(1		)
MBS	1,480		1			—			—			1
Mortgage delivery commitments	16		—			—			—			—
Offsetting derivatives	14		—			—			—			—
Subtotal	75,339		21			—			(19		)	2
Total excluding accrued interest	99,609		71			(51		)	(19		)	1
Accrued interest	—		18			(15		)	9			12
Total	$	99,609	$	89		$	(66	)	$	(10	)	$	13

Credit Risk. For a discussion of derivatives credit exposure, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Derivative Counterparties.”

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Concentration Risk. The following table presents the concentration in derivatives with derivative counterparties whose outstanding notional balances represented 10% or more of the Bank’s total notional amount of derivatives outstanding as of June 30, 2018, and December 31, 2017.

Concentration of Derivative Counterparties
(Dollars in millions)	June 30, 2018					December 31, 2017
Derivative Counterparty	Credit   Rating(1)	Notional Amount		Percentage of Total Notional Amount		Credit   Rating(1)	Notional Amount		Percentage of Total Notional Amount
Uncleared
Others	At least BBB	$	13,770	18	%	At least BBB	$	13,900	14	%
Subtotal uncleared		13,770		18			13,900		14
Cleared
LCH Ltd(2)
Credit Suisse Securities (USA) LLC	A	34,770		46		A	54,371		55
Morgan Stanley & Co. LLC	A	26,898		36		A	31,322		31
Subtotal cleared		61,668		82			85,693		86
Total(3)		$	75,438	100	%		$	99,593	100	%

(1) The credit ratings used by the Bank are based on the lower of Moody’s Investors Service (Moody’s) or S&P Global Ratings (S&P) ratings. 

(2) London Clearing House (LCH) Ltd is the Bank’s counterparty for all of its cleared swaps. For purposes of clearing swaps with LCH Ltd, Credit Suisse Securities (USA) LLC and Morgan Stanley & Co. LLC are the Bank’s clearing agents. LCH Ltd’s parent, LCH Group Holdings Limited, was rated A+ by S&P. On May 31, 2017, S&P lowered the rating to A and withdrew the rating at LCH Group Holdings Limited’s request. LCH Ltd’s ultimate parent, London Stock Exchange Group, plc., is rated A3 by Moody’s and A- by S&P.

(3) Total notional amount at June 30, 2018, and December 31, 2017, does not include $16 million and $16 million of mortgage delivery commitments with members, respectively.

Liquidity and Capital Resources

The Bank’s financial strategies are designed to enable the Bank to safely expand and contract its assets, liabilities, and capital as membership composition and member credit needs change. The Bank’s liquidity and capital resources are designed to support its financial strategies. The Bank’s primary source of liquidity is its access to the debt capital markets through consolidated obligation issuance. The maintenance of the Bank’s capital resources is governed by its capital plan.

Liquidity

The Bank strives to maintain the liquidity necessary to repay maturing consolidated obligations for which it is the primary obligor, meet other obligations and commitments, and meet expected and unexpected member credit demands. The Bank monitors its financial position in order to maintain ready access to sufficient liquid funds to meet normal transaction requirements, take advantage of appropriate investment opportunities, and cover unforeseen liquidity demands.

The Bank generally manages operational, contingent, and structural liquidity risks using a portfolio of cash and short-term investments and access to the debt capital markets. In addition, the Bank maintains alternate sources of funds, detailed in its contingent liquidity plan, which also includes an explanation of how sources of funds may be allocated under stressed market conditions, such as short-term operational disruptions at the Bank or the Office of Finance or short-term disruptions in the debt capital markets. The Bank maintains short-term, high-quality money market investments and government and agency securities in amounts that may average up to three times the Bank’s capital as a primary source of funds to satisfy these requirements and objectives.

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The Bank has a regulatory contingent liquidity requirement to maintain at least 5 business days of liquidity to enable it to meet its obligations without issuance of new consolidated obligations. In addition, the Finance Agency has established liquidity guidelines that require each FHLBank to maintain sufficient on-balance sheet liquidity in an amount at least equal to its anticipated cash outflows for two different scenarios. Both scenarios assume no new consolidated obligation issuance and no reliance on repurchase agreements and permit the sale of certain existing investments as determined by the Finance Agency. The two scenarios differ only in the treatment of maturing advances. One scenario assumes that the Bank does not renew any maturing advances. For this scenario, the Bank must have sufficient liquidity to meet its obligations for 15 calendar days. The second scenario requires the Bank to renew maturing advances for certain members based on specific criteria established by the Finance Agency. For this scenario, the Bank must have sufficient liquidity to meet its obligations for 5 calendar days.

In addition to the regulatory contingent liquidity requirement and the Finance Agency’s guidelines on contingent liquidity, the Bank models its cash commitments and expected cash flows on a daily basis to determine its projected liquidity position. If a market or operational disruption occurred that prevented the issuance of new consolidated obligations, the Bank could meet its obligations by: (i) allowing short-term liquid investments to mature, (ii) using eligible securities as collateral for repurchase agreement borrowings, and (iii) if necessary, allowing advances to mature without renewal. In addition, the Bank may be able to borrow on a short-term unsecured basis from other financial institutions (Federal funds purchased) or other FHLBanks (inter-FHLBank borrowings).

The Bank actively monitors and manages structural liquidity risks, which the Bank defines as maturity mismatches greater than 90 days for sources and uses of funds, of the advances business segment. Structural liquidity maturity mismatches are identified using maturity gap analysis and valuation sensitivity metrics that quantify the risk associated with the Bank’s structural liquidity position.

The following table shows the Bank’s principal financial obligations due, estimated sources of funds available to meet those obligations, and the net difference between funds available and funds needed for the 5-business-day period following June 30, 2018, and December 31, 2017.

Principal Financial Obligations Due and Funds Available for Selected Period
	As of June 30, 2018		As of December 31, 2017
(In millions)	5 Business Days		5 Business Days
Obligations due:
Demand deposits	$	468	$	299
Discount note and bond maturities and expected exercises of bond call options	2,669		3,950
Subtotal obligations due	3,137		4,249
Sources of available funds:
Maturing investments	12,893		21,613
Available cash	41		27
Proceeds from scheduled settlements of discount notes and bonds	57		635
Maturing advances and scheduled prepayments	6,867		7,854
Subtotal sources of available funds	19,858		30,129
Net funds available	$	16,721	$	25,880

For more information, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital Resources – Liquidity” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Liquidity Risk” in the Bank’s 2017 Form 10‑K.

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Regulatory Capital Requirements

The FHLBank Act and Finance Agency regulations specify that each FHLBank must meet certain minimum regulatory capital standards. The Bank must maintain: (i) total regulatory capital in an amount equal to at least 4% of its total assets, (ii) leverage capital in an amount equal to at least 5% of its total assets, and (iii) permanent capital in an amount that is greater than or equal to its risk-based capital requirement. Because the Bank issues only Class B stock, regulatory capital and permanent capital for the Bank are both composed of retained earnings and Class B stock, including mandatorily redeemable capital stock (which is classified as a liability for financial reporting purposes). Regulatory capital and permanent capital do not include AOCI. Leverage capital is defined as the sum of permanent capital weighted by a 1.5 multiplier plus non-permanent capital. The risk-based capital requirement is equal to the sum of the Bank’s credit risk, market risk, and operations risk capital requirements, all of which are calculated in accordance with the rules and regulations of the Finance Agency.

The following table shows the Bank’s compliance with the Finance Agency’s capital requirements at June 30, 2018, and December 31, 2017.  

Regulatory Capital Requirements
	June 30, 2018						December 31, 2017
(Dollars in millions)	Required			Actual			Required			Actual
Risk-based capital	$	2,022		$	6,424		$	2,023		$	6,797
Total regulatory capital	4,248			6,424			4,935			6,797
Total regulatory capital ratio	4.00		%	6.05		%	4.00		%	5.51		%
Leverage capital	$	5,310		$	9,636		$	6,169		$	10,195
Leverage ratio	5.00		%	9.07		%	5.00		%	8.26		%

The Bank repurchased $1,128 million in excess capital stock during the first six months of 2018. As a result of changes in the Bank’s capital plan, both capital stock and retained earnings are required to support regulatory capital compliance.

On April 9, 2018, the Bank’s Board of Directors revised the Framework to change the Bank’s practice of repurchasing the surplus capital stock of all members and the excess capital stock of all former members from a quarterly schedule to a daily schedule. Surplus capital stock is defined as any stock holdings in excess of 115% of a member’s minimum stock requirement. Effective April 24, 2018, the Bank began calculating the amount of stock to be repurchased each business day based on the shareholder’s capital stock outstanding after all stock transactions are completed for the day, ensuring that each member and former member will continue to meet its minimum capital stock requirement after the repurchase. In accordance with the revised Framework, the Bank repurchased $363 million of excess capital stock on April 24, 2018. The Bank may change this practice at any time. All repurchases of capital stock are at the Bank’s discretion, subject to certain statutory and regulatory requirements and to the Bank’s Risk Management Policy, Capital Plan, and the Framework.

The Bank’s capital requirements are more fully discussed in “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 10-K.

Risk Management

The Bank has an integrated corporate governance and internal control framework designed to support effective management of the Bank’s business activities and the risks inherent in these activities. As part of this framework, the Bank’s Board of Directors has adopted a Risk Governance Policy that outlines the key roles and responsibilities of the Board of Directors and management and sets forth how the Bank is organized to achieve its risk management objectives, including the implementation of the Bank’s strategic objectives, risk management strategies, corporate governance, and standards of conduct. The policy also establishes the Bank’s risk governance organizational structure and identifies the general roles and responsibilities of the Board of Directors and management in

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establishing risk management policies, procedures, and guidelines; in overseeing the enterprise risk profile; and in implementing enterprise risk management processes and business strategies. The policy establishes an independent risk oversight function to identify, assess, measure, monitor, and report on the enterprise risk profile and risk management capabilities of the Bank. For more information, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management” in the Bank’s 2017 Form 10-K.

Advances. The Bank manages the credit risk of advances and other credit products by setting the credit and collateral terms available to individual members and housing associates based on their creditworthiness and on the quality and value of the assets they pledge as collateral. The Bank also has procedures to assess the mortgage loan quality and documentation standards of institutions that pledge mortgage loan collateral. In addition, the Bank has collateral policies and restricted lending procedures in place to help manage its exposure to institutions that experience difficulty in meeting their capital requirements or other standards of creditworthiness. These credit and collateral policies balance the Bank’s dual goals of meeting the needs of members and housing associates as a reliable source of liquidity and mitigating credit risk by adjusting credit and collateral terms in view of deterioration in creditworthiness. The Bank has never experienced a credit loss on an advance.

The Bank determines the maximum amount and maximum term of the advances it will make to a member or housing associate based on the institution’s creditworthiness and eligible collateral pledged in accordance with the Bank’s credit and collateral policies and regulatory requirements. The Bank may review and change the maximum amount and maximum term at any time. The maximum amount a member or housing associate may borrow is also limited by the amount and type of collateral pledged because all advances must be fully collateralized.

To identify the credit strength of each borrower and potential borrower, other than insurance companies, community development financial institutions (CDFIs), and housing associates, the Bank assigns each member and each nonmember borrower an internal credit quality rating from one to ten, with one as the highest credit quality rating. These ratings are based on results from the Bank’s credit model, which considers financial, regulatory, and other qualitative information, including regulatory examination reports. The internal ratings are reviewed on an ongoing basis using current available information and are revised, if necessary, to reflect the institution’s current financial position. Credit and collateral terms may be adjusted based on the results of this credit analysis.

The Bank determines the maximum amount and maximum term of the advances it will make to an insurance company based on an ongoing risk assessment that considers the member's financial and regulatory standing and other qualitative information deemed relevant by the Bank. This evaluation results in the assignment of an internal credit quality rating from one to ten, with one as the highest credit quality rating. Approved terms are designed to meet the needs of the individual member while mitigating the unique credit and collateral risks associated with insurance companies, including risks related to the resolution process for insurance companies, which is significantly different from the resolution processes established for the Bank’s insured depository members.

The Bank determines the maximum amount and maximum term of the advances it will make to a CDFI based on an ongoing risk assessment that considers information from the CDFI’s audited annual financial statements, supplemented by additional information deemed relevant by the Bank. Approved terms are designed to meet the needs of the individual member while mitigating the unique credit and collateral risks of CDFIs, which do not file quarterly regulatory financial reports and are not subject to the same inspection and regulation requirements as the Bank’s insured depository members.

The Bank determines the maximum amount and maximum term of the advances it will make to a housing associate based on an ongoing risk assessment that considers the housing associate’s financial and regulatory standing and other qualitative information deemed relevant by the Bank. Approved terms are designed to meet the needs of the individual housing associate while mitigating the unique credit and collateral risks of housing associates, which do not file quarterly regulatory financial reports and are not subject to the same inspection and regulation requirements as the Bank’s insured depository members.

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Pursuant to the Bank’s lending agreements with its borrowers, the Bank limits extensions of credit to individual borrowers to a percentage of the market value or unpaid principal balance of the borrower’s pledged collateral, known as the borrowing capacity. The borrowing capacity percentage varies according to several factors, including the charter type of the institution, the collateral type, the value assigned to the collateral, the results of the Bank’s collateral field review of the borrower’s collateral, the pledging method used for loan collateral (specific identification or blanket lien), the amount of loan data provided (detailed or summary reporting), the data reporting frequency (monthly or quarterly), the borrower’s financial strength and condition, and any institution-specific collateral risks. Under the terms of the Bank’s lending agreements, the aggregate borrowing capacity of a borrower’s pledged eligible collateral must meet or exceed the total amount of the borrower’s outstanding advances, other extensions of credit, and certain other borrower obligations and liabilities. The Bank monitors each borrower’s aggregate borrowing capacity and collateral requirements on a daily basis by comparing the institution’s borrowing capacity to its obligations to the Bank.

In addition, the total amount of advances made available to each member or housing associate may be limited by the financing availability assigned by the Bank, which is generally expressed as a percentage of the member’s or housing associate’s assets. The amount of financing availability is generally determined by the creditworthiness of the member or housing associate.

When a nonmember financial institution acquires some or all of the assets and liabilities of a member, including outstanding advances and Bank capital stock, the Bank may allow the advances to remain outstanding, at its discretion. The nonmember borrower is required to meet the Bank’s applicable credit, collateral, and capital stock requirements, including requirements regarding creditworthiness and collateral borrowing capacity.

The following tables present a summary of the status of the credit outstanding and overall collateral borrowing capacity of the Bank’s member and nonmember borrowers as of June 30, 2018, and December 31, 2017. During the six months ended June 30, 2018, the Bank’s internal credit ratings stayed the same or improved for the majority of members and nonmember borrowers.

Member and Nonmember Credit Outstanding and Collateral Borrowing Capacity by Credit Quality Rating
(Dollars in millions)
June 30, 2018
	All Members and Nonmembers	Members and Nonmembers with Credit Outstanding
					Collateral Borrowing Capacity(2)
Member or Nonmember Credit Quality Rating	Number	Number	Credit Outstanding(1)		Total		Used
1-3	271	162	$	81,695	$	227,502	36	%
4-6	55	27	5,556		17,863		31
7-10	4	3	10		68		15
Subtotal	330	192	87,261		245,433		36
CDFIs	7	4	88		98		90
Housing associates	2	1	109		113		96
Total	339	197	$	87,458	$	245,644	36	%

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December 31, 2017
	All Members and Nonmembers	Members and Nonmembers with Credit Outstanding
					Collateral Borrowing Capacity(2)
Member or Nonmember Credit Quality Rating	Number	Number	Credit Outstanding(1)		Total		Used
1-3	265	155	$	84,257	$	240,247	35	%
4-6	58	25	9,255		22,005		42
7-10	4	1	—		25		—
Subtotal	327	181	93,512		262,277		36
CDFIs	6	4	78		99		79
Housing associates	2	1	107		112		96
Total	335	186	$	93,697	$	262,488	36	%

(1) Includes advances, letters of credit, the market value of swaps, estimated prepayment fees for certain borrowers, and the credit enhancement obligation on MPF loans.

(2) Collateral borrowing capacity does not represent any commitment to lend on the part of the Bank.

Member and Nonmember Credit Outstanding and Collateral Borrowing Capacity by Unused Borrowing Capacity
(Dollars in millions)
June 30, 2018
Unused Borrowing Capacity	Number of Members and Nonmembers with Credit Outstanding	Credit Outstanding(1)		Collateral Borrowing Capacity(2)
0% – 10%	4	$	368	$	396
11% – 25%	6	640		775
26% – 50%	30	35,712		58,049
More than 50%	157	50,738		186,424
Total	197	$	87,458	$	245,644

December 31, 2017
Unused Borrowing Capacity	Number of Members and Nonmembers with Credit Outstanding	Credit Outstanding(1)		Collateral Borrowing Capacity(2)
0% – 10%	4	$	160	$	169
11% – 25%	4	553		672
26% – 50%	35	33,571		54,487
More than 50%	143	59,413		207,160
Total	186	$	93,697	$	262,488

(1) Includes advances, letters of credit, the market value of swaps, estimated prepayment fees for certain borrowers, and the credit enhancement obligation on MPF loans.

(2) Collateral borrowing capacity does not represent any commitment to lend on the part of the Bank.

Based on the collateral pledged as security for advances, the Bank’s credit analyses of borrowers’ financial condition, and the Bank’s credit extension and collateral policies, the Bank expects to collect all amounts due according to the contractual terms of the advances. Therefore, no allowance for credit losses on advances is deemed necessary by the Bank. The Bank has never experienced any credit losses on advances.

Securities pledged as collateral are assigned borrowing capacities that reflect the securities’ pricing volatility and market liquidity risks. Securities are delivered to the Bank’s custodian when they are pledged. The Bank prices securities collateral on a daily basis or twice a month, depending on the availability and reliability of external pricing sources. Securities that are normally priced twice a month may be priced more frequently in volatile market conditions. The Bank benchmarks the borrowing capacities for securities collateral to the market on a periodic basis and may review and change the borrowing capacity for any security type at any time. As of June 30, 2018, the

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borrowing capacities assigned to U.S. Treasury and agency securities ranged from 80% to 99% of their market value. The borrowing capacities assigned to private-label MBS, which must be rated AAA or AA when initially pledged, generally ranged from 65% to 90% of their market value, depending on the underlying collateral (residential mortgage loans, home equity loans, or commercial real estate loans), the rating, and the subordination structure of the respective securities.

The following table presents the securities collateral pledged by all members and by nonmembers with credit outstanding at June 30, 2018, and December 31, 2017.

Composition of Securities Collateral Pledged by Members and by Nonmembers with Credit Outstanding
(In millions)	June 30, 2018				December 31, 2017
Securities Type with Current Credit Ratings	Current Par		Borrowing Capacity		Current Par		Borrowing Capacity
U.S. Treasury (bills, notes, bonds)	$	2,201	$	2,124	$	1,946	$	1,875
Agency (notes, subordinated debt, structured notes, indexed amortization notes, and Small Business Administration pools)	3,043		2,948		3,135		3,019
Agency pools and collateralized mortgage obligations	9,614		9,003		34,182		32,755
Private-label commercial MBS – publicly registered investment-grade-rated senior tranches	3		3		3		2
PLRMBS – private placement investment-grade-rated senior tranches	62		45		68		51
Municipal Bonds – investment-grade-rated	50		44		55		49
Term deposits with the Bank	2		2		—		—
Total	$	14,975	$	14,169	$	39,389	$	37,751

With respect to loan collateral, most borrowers may choose to pledge loan collateral by specific identification or under a blanket lien. Insurance companies, CDFIs, and housing associates are required to pledge loan collateral by specific identification with monthly reporting. All other borrowers pledging by specific identification must provide a detailed listing of all the loans pledged to the Bank on a monthly basis. With a blanket lien, a borrower generally pledges the following loan types, whether or not the individual loans are eligible to receive borrowing capacity: all loans secured by real estate; all loans made for commercial, corporate, or business purposes; and all participations in these loans. Borrowers pledging under a blanket lien may provide a detailed listing of loans or may use a summary reporting method.

The Bank may require certain borrowers to deliver pledged loan collateral to the Bank for one or more reasons, including the following: the borrower is a de novo institution (chartered within the last three years), an insurance company, a CDFI, or a housing associate; the Bank is concerned about the borrower’s creditworthiness; or the Bank is concerned about the maintenance of its collateral or the priority of its security interest. With the exception of insurance companies, CDFIs, and housing associates, borrowers required to deliver loan collateral must pledge those loans under a blanket lien with detailed reporting.

As of June 30, 2018, of the loan collateral pledged to the Bank, 25% was pledged by 26 institutions by specific identification, 50% was pledged by 125 institutions under a blanket lien with detailed reporting, and 25% was pledged by 126 institutions under a blanket lien with summary reporting.

As of June 30, 2018, the Bank’s maximum borrowing capacities as a percentage of the assigned market value of mortgage loan collateral pledged under a blanket lien with detailed reporting were as follows: 90% for first lien residential mortgage loans, 88% for multifamily mortgage loans, 88% for commercial mortgage loans, and 77% for second lien residential mortgage loans. The maximum borrowing capacity for small business, small agribusiness, and small farm loans was 50% of the unpaid principal balance, although most of these loans are pledged under blanket lien with summary reporting, with a maximum borrowing capacity of 25%. The highest borrowing capacities are available to borrowers that pledge under a blanket lien with detailed reporting because the detailed

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loan information allows the Bank to assess the value of the collateral more precisely and because additional collateral is pledged under the blanket lien that may not receive borrowing capacity but may be liquidated to repay advances in the event of default. The Bank may review and change the maximum borrowing capacity for any type of loan collateral at any time.

The table below presents the mortgage loan collateral pledged by all members and by nonmembers with credit outstanding at June 30, 2018, and December 31, 2017.

Composition of Loan Collateral Pledged by Members and by Nonmembers with Credit Outstanding
(In millions)	June 30, 2018				December 31, 2017
Loan Type	Unpaid Principal Balance		Borrowing Capacity		Unpaid Principal Balance		Borrowing Capacity
First lien residential mortgage loans	$	163,281	$	137,518	$	162,740	$	138,937
Second lien residential mortgage loans and home equity lines of credit	19,696		10,714		22,440		12,500
Multifamily mortgage loans	30,222		22,920		26,143		20,098
Commercial mortgage loans	79,462		56,346		68,703		48,759
Loan participations(1)	4,259		3,032		4,793		3,487
Small business, small farm, and small agribusiness loans	3,804		945		3,830		956
Other	—		—		2		—
Total	$	300,724	$	231,475	$	288,651	$	224,737

(1) The unpaid principal balance for loan participations is 100% of the outstanding loan amount. The borrowing capacity for loan participations is based on the participated amount pledged to the Bank.

The Bank holds a security interest in subprime residential mortgage loans pledged as collateral. Subprime loans are defined as loans with a borrower FICO score of 660 or less at origination, or if the original FICO score is not available, as loans with a current borrower FICO score of 660 or less. At June 30, 2018, and December 31, 2017, the unpaid principal balance of these loans totaled $9 billion and $9 billion, respectively. The Bank reviews and assigns borrowing capacities to subprime mortgage loans as it does for all other types of loan collateral, taking into account the known credit attributes in the pricing of the loans. All advances, including those made to borrowers pledging subprime mortgage loans, are required to be fully collateralized. The Bank limits the amount of borrowing capacity that may be supported by subprime collateral.

Investments. The Bank has adopted credit policies and exposure limits for investments that promote risk limitation, diversification, and liquidity. These policies determine eligible counterparties and restrict the amounts and terms of the Bank’s investments with any given counterparty according to the Bank’s own capital position as well as the capital and creditworthiness of the counterparty.

The Bank monitors its investments for substantive changes in relevant market conditions and any declines in fair value. For securities in an unrealized loss position because of factors other than movements in interest rates, such as widening of mortgage asset spreads, the Bank considers whether it expects to recover the entire amortized cost basis of the security by comparing the best estimate of the present value of the cash flows expected to be collected from the security with the amortized cost basis of the security. If the Bank’s best estimate of the present value of the cash flows expected to be collected is less than the amortized cost basis, the difference is considered the credit loss.

When the fair value of an individual investment security falls below its amortized cost, the Bank evaluates whether the decline is other than temporary. The Bank recognizes an OTTI when it determines that it will be unable to recover the entire amortized cost basis of the security and the fair value of the investment security is less than its amortized cost. The Bank considers its intent to hold the security and whether it is more likely than not that the Bank will be required to sell the security before its anticipated recovery of the remaining cost basis, and other

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factors. The Bank generally views changes in the fair value of the securities caused by movements in interest rates to be temporary.

The following tables present the Bank’s investment credit exposure at the dates indicated, based on the lowest of the long-term credit ratings provided by Moody’s, S&P, or comparable Fitch Ratings (Fitch) ratings.

Investment Credit Exposure
(In millions)
June 30, 2018
	Carrying Value
	Credit Rating(1)
Investment Type	AAA		AA		A		BBB		Below Investment Grade		Unrated		Total
Non-MBS
Certificates of deposit	$	—	$	—	$	550	$	—	$	—	$	—	$	550
Housing finance agency bonds:
CalHFA bonds	—		—		155		—		—		—		155
GSEs:
FFCB bonds	—		657		—		—		—		—		657
Total non-MBS	—		657		705		—		—		—		1,362
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	—		683		—		—		—		—		683
GSEs – single-family:
Freddie Mac	—		1,760		—		—		—		—		1,760
Fannie Mae(2)	—		3,087		7		—		4		—		3,098
Subtotal	—		4,847		7		—		4		—		4,858
GSEs – multifamily:
Freddie Mac	—		4,855		—		—		—		—		4,855
Fannie Mae	—		1,993		—		—		—		—		1,993
Subtotal	—		6,848		—		—		—		—		6,848
Total GSEs	—		11,695		7		—		4		—		11,706
PLRMBS:
Prime	—		2		7		177		463		117		766
Alt-A, option ARM	—		—		—		7		762		—		769
Alt-A, other	—		20		21		74		2,192		348		2,655
Total PLRMBS	—		22		28		258		3,417		465		4,190
Total MBS	—		12,400		35		258		3,421		465		16,579
Total securities	—		13,057		740		258		3,421		465		17,941
Interest-bearing deposits	—		25		2,010		—		—		—		2,035
Securities purchased under agreements to resell	—		4,000		—		—		—		—		4,000
Federal funds sold(3)	—		3,946		4,781		—		—		—		8,727
Total investments	$	—	$	21,028	$	7,531	$	258	$	3,421	$	465	$	32,703

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(In millions)
December 31, 2017
	Carrying Value
	Credit Rating(1)
Investment Type	AAA		AA		A		BBB		Below Investment Grade		Unrated		Total
Non-MBS
Certificates of deposit	$	—	$	—	$	500	$	—	$	—	$	—	$	500
Housing finance agency bonds:
CalHFA bonds	—		—		187		—		—		—		187
GSEs:
FFCB bonds	—		1,158		—		—		—		—		1,158
Total non-MBS	—		1,158		687		—		—		—		1,845
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	—		757		—		—		—		—		757
GSEs – single-family:
Freddie Mac	—		2,039		—		—		—		—		2,039
Fannie Mae(2)	—		3,588		7		—		5		—		3,600
Subtotal	—		5,627		7		—		5		—		5,639
GSEs – multifamily:
Freddie Mac	—		4,651		—		—		—		—		4,651
Fannie Mae	—		2,131		—		—		—		—		2,131
Subtotal	—		6,782		—		—		—		—		6,782
Total GSEs	—		12,409		7		—		5		—		12,421
PLRMBS:
Prime	—		—		12		200		642		31		885
Alt-A, option ARM	—		—		—		—		834		—		834
Alt-A, other	2		13		12		57		2,549		302		2,935
Total PLRMBS	2		13		24		257		4,025		333		4,654
Total MBS	2		13,179		31		257		4,030		333		17,832
Total securities	2		14,337		718		257		4,030		333		19,677
Interest-bearing deposits	—		40		1,075		—		—		—		1,115
Securities purchased under agreements to resell	—		11,750		—		—		—		—		11,750
Federal funds sold(3)	—		5,283		5,745		—		—		—		11,028
Total investments	$	2	$	31,410	$	7,538	$	257	$	4,030	$	333	$	43,570

(1) Credit ratings of BB and lower are below investment grade.

(2) The Bank has one security guaranteed by Fannie Mae but rated D by S&P because of extraordinary expenses incurred during bankruptcy of the security's sponsor.

(3) Includes $146 million and $225 million at June 30, 2018, and December 31, 2017, respectively, in Federal funds sold to a member counterparty determined by the Bank to have an internal credit rating equivalent to an AA rating.

For all securities in its AFS and HTM portfolios, for Federal funds sold, and for securities purchased under agreements to resell, the Bank does not intend to sell any security and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

The Bank invests in short-term unsecured interest-bearing deposits, short-term unsecured Federal funds sold, securities purchased under agreements to resell, and negotiable certificates of deposit with member and nonmember counterparties, all of which are highly rated.

The Bank actively monitors its credit exposures and the credit quality of its counterparties, including an assessment of each counterparty’s financial performance, capital adequacy, likelihood of parental or sovereign support, and the current market perceptions of the counterparties. The Bank may also consider general macroeconomic and market

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conditions and political stability when establishing limits on unsecured investments with U.S. branches and agency offices of foreign commercial banks. As a result of deteriorating financial condition or concerns about adverse economic or market developments, the Bank may reduce limits or terms on unsecured investments or suspend a counterparty.

Finance Agency regulations limit the amount of unsecured credit that an individual FHLBank may extend to a single counterparty. This limit is calculated with reference to a percentage of either the FHLBank’s or the counterparty’s capital and to the counterparty’s overall credit rating. Under these regulations, the lesser of the FHLBank’s total regulatory capital or the counterparty’s Tier 1 capital is multiplied by a percentage specified in the regulation. The percentages used to determine the maximum amount of term extensions of unsecured credit range from 1% to 15%, depending on the counterparty’s overall credit rating. Term extensions of unsecured credit include on-balance sheet transactions, off-balance sheet commitments, and derivative transactions, but exclude overnight Federal funds sales, even if subject to a continuing contract. (See “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Risk Management – Derivative Counterparties” for additional information related to derivatives exposure.)

Finance Agency regulations also permit the FHLBanks to extend additional unsecured credit to the same single counterparty for overnight sales of Federal funds, even if subject to a continuing contract. However, an FHLBank’s total unsecured credit to a single counterparty (total term plus additional overnight Federal funds unsecured credit) may not exceed twice the regulatory limit for term exposures (2% to 30% of the lesser of the FHLBank’s total regulatory capital or the counterparty’s Tier 1 capital, based on the counterparty’s overall credit rating). In addition, the FHLBanks are prohibited by Finance Agency regulation from investing in financial instruments issued by non-U.S. entities other than those issued by U.S. branches and agency offices of foreign commercial banks.

Under Finance Agency regulations, the total amount of unsecured credit that an FHLBank may extend to a group of affiliated counterparties for term extensions of unsecured credit and overnight Federal funds sales, combined, may not exceed 30% of the FHLBank’s total capital. These limits on affiliated counterparty groups are in addition to the limits on extensions of unsecured credit applicable to any single counterparty within the affiliated group.

The following table presents the unsecured credit exposure with counterparties by investment type at June 30, 2018, and December 31, 2017.

Unsecured Investment Credit Exposure by Investment Type
	Carrying Value(1)
(In millions)	June 30, 2018		December 31, 2017
Interest-bearing deposits	$	2,035	$	1,115
Certificates of deposit	550		500
Federal funds sold	8,727		11,028
Total	$	11,312	$	12,643

(1) Excludes unsecured investment credit exposure to U.S. government agencies and instrumentalities, government-sponsored enterprises, and supranational entities and does not include related accrued interest as of June 30, 2018, and December 31, 2017.

The following table presents the credit ratings of the unsecured investment credit exposures presented by the domicile of the counterparty or the domicile of the counterparty’s parent for U.S. branches and agency offices of foreign commercial banks, based on the lowest of the credit ratings provided by Moody’s, S&P, or comparable Fitch ratings. This table does not reflect the foreign sovereign government’s credit rating. At June 30, 2018, 35% of the carrying value of unsecured investments held by the Bank were rated AA, and 81% of the Bank’s total unsecured investments were to U.S. branches and agency offices of foreign commercial banks.

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Ratings of Unsecured Investment Credit Exposure by Domicile of Counterparty
(In millions)
June 30, 2018
	Carrying Value(1)
	Credit Rating(2)
Domicile of Counterparty	AA		A		Total
Domestic(3)	$	171	$	2,010	$	2,181
U.S. subsidiaries of foreign commercial banks	—		—		—
Total domestic and U.S. subsidiaries of foreign commercial banks	171		2,010		2,181
U.S. branches and agency offices of foreign commercial banks:
Australia	1,400		—		1,400
Austria	—		266		266
Canada	—		2,140		2,140
France	—		500		500
Japan	—		965		965
Netherlands	—		925		925
Singapore	1,200		—		1,200
Sweden	1,200		—		1,200
Switzerland	—		535		535
Total U.S. branches and agency offices of foreign commercial banks	3,800		5,331		9,131
Total unsecured credit exposure	$	3,971	$	7,341	$	11,312

(1) Excludes unsecured investment credit exposure to U.S. government agencies and instrumentalities, government-sponsored enterprises, and supranational entities and does not include related accrued interest as of June 30, 2018.

(2) Does not reflect changes in ratings, outlook, or watch status occurring after June 30, 2018. These ratings represent the lowest rating available for each unsecured investment owned by the Bank, based on the ratings provided by Moody’s, S&P, or comparable Fitch ratings. The Bank’s internal rating may differ from this rating.

(3) Includes $146 million at June 30, 2018, in Federal funds sold to a member counterparty determined by the Bank to have an internal credit rating equivalent to an AA rating.

The following table presents the contractual maturity of the Bank’s unsecured investment credit exposure by the domicile of the counterparty or the domicile of the counterparty’s parent for U.S. branches and agency offices of foreign commercial banks. At June 30, 2018, 73% of the carrying value of unsecured investments held by the Bank had overnight maturities.

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Contractual Maturity of Unsecured Investment Credit Exposure by Domicile of Counterparty
(In millions)
June 30, 2018
	Carrying Value(1)
Domicile of Counterparty	Overnight		Due 2 Days Through 30 Days		Due 31 Days Through 90 Days		Total
Domestic	$	2,181	$	—	$	—	$	2,181
U.S. subsidiaries of foreign commercial banks	—		—		—		—
Total domestic and U.S. subsidiaries of foreign commercial banks	2,181		—		—		2,181
U.S. branches and agency offices of foreign commercial banks:
Australia	1,100		—		300		1,400
Austria	266		—		—		266
Canada	1,740		150		250		2,140
France	500		—		—		500
Japan	—		550		415		965
Netherlands	925		—		—		925
Singapore	400		—		800		1,200
Sweden	1,200		—		—		1,200
Switzerland	—		—		535		535
Total U.S. branches and agency offices of foreign commercial banks	6,131		700		2,300		9,131
Total unsecured credit exposure	$	8,312	$	700	$	2,300	$	11,312

(1) Excludes unsecured investment credit exposure to U.S. government agencies and instrumentalities, government-sponsored enterprises, and supranational entities and does not include related accrued interest as of June 30, 2018.

The Bank’s investments may also include housing finance agency bonds issued by housing finance agencies located in Arizona, California, and Nevada, the three states that make up the Bank’s district. These bonds are federally taxable mortgage revenue bonds, collateralized by pools of first lien residential mortgage loans and credit-enhanced by bond insurance. The bonds held by the Bank are issued by the California Housing Finance Agency (CalHFA) and insured by either National Public Financial Guarantee (formerly MBIA Insurance Corporation), or Assured Guaranty Municipal Corporation (formerly Financial Security Assurance Incorporated). At June 30, 2018, all of the bonds were rated at least A by Moody’s or S&P.

For the Bank’s investments in housing finance agency bonds, which were issued by CalHFA, the gross unrealized losses were mainly due to an illiquid market, credit concerns regarding the underlying mortgage collateral, and credit concerns regarding the monoline insurance providers, causing these investments to be valued at a discount to their acquisition cost. The Bank independently modeled cash flows for the underlying collateral, using assumptions for default rates and loss severity that a market participant would deem reasonable, and concluded that the available credit support within the CalHFA structure more than offset the projected underlying collateral losses. The Bank determined that, as of June 30, 2018, all of the gross unrealized losses on the CalHFA bonds are temporary because the underlying collateral and credit enhancements were sufficient to protect the Bank from losses. As a result, the Bank expects to recover the entire amortized cost basis of these securities. If conditions in the housing and mortgage markets and general business and economic conditions deteriorate, the fair value of the CalHFA bonds may decline further and the Bank may experience OTTI in future periods.

The Bank’s MBS investments include PLRMBS, all of which were AAA-rated at the time of purchase, and agency residential MBS, which are backed by Fannie Mae, Freddie Mac, or Ginnie Mae. Some of the PLRMBS were issued by and/or purchased from members, former members, or their affiliates. The Bank has investment credit limits and terms for these investments that do not differ for members and nonmembers. Regulatory policy limits total MBS investments to three times the Bank’s capital at the time of purchase. At June 30, 2018, the Bank’s MBS

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portfolio was 253% of Bank capital (as determined in accordance with regulations governing the operations of the FHLBanks). The Bank has not purchased any PLRMBS since the first quarter of 2008.

The Bank executes all MBS investments without preference to the status of the counterparty or the issuer of the investment as a nonmember, member, or affiliate of a member. When the Bank executes non-MBS investments with members, the Bank may give consideration to their secured credit availability and the Bank’s advances price levels.

At June 30, 2018, PLRMBS representing 19% of the amortized cost of the Bank’s MBS portfolio were labeled Alt-A by the issuer. These PLRMBS are generally collateralized by mortgage loans that are considered less risky than subprime loans but more risky than prime loans. These loans are generally made to borrowers with credit scores that are high enough to qualify for a prime mortgage loan, but the loans may not meet standard underwriting guidelines for documentation requirements, property type, or loan-to-value ratios.

As of June 30, 2018, the Bank’s investment in MBS had gross unrealized losses totaling $97 million, $31 million of which were related to PLRMBS. These gross unrealized losses were primarily due to illiquidity in the MBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost.

For its agency MBS, the Bank expects to recover the entire amortized cost basis of these securities because the Bank determined that the strength of the issuers’ guarantees through direct obligations or support from the U.S. government is sufficient to protect the Bank from losses. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on its agency MBS are temporary.

To assess whether it expects to recover the entire amortized cost basis of its PLRMBS, the Bank performed a cash flow analysis for all of its PLRMBS as of June 30, 2018, using two third-party models. The FHLBanks’ OTTI Committee developed a short-term housing price forecast with projected changes ranging from a decrease of 8.0% to an increase of 13.0% over the 12-month period beginning April 1, 2018. For the vast majority of markets, the projected short-term housing price changes range from an increase of 2.0% to an increase of 7.0%. Thereafter, a unique path is projected for each geographic area based on an internally developed framework derived from historical data.

The projected cash flows are based on a number of assumptions and expectations, and the results of these models can vary significantly with changes in assumptions and expectations. The scenario of cash flows determined reflects a best-estimate scenario and includes a base case housing price forecast that reflects the expectations for near- and long-term housing price behavior.

In addition to evaluating its PLRMBS under a base case (or best estimate) scenario, the Bank performed a cash flow analysis for each of these securities under a more adverse housing price scenario. This more adverse scenario was primarily based on a short-term housing price forecast that was five percentage points below the base case forecast, followed by a recovery path with annual rates of housing price growth that were 33.0% lower than the base case.

The following table shows the base case scenario and what the credit-related OTTI loss would have been under the more adverse housing price scenario at June 30, 2018:

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OTTI Analysis Under Base Case and Adverse Case Scenarios
	Housing Price Scenario
	Base Case						Adverse Case
(Dollars in millions)	Number of Securities	Unpaid Principal Balance		Credit- Related OTTI(1)			Number of Securities	Unpaid Principal Balance		Credit- Related OTTI(1)
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Alt-A, option ARM	1	$	50	$	—		1	$	50	$	—
Alt-A, other	11	348		(5		)	13	374		(6		)
Total	12	$	398	$	(5	)	14	$	424	$	(6	)

(1) Amounts are for the three months ended June 30, 2018.

For more information on the Bank’s OTTI analysis and reviews, see “Item 1. Financial Statements – Note 6 – Other-Than-Temporary Impairment Analysis.”

The following table presents the ratings of the Bank’s PLRMBS as of June 30, 2018, by collateral type at origination and by year of securitization.

Unpaid Principal Balance of PLRMBS by Year of Securitization and Credit Rating
(In millions)
June 30, 2018
	Unpaid Principal Balance
	Credit Rating(1)
Collateral Type at Origination and Year of Securitization	AA		A		BBB		Below Investment Grade		Unrated		Total
Prime
2008	$	—	$	—	$	—	$	93	$	—	$	93
2007	—		—		—		118		131		249
2006	—		—		—		24		—		24
2005	—		—		12		30		—		42
2004 and earlier	2		7		164		216		2		391
Total Prime	2		7		176		481		133		799
Alt-A, option ARM
2007	—		—		—		617		—		617
2006	—		—		—		120		—		120
2005	—		—		7		115		—		122
Total Alt-A, option ARM	—		—		7		852		—		859
Alt-A, other
2008	—		—		—		68		—		68
2007	—		—		—		640		209		849
2006	—		—		—		231		128		359
2005	—		—		—		1,266		63		1,329
2004 and earlier	20		21		73		198		5		317
Total Alt-A, other	20		21		73		2,403		405		2,922
Total par value	$	22	$	28	$	256	$	3,736	$	538	$	4,580

(1) The credit ratings used by the Bank are based on the lowest of Moody’s, S&P, or comparable Fitch ratings. Credit ratings of BB and lower are below investment grade.

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The following table presents the ratings of the Bank’s other-than-temporarily impaired PLRMBS at June 30, 2018, by collateral type at origination and by year of securitization.

Unpaid Principal Balance of Other-Than-Temporarily Impaired PLRMBS by Year of Securitization and Credit Rating
(In millions)
June 30, 2018
	Unpaid Principal Balance
	Credit Rating(1)
Collateral Type at Origination and Year of Securitization	AA		BBB		Below Investment Grade		Unrated		Total
Prime
2008	$	—	$	—	$	87	$	—	$	87
2007	—		—		88		131		219
2006	—		—		9		—		9
2005	—		—		14		—		14
2004 and earlier	2		—		25		—		27
Total Prime	2		—		223		131		356
Alt-A, option ARM
2007	—		—		617		—		617
2006	—		—		120		—		120
2005	—		7		115		—		122
Total Alt-A, option ARM	—		7		852		—		859
Alt-A, other
2008	—		—		68		—		68
2007	—		—		640		209		849
2006	—		—		231		128		359
2005	—		—		1,266		64		1,330
2004 and earlier	3		8		117		3		131
Total Alt-A, other	3		8		2,322		404		2,737
Total par value	$	5	$	15	$	3,397	$	535	$	3,952

(1) The credit ratings used by the Bank are based on the lowest of Moody’s, S&P, or comparable Fitch ratings. Credit ratings of BB and lower are below investment grade.

For the Bank’s PLRMBS, the following table shows the amortized cost, estimated fair value, credit- and non-credit-related OTTI, performance of the underlying collateral based on the classification at the time of origination, and credit enhancement statistics by type of collateral and year of securitization. Credit enhancement is defined as the percentage of subordinated tranches and over-collateralization, if any, in a security structure that will absorb losses before the Bank will experience a loss on the security, expressed as a percentage of the underlying collateral balance. The credit enhancement figures include the additional credit enhancement required by the Bank (above the amounts required for an AAA rating by the credit rating agencies) for selected securities starting in late 2004, and for all securities starting in late 2005. The calculated weighted averages represent the dollar-weighted averages of all the PLRMBS in each category shown. The classification (prime or Alt-A) is based on the model used to run the estimated cash flows for the security, which may not necessarily be the same as the classification at the time of origination.

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PLRMBS Credit Characteristics
(Dollars in millions)
June 30, 2018
																Underlying Collateral Performance and Credit Enhancement Statistics
Collateral Type at Origination and Year of Securitization	Amortized Cost		Gross Unrealized Losses(2)			Estimated Fair Value		Total OTTI(1)			Non- Credit- Related OTTI(1)		Credit- Related OTTI(1)			Weighted Average 60+ Days Collateral Delinquency Rate		Original Weighted Average Credit Support		Current Weighted Average Credit Support
Prime
2008	$	78	$	—		$	89	$	—		$	—	$	—		16.04	%	30.00	%	9.60	%
2007	208		(2		)	219		—			—		—			14.87		22.96		2.28
2006	20		—			22		—			—		—			12.78		12.31		4.31
2005	41		—			42		—			—		—			7.70		11.85		16.44
2004 and earlier	390		(2		)	394		—			—		—			6.97		4.57		14.44
Total Prime	737		(4		)	766		—			—		—			10.70		13.87		9.89
Alt-A, option ARM
2007	506		(7		)	569		—			—		—			16.73		44.25		12.36
2006	91		—			111		(1		)	1		—			13.92		44.93		3.68
2005	42		—			89		—			—		—			14.45		22.75		4.99
Total Alt-A, option ARM	639		(7		)	769		(1		)	1		—			16.02		41.28		10.10
Alt-A, other
2008	65		—			66		—			—		—			7.00		31.80		21.64
2007	716		(9		)	753		(14		)	8		(6		)	16.83		26.92		7.39
2006	258		—			319		—			—		—			16.69		18.39		0.54
2005	1,121		(9		)	1,207		(1		)	1		—			11.26		14.42		3.76
2004 and earlier	312		(2		)	318		—			—		—			9.82		8.34		19.26
Total Alt-A, other	2,472		(20		)	2,663		(15		)	9		(6		)	13.29		18.28		6.52
Total	$	3,848	$	(31	)	$	4,198	$	(16	)	$	10	$	(6	)	13.35	%	21.83	%	7.78	%

(1) Amounts are for the year ended June 30, 2018.

(2) Represents total gross unrealized losses, including non-credit-related other-than-temporary impairment recognized in AOCI. The unpaid principal balance of Prime, Alt-A, option ARM, and Alt-A, other in a gross unrealized loss position was $186 million, $163 million, and $566 million, respectively, at June 30, 2018, and the amortized cost of Prime, Alt-A, option ARM, and Alt-A, other in a gross unrealized loss position was $186 million, $144 million, and $520 million, respectively, at June 30, 2018.

The following table presents a summary of the significant inputs used to determine potential OTTI credit losses in the Bank’s PLRMBS portfolio at June 30, 2018.

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Significant Inputs to OTTI Credit Analysis for All PLRMBS
June 30, 2018
	Significant Inputs			Current
	Prepayment Rates	Default Rates	Loss Severities	Credit Enhancement
Year of Securitization	Weighted Average %	Weighted Average %	Weighted Average %	Weighted Average %
Prime
2008	15.4	13.0	32.5	14.7
2007	13.4	3.9	21.2	8.9
2006	13.2	8.8	22.7	6.8
2005	20.0	4.1	19.7	12.8
2004 and earlier	20.5	4.7	21.5	13.4
Total Prime	18.4	7.0	24.5	13.3
Alt-A, option ARM
2007	8.6	32.6	41.8	12.5
2006	7.9	33.2	38.2	3.6
2005	9.0	23.7	35.5	5.0
Total Alt-A, option ARM	8.6	31.4	40.4	10.2
Alt-A, other
2007	12.3	22.2	38.5	3.6
2006	11.1	23.5	39.3	6.6
2005	14.5	18.0	35.0	4.0
2004 and earlier	19.0	10.7	30.7	19.5
Total Alt-A, other	13.8	19.3	36.3	6.2
Total	13.4	20.0	35.6	7.8

Credit enhancement is defined as the subordinated tranches and over-collateralization, if any, in a security structure that will generally absorb losses before the Bank will experience a loss on the security, expressed as a percentage of the underlying collateral balance. The calculated averages represent the dollar-weighted averages of all the PLRMBS investments in each category shown. The classification (prime or Alt-A) is based on the model used to run the estimated cash flows for the security, which may not necessarily be the same as the classification at the time of origination.

The following table presents the fair value of the Bank’s PLRMBS as a percentage of the unpaid principal balance by collateral type at origination and year of securitization.

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Fair Value of PLRMBS as a Percentage of Unpaid Principal Balance by Year of Securitization
Collateral Type at Origination and Year of Securitization	June 30, 2018		March 31, 2018		December 31, 2017		September 30, 2017		June 30, 2017
Prime
2008	96.51	%	96.04	%	96.89	%	96.60	%	92.68	%
2007	87.96		86.73		86.40		86.17		83.80
2006	93.78		93.40		93.86		93.98		93.21
2005	99.97		100.36		100.58		100.02		99.55
2004 and earlier	100.65		100.78		100.47		100.21		99.70
Weighted average of all Prime	95.97		95.69		95.65		95.44		94.14
Alt-A, option ARM
2007	92.23		91.46		90.43		90.00		87.34
2006	92.89		92.83		91.66		89.62		86.82
2005	72.71		70.79		68.99		65.67		62.10
Weighted average of all Alt-A, option ARM	89.54		88.76		87.53		86.46		83.66
Alt-A, other
2008	97.49		97.03		97.22		96.70		94.73
2007	88.62		89.69		89.07		88.80		87.38
2006	88.99		88.55		87.40		87.02		85.55
2005	90.77		90.83		90.44		90.35		88.96
2004 and earlier	100.31		100.60		100.47		100.21		99.54
Weighted average of all Alt-A, other	91.12		91.46		90.98		90.80		89.60
Weighted average of all PLRMBS	91.67	%	91.71	%	91.18	%	90.84	%	89.36	%

The Bank determined that, as of June 30, 2018, the gross unrealized losses on the PLRMBS that have not had an OTTI loss are primarily due to illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost. The Bank does not intend to sell these securities, it is not more likely than not that the Bank will be required to sell these securities before its anticipated recovery of the remaining amortized cost basis, and the Bank expects to recover the entire amortized cost basis of these securities. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on these securities are temporary. The Bank will continue to monitor and analyze the performance of these securities to assess the likelihood of the recovery of the entire amortized cost basis of these securities as of each balance sheet date.

If conditions in the housing and mortgage markets and general business and economic conditions deteriorate, the fair value of MBS may decline further and the Bank may experience OTTI of additional PLRMBS in future periods, as well as further impairment of PLRMBS that were identified as other-than-temporarily impaired as of June 30, 2018. Additional future credit-related OTTI losses could adversely affect the Bank’s earnings and retained earnings and its ability to pay dividends and repurchase capital stock. The Bank cannot predict whether it will be required to record additional credit-related OTTI losses on its PLRMBS in the future.

Derivative Counterparties. The Bank has also adopted credit policies and exposure limits for uncleared derivatives credit exposure. Over-the-counter derivatives may be either entered into directly with a counterparty (uncleared derivatives) or executed either with an executing dealer or on a swap execution facility and then cleared through a futures commission merchant (clearing agent) with a derivatives clearing organization (cleared derivatives).

Uncleared Derivatives. The Bank selects only highly rated derivative dealers and major banks (derivative dealer counterparties) that meet the Bank’s eligibility criteria to act as counterparties for its uncleared derivative activities. In addition, for all uncleared derivative transactions, the Bank has entered into master netting agreements and bilateral credit support agreements with all active derivative dealer counterparties that provide for delivery of

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collateral at specified levels to limit the Bank’s net unsecured credit exposure to these counterparties. Under these policies and agreements, the amount of unsecured credit exposure to an individual derivative dealer counterparty is set at zero (subject to a minimum transfer amount).

The Bank is subject to the risk of potential nonperformance by the counterparties to derivative agreements. A counterparty generally must deliver collateral to the Bank if the total market value of the Bank’s exposure to that counterparty rises above a specific trigger point. Currently, all of the Bank’s active uncleared derivative counterparties have a zero threshold. As a result of these risk mitigation initiatives, the Bank does not anticipate any credit losses on its uncleared derivative transactions with counterparties as of June 30, 2018.

Cleared Derivatives. The Bank is subject to nonperformance by the derivatives clearing organizations (clearinghouses) and clearing agents. The requirement that the Bank post initial and variation margin through a clearing agent, to the clearinghouse, exposes the Bank to institutional credit risk in the event that the clearing agent or the clearinghouse fails to meet its obligations. The use of cleared derivatives, however, mitigates the Bank’s overall credit risk exposure because a central counterparty is substituted for individual counterparties. Variation margin and initial margin are posted for changes in the value and risk profile of cleared derivatives. The Bank does not anticipate any credit losses on its cleared derivatives as of June 30, 2018.

The following table presents the Bank’s credit exposure to its derivative dealer counterparties at the dates indicated.

Credit Exposure to Derivative Dealer Counterparties
(In millions)
June 30, 2018
Counterparty Credit Rating(1)	Notional Amount		Net Fair Value of Derivatives Before Collateral			Cash Collateral Pledged to/ (from) Counterparty			Net Credit Exposure to Counterparties
Asset positions with credit exposure:
Uncleared derivatives
A	$	2,911	$	32		$	(30	)	$	2
Liability positions with credit exposure:
Uncleared derivatives
A	1,995		(11		)	11			—
Cleared derivatives(2)	61,668		(1		)	140			139
Total derivative positions with credit exposure to nonmember counterparties	66,574		20			121			141
Member institutions(3)	16		—			—			—
Total	66,590		$	20		$	121		$	141
Derivative positions without credit exposure	8,864
Total notional	$	75,454

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December 31, 2017
Counterparty Credit Rating(1)	Notional Amount		Net Fair Value of Derivatives Before Collateral			Cash Collateral Pledged to/ (from) Counterparty			Net Credit Exposure to Counterparties
Asset positions with credit exposure:
Uncleared derivatives
A	$	4,879	$	7		$	(5	)	$	2
Cleared derivatives(2)	85,692		83			(2		)	81
Liability positions with credit exposure:
Uncleared derivatives
AA	300		(1		)	1			—
A	638		—			—			—
BBB	1,641		(1		)	1			—
Total derivative positions with credit exposure to nonmember counterparties	93,150		88			(5		)	83
Member institutions(3)	16		—			—			—
Total	93,166		$	88		$	(5	)	$	83
Derivative positions without credit exposure	6,443
Total notional	$	99,609

(1) The credit ratings used by the Bank are based on the lower of Moody's or S&P ratings.

(2) Represents derivative transactions cleared with LCH Ltd, the Bank’s clearinghouse, which is not rated. LCH Ltd’s parent, LCH Group Holdings Limited, was rated A+ by S&P. On May 31, 2017, S&P lowered the rating to A and withdrew the rating at LCH Group Holdings Limited’s request. LCH Ltd’s ultimate parent, London Stock Exchange Group, plc., is rated A3 by Moody’s and A- by S&P.

(3) Member institutions include mortgage delivery commitments with members.

The increase or decrease in the credit exposure net of cash collateral, from one period to the next, may be affected by changes in several variables, such as the size and composition of the portfolio, market values of derivatives, and accrued interest.

Based on the master netting arrangements, its credit analyses, and the collateral requirements in place with each counterparty, the Bank does not expect to incur any credit losses on its derivative agreements.

Critical Accounting Policies and Estimates

The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make a number of judgments, estimates, and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, if applicable, and the reported amounts of income, expenses, gains, and losses during the reporting period. Changes in these judgments, estimates, and assumptions could potentially affect the Bank’s financial position and results of operations significantly. Although the Bank believes these judgments, estimates, and assumptions to be reasonably accurate, actual results may differ.

In the Bank’s 2017 Form 10-K, the following accounting policies and estimates were identified as critical because they require the Bank to make subjective or complex judgments about matters that are inherently uncertain and because of the likelihood that materially different amounts would be reported under different conditions or using different assumptions. These policies and estimates are: estimating the allowance for credit losses on the advances and mortgage loan portfolios; accounting for derivatives; estimating fair values of investments classified as trading and AFS, derivatives and associated hedged items carried at fair value in accordance with the accounting for derivative instruments and associated hedging activities, and financial instruments carried at fair value under the fair value option; accounting for other-than-temporary impairment for investment securities; and estimating the prepayment speeds on MBS and mortgage loans for the accounting of amortization of premiums and accretion of discounts on MBS and mortgage loans.

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There have been no significant changes in the judgments and assumptions made during the first six months of 2018 in applying the Bank’s critical accounting policies. These policies and the judgments, estimates, and assumptions are also described in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates” and “Item 8. Financial Statements and Supplementary Data – Note 1 – Summary of Significant Accounting Policies” in the Bank’s 2017 Form 10-K and in “Item 1. Financial Statements – Note 16 – Fair Value.”

Recently Issued Accounting Guidance and Interpretations

See “Item 1. Financial Statements – Note 2 – Recently Issued and Adopted Accounting Guidance” for a discussion of recently issued accounting standards and interpretations.

Recent Developments

Adoption of Single-Counterparty Credit Limits for Bank Holding Companies and Foreign Banking Organizations by Board of Governors of the Federal Reserve System. On June 14, 2018, the Board of Governors of the Federal Reserve System voted to pass a final rule establishing single-counterparty credit limits applicable to bank holding companies and foreign banking organizations with total consolidated assets of $250 billion or more, including global systemically important bank holding companies in the United States. These entities are considered to be “covered companies” under the rule. The FHLBanks are exempt from the limits and reporting requirements contained in this rule, however, credit exposure to individual FHLBanks must be monitored, and reported on as required, by any entity that is a covered company under this rule.

Under the final rule, a covered company and its subsidiaries may not have aggregate net credit exposure to an FHLBank and, in certain cases, economically interdependent entities in excess of 25% of the company’s Tier 1 capital. Such credit exposure does not include advances from an FHLBank but generally includes collateral pledged to an FHLBank in excess of a covered company’s outstanding advances. The following items are also included towards a covered company’s net credit exposure: its investment in FHLBank capital stock and consolidated obligations, deposits with an FHLBank, FHLBank-issued letters of credit where a covered company is the named beneficiary, and other obligations to an FHLBank, including repurchase or reverse repurchase transactions net of collateral that create a credit exposure to an FHLBank. Intraday exposures are exempt from the final rule.

With respect to the FHLBanks’ consolidated obligations held by a covered company, the company must monitor, and report on as required, its credit exposure for such obligations. It is not clear if the Federal Reserve will require consolidated obligations to be aggregated with other exposures to an FHLBank or the FHLBank System.

The final rule gives major covered companies (i.e., the global systemically important bank holding companies) until January 1, 2020, to comply. All other covered companies will have until July 1, 2020, to comply.

The Bank is continuing to study the overall effect of the rule, but does not believe it will materially affect its financial condition or results of operations.

Annual Designation of Member Director and Independent Director Positions. On June 6, 2018, the Finance Agency designated one member director position for Arizona, six for California, and one for Nevada, effective January 1, 2019, the same allocation of positions as for 2018. In addition, the Finance Agency designated seven independent director positions for the Bank for 2019, the same number of positions as for 2018. The Arizona member director position, one of the California member director positions, and one of the independent director positions designated as a public interest director position, all with current terms ending December 31, 2018, will be filled through an election of the members located in Arizona (for the Arizona member director position), an election of members located in California (for the California member director position), and an election of all members of the Bank (for the public interest independent director position). The elections will be held in the fourth quarter of 2018. The Arizona and California member director positions and the public interest independent director position will each have a four-year term that begins on January 1, 2019.

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Off-Balance Sheet Arrangements and Other Commitments

In accordance with regulations governing the operations of the FHLBanks, each FHLBank, including the Bank, is jointly and severally liable for the FHLBank System’s consolidated obligations issued under Section 11(a) of the FHLBank Act, and in accordance with the FHLBank Act, each FHLBank, including the Bank, is jointly and severally liable for consolidated obligations issued under Section 11(c) of the FHLBank Act. The joint and several liability regulation authorizes the Finance Agency to require any FHLBank to repay all or a portion of the principal or interest on consolidated obligations for which another FHLBank is the primary obligor.

The par value of the outstanding consolidated obligations of the FHLBanks was $1,059.9 billion at June 30, 2018, and $1,034.3 billion at December 31, 2017. The par value of the Bank’s participation in consolidated obligations was $98.7 billion at June 30, 2018, and $115.6 billion at December 31, 2017. The Bank had committed to the issuance of $57 million and $729 million in consolidated obligations at June 30, 2018, and December 31, 2017, respectively.

In addition, in the ordinary course of business, the Bank engages in financial transactions that, in accordance with U.S. GAAP, are not recorded on the Bank’s Statement of Condition or may be recorded on the Bank’s Statement of Condition in amounts that are different from the full contract or notional amount of the transactions. For example, the Bank routinely enters into commitments to extend advances and issues standby letters of credit. These commitments and standby letters of credit may represent future cash requirements of the Bank, although the standby letters of credit usually expire without being drawn upon. Standby letters of credit are subject to the same underwriting and collateral requirements as advances made by the Bank. At June 30, 2018, the Bank had no advance commitments and $16.8 billion in standby letters of credit outstanding. At December 31, 2017, the Bank had $1 million in advance commitments and $16.2 billion in standby letters of credit outstanding.

For additional information, see “Item 1. Financial Statements – Note 17 – Commitments and Contingencies.”

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is defined as the risk to the Bank's market value of capital and future earnings (excluding the impact of any cumulative net gains or losses on derivatives and associated hedged items and on financial instruments carried at fair value) as a result of movements in market interest rates, interest rate spreads, interest rate volatility, and other market factors (market rate factors). This profile reflects the Bank’s objective of maintaining a conservative asset-liability mix and its commitment to providing value to its members through products and dividends without subjecting their investments in Bank capital stock to significant market risk.

The Bank’s Risk Management Policy includes a market risk management objective aimed at maintaining a relatively low adverse exposure of the market value of capital and future earnings (excluding the impact of any cumulative net gains or losses on derivatives and associated hedged items and on financial instruments carried at fair value) to changes in market rate factors. See “Total Bank Market Risk” below.

Market risk identification and measurement are primarily accomplished through market value of capital sensitivity analyses and projected earnings and adjusted return on capital sensitivity analyses. The Risk Management Policy approved by the Bank’s Board of Directors establishes market risk policy limits and market risk measurement standards at the total Bank level as well as at the business segment level. Additional guidelines approved by the Bank’s Enterprise Risk Committee apply to the Bank’s two business segments, the advances-related business and the mortgage-related business. These guidelines provide limits that are monitored at the segment level and are consistent with the Bank’s policy limits. Market risk is managed for each business segment on a daily basis, as discussed below in “Segment Market Risk.” Compliance with Bank policies and guidelines is reviewed by the Bank’s Board of Directors on a regular basis, along with a corrective action plan if applicable.

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Total Bank Market Risk

Market Value of Capital Sensitivity

The Bank uses market value of capital sensitivity (the interest rate sensitivity of the net fair value of all assets, liabilities, and interest rate exchange agreements) as an important measure of the Bank’s exposure to changes in interest rates.

The Bank’s market value of capital sensitivity policy limits the potential adverse impact of an instantaneous parallel shift of a plus or minus 100-basis-point change in interest rates from current rates (base case) to no worse than –4.0% of the estimated market value of capital. In addition, the policy limits the potential adverse impact of an instantaneous plus or minus 100-basis-point change in interest rates measured from interest rates that are 200 basis points above or below the base case to no worse than –6.0% of the estimated market value of capital. In the case where a market risk sensitivity compliance metric cannot be estimated with a parallel shift in interest rates because of prevailing low interest rates, the sensitivity metric is not reported. The Bank’s measured market value of capital sensitivity was within the policy limits as of June 30, 2018.

To determine the Bank’s estimated risk sensitivities to interest rates for the market value of capital sensitivity, the Bank uses a third-party proprietary asset and liability system to calculate estimated market values under alternative interest rate scenarios. The system analyzes all of the Bank’s financial instruments, including derivatives, on a transaction-level basis using sophisticated valuation models with consistent and appropriate behavioral assumptions and current position data. The system also includes a third-party mortgage prepayment model.

At least annually, the Bank reexamines the major assumptions and methodologies used in the model, including interest rate curves, spreads for discounting, and mortgage prepayment assumptions. The Bank also compares the mortgage prepayment assumptions in the third-party model to other sources, including actual mortgage prepayment history.

The table below presents the sensitivity of the market value of capital (the market value of all of the Bank’s assets, liabilities, and associated interest rate exchange agreements, with mortgage assets valued using market spreads implied by current market prices) to changes in interest rates. The table presents the estimated percentage change in the Bank’s market value of capital that would be expected to result from changes in interest rates under different interest rate scenarios, using market spread assumptions. 

Market Value of Capital Sensitivity Estimated Percentage Change in Market Value of Bank Capital for Various Changes in Interest Rates
Interest Rate Scenario(1)	June 30, 2018		December 31, 2017
+200 basis-point change above current rates	–3.1	%	–3.8	%
+100 basis-point change above current rates	–1.3		–1.7
–100 basis-point change below current rates(2)	+0.6		+2.0
–200 basis-point change below current rates(2)	+2.1		+5.0

(1) Instantaneous change from actual rates at dates indicated.

(2) Interest rates for each maturity are limited to non-negative interest rates.

The Bank’s estimates of the sensitivity of the market value of capital to changes in interest rates as of June 30, 2018, are comparable to the estimates as of December 31, 2017, for rising rate scenarios and show less favorable sensitivity in declining rate scenarios. The change in sensitivity in the declining rate scenarios is related to faster projected mortgage prepayment speeds for fixed rate mortgage loans purchased under the MPF Program. LIBOR interest rates as of June 30, 2018, were 70 basis points higher for the 1-year term, 63 basis points higher for the 5-year term, and 53 basis points higher for the 10-year term. Because interest rates in the declining rate scenarios are

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limited to non-negative interest rates and the current interest rate environments as of June 30, 2018, and December 31, 2017, were low, the interest rates in the declining rate scenarios may not decrease to the same extent that the interest rates in the rising rate scenarios can increase.

The Bank's Risk Management Policy provides guidelines for the payment of dividends and the repurchase of excess capital stock based on the ratio of the Bank's estimated market value of total capital to par value of capital stock. If this ratio at the end of any quarter is: (i) less than 100% but greater than or equal to 90%, any dividend would be limited to an annualized rate no greater than the daily average of the three-month LIBOR for the applicable quarter (subject to certain conditions), and any excess capital stock repurchases would not exceed $500 million (subject to certain conditions); (ii) less than 90% but greater than or equal to 70%, any dividend and any excess capital stock repurchases would be subject to the same limitations and conditions as in (i) above, except that any excess capital stock repurchases would not exceed 4% of the Bank's outstanding capital stock as of the repurchase date; and (iii) less than 70%, the Bank would not pay a dividend, not repurchase excess capital stock (but continue to redeem excess capital stock as provided in the Bank's Capital Plan), limit the acquisition of certain assets, and review the Bank's risk policies. A decision by the Board of Directors to declare or not declare any dividend or repurchase any excess capital stock is a discretionary matter and is subject to the requirements and restrictions of the FHLBank Act and applicable requirements under the regulations governing the operations of the FHLBanks. The ratio of the Bank's estimated market value of total capital to par value of capital stock was 224% as of June 30, 2018.

Adjusted Return on Capital – The adjusted return on capital is a measure used by the Bank to assess financial performance. The adjusted return on capital is based on current period economic earnings that exclude the effects of unrealized net gains or losses resulting from the Bank’s derivatives and associated hedged items and from financial instruments carried at fair value, which will generally reverse through changes in future valuations and settlements of contractual interest cash flows over the remaining contractual terms to maturity or by the call or put date of the assets and liabilities held under the fair value option, hedged assets and liabilities, and derivatives. Economic earnings also exclude the interest expense on mandatorily redeemable capital stock and the 20% of net income allocated to the Bank’s restricted retained earnings account in accordance with the FHLBanks’ JCE Agreement. Economic earnings exclude these amounts in order to more accurately reflect the amount of earnings that may be available to be paid as dividends to shareholders.

The Bank limits the sensitivity of projected financial performance through a Board of Directors policy limit on projected adverse changes in the adjusted return on capital. The Bank’s adjusted return on capital sensitivity policy limits the potential adverse impact of an instantaneous parallel shift of a plus or minus 200-basis-point change in interest rates from current rates (base case) to no worse than –120 basis points from the base case projected adjusted return on capital. With the indicated interest rate shifts, the adjusted return on capital for the projected 12-month horizon would be expected to decrease by 85 basis points in the –200 basis points scenario, which is within the policy limit of –120 basis points.

Duration Gap – Duration gap is the difference between the estimated durations (market value sensitivity) of assets and liabilities (including the impact of interest rate exchange agreements) and reflects the extent to which estimated maturity and repricing cash flows for assets and liabilities are matched. The Bank monitors duration gap analysis at the total Bank level and does not have a policy limit.

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Total Bank Duration Gap Analysis
	June 30, 2018			December 31, 2017
	Amount (In millions)		Duration Gap(1) (In months)	Amount (In millions)		Duration Gap(1)(2) (In months)
Assets	$	106,208	4	$	123,385	4
Liabilities	99,709		4	116,579		3
Net	$	6,499	—	$	6,806	1

(1) Duration gap values include the impact of interest rate exchange agreements.

(2) Because of the low interest rate environment, the duration gap is estimated using an instantaneous, one-sided parallel change upward of 100 basis points from base case interest rates.

Segment Market Risk. The financial performance and interest rate risks of each business segment are managed within prescribed guidelines and policy limits.

Advances-Related Business – Interest rate risk arises from the advances-related business primarily through the use of shareholder-contributed capital and retained earnings to fund fixed rate investments of targeted amounts and maturities. In general, advances result in very little net interest rate risk for the Bank because most fixed rate advances with original maturities greater than three months and all advances with embedded options are simultaneously hedged with an interest rate swap or option with terms offsetting the advance. The interest rate swap or option generally is maintained as a hedge for the life of the advance. These hedged advances effectively create a pool of variable rate assets, which, in combination with the strategy of raising debt swapped to variable rate liabilities, creates an advances portfolio with low net interest rate risk.

Money market investments used for liquidity management generally have maturities of one month or less. In addition, the Bank invests in non-MBS agency securities, generally with terms of less than three years. These investments may be variable rate or fixed rate, and the interest rate risk resulting from the fixed rate coupon is hedged with an interest rate swap or fixed rate debt.

The interest rate risk in the advances-related business is primarily associated with the Bank’s strategy for investing capital (capital stock, including mandatorily redeemable capital stock, and retained earnings). The Bank’s strategy is generally to invest 50% of capital in short-term investments (maturities of three months or less) and 50% in intermediate-term investments (a laddered portfolio of investments with maturities of up to four years). However, this strategy may be altered from time to time depending on market conditions. The strategy to invest 50% of capital in short-term assets is intended to mitigate the market value of capital risks associated with the potential repurchase or redemption of excess capital stock. Excess capital stock usually results from a decline in a borrower’s outstanding advances or by a membership termination. Under the Bank’s capital plan, capital stock, when repurchased or redeemed, is required to be repurchased or redeemed at its par value of $100 per share, subject to certain regulatory and statutory limits. The strategy to invest 50% of capital in a laddered portfolio of investments with short to intermediate maturities is intended to take advantage of the higher earnings available from a generally positively sloped yield curve, when intermediate-term investments generally have higher yields than short-term investments.

The Bank updates the repricing and maturity gaps for actual asset, liability, and derivative transactions that occur in the advances-related segment each day. The Bank regularly compares the targeted repricing and maturity gaps to the actual repricing and maturity gaps to identify rebalancing needs for the targeted gaps. On a weekly basis, the Bank evaluates the projected impact of expected maturities and scheduled repricings of assets, liabilities, and interest rate exchange agreements on the interest rate risk of the advances-related segment. The analyses are prepared under base case and alternate interest rate scenarios to assess the effect of options embedded in the advances, related financing, and hedges. These analyses are also used to measure and manage potential reinvestment risk (when the remaining term of advances is shorter than the remaining term of the financing) and potential refinancing risk (when the remaining term of advances is longer than the remaining term of the financing).

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Because of the short-term and variable rate nature of the assets, liabilities, and derivatives of the advances-related business, the Bank’s interest rate risk guidelines address the amounts of net assets that are expected to mature or reprice in a given period. The market value sensitivity analyses and net interest income simulations are also used to identify and measure risk and variances to the target interest rate risk exposure in the advances-related segment.

Mortgage-Related Business – The Bank’s mortgage assets include MBS, most of which are classified as held-to-maturity (HTM) or available-for-sale (AFS), with a small amount classified as trading, and mortgage loans held for portfolio purchased under the MPF Program. The Bank is exposed to interest rate risk from the mortgage-related business because the principal cash flows of the mortgage assets and the liabilities that fund them are not exactly matched through time and across all possible interest rate scenarios, given the impact of mortgage prepayments and the existence of interest rate caps on certain adjustable rate MBS.

Historically, the Bank purchased a mix of intermediate-term fixed rate and adjustable rate MBS. The last purchase of a fixed rate MBS was in March 2014. Since March 2014, all MBS purchases were agency adjustable rate MBS. MPF loans that have been acquired are medium- or long-term fixed rate mortgage assets. This results in a mortgage portfolio that has a diversified set of interest rate risk attributes.

The estimated market risk of the mortgage-related business is managed both at the time an asset is purchased and on an ongoing basis for the total portfolio. At the time of purchase (for all significant mortgage asset acquisitions), the Bank analyzes the estimated earnings sensitivity and estimated market value sensitivity, taking into consideration the estimated mortgage prepayment sensitivity of the mortgage assets and anticipated funding and hedging activities under various interest rate scenarios. The related funding and hedging transactions are executed at or close to the time of purchase of a mortgage asset.

At least monthly, the Bank reviews the estimated market risk profile of the entire portfolio of mortgage assets and related funding and hedging transactions. The Bank then considers rebalancing strategies to modify the estimated mortgage portfolio market risk profile. Periodically, the Bank performs more in-depth analyses, which include an analysis of the impacts of non-parallel shifts in the yield curve and assessments of the impacts of unanticipated mortgage prepayment behavior. Based on these analyses, the Bank may take actions to rebalance the mortgage portfolio’s market risk profile. These rebalancing strategies may include entering into new funding and hedging transactions, forgoing or modifying certain funding or hedging transactions normally executed with new mortgage purchases, or terminating certain funding and hedging transactions for the mortgage asset portfolio.

The Bank manages the estimated interest rate risk associated with mortgage assets, including mortgage prepayment risk, through a combination of debt issuance and derivatives. The Bank may obtain funding through callable and non-callable FHLBank System debt and may execute derivative transactions to achieve principal cash flow patterns and market value sensitivities for the liabilities and derivatives that provide a significant offset to the interest rate and mortgage prepayment risks associated with the mortgage assets. Debt issued to finance mortgage assets may be fixed rate debt, callable fixed rate debt, or adjustable rate debt. Derivatives may be used as temporary hedges of anticipated debt issuance or long-term hedges of debt used to finance the mortgage assets. The derivatives used to hedge the interest rate risk of fixed rate mortgage assets generally may be callable and non-callable pay-fixed interest rate swaps. Derivatives may also be used to offset the interest rate cap risk embedded in adjustable rate MBS.

As discussed above in “Total Bank Market Risk – Market Value of Capital Sensitivity” the Bank uses market value of capital sensitivity as a primary market value metric for measuring the Bank’s exposure to interest rates. The Bank’s interest rate risk policies and guidelines for the mortgage-related business address the market value of capital sensitivity of the assets, liabilities, and derivatives of the mortgage-related business.

The following table presents results of the estimated market value of capital sensitivity analysis attributable to the mortgage-related business as of June 30, 2018, and December 31, 2017.

109

Market Value of Capital Sensitivity Estimated Percentage Change in Market Value of Bank Capital Attributable to the Mortgage-Related Business for Various Changes in Interest Rates
Interest Rate Scenario(1)	June 30, 2018		December 31, 2017
+200 basis-point change	–1.4	%	–1.7	%
+100 basis-point change	–0.4		–0.7
–100 basis-point change(2)	–0.1		+1.1
–200 basis-point change(2)	+0.7		+3.2

(1) Instantaneous change from actual rates at dates indicated.

(2) Interest rates for each maturity are limited to non-negative interest rates.

For the mortgage-related business, the Bank’s estimates of the sensitivity of the market value of capital to changes in interest rates as of June 30, 2018, are comparable to the estimates as of December 31, 2017, for rising rate scenarios and show less favorable sensitivity in declining rate scenarios. The change in sensitivity in declining rate scenarios is related to faster projected mortgage prepayment speeds for fixed rate mortgage loans purchased under the MPF Program. LIBOR interest rates as of June 30, 2018, were 70 basis points higher for the 1-year term, 63 basis points higher for the 5-year term, and 53 basis points higher for the 10-year term. Because interest rates in the declining rate scenarios are limited to non-negative interest rates and the current interest rate environments as of June 30, 2018, and December 31, 2017, were low, the interest rates in the declining rate scenarios may not decrease to the same extent that the interest rates in the rising rate scenarios can increase.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

The senior management of the Federal Home Loan Bank of San Francisco (Bank) is responsible for establishing and maintaining a system of disclosure controls and procedures designed to ensure that information required to be disclosed by the Bank in the reports filed or submitted under the Securities Exchange Act of 1934 (1934 Act) is recorded, processed, summarized, and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission. The Bank’s disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by the Bank in the reports that it files or submits under the 1934 Act is accumulated and communicated to the Bank’s management, including its principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating the Bank’s disclosure controls and procedures, the Bank’s management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and the Bank’s management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of controls and procedures.

Management of the Bank has evaluated the effectiveness of the design and operation of its disclosure controls and procedures with the participation of the president and chief executive officer and senior vice president and chief financial officer as of the end of the period covered by this report. Based on that evaluation, the Bank’s president and chief executive officer and senior vice president and chief financial officer have concluded that the Bank’s disclosure controls and procedures were effective at a reasonable assurance level as of the end of the period covered by this report.

Internal Control Over Financial Reporting

During the three months ended June 30, 2018, there were no changes in the Bank’s internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Bank’s internal control over financial reporting.

110

Consolidated Obligations

The Bank’s disclosure controls and procedures include controls and procedures for accumulating and communicating information in compliance with the Bank’s disclosure and financial reporting requirements relating to the joint and several liability for the consolidated obligations of the Federal Home Loan Banks (FHLBanks). Because the FHLBanks are independently managed and operated, the Bank’s management relies on information that is provided or disseminated by the Federal Housing Finance Agency (Finance Agency), the Office of Finance, and the other FHLBanks, as well as on published FHLBank credit ratings, in determining whether the joint and several liability regulation is reasonably likely to result in a direct obligation for the Bank or whether it is reasonably possible that the Bank will accrue a direct liability.

The Bank’s management also relies on the operation of the joint and several liability regulation. The joint and several liability regulation requires that each FHLBank file with the Finance Agency a quarterly certification that it will remain capable of making full and timely payment of all of its current obligations, including direct obligations, coming due during the next quarter. In addition, if an FHLBank cannot make such a certification or if it projects that it may be unable to meet its current obligations during the next quarter on a timely basis, it must file a notice with the Finance Agency. Under the joint and several liability regulation, the Finance Agency may order any FHLBank to make principal and interest payments on any consolidated obligations of any other FHLBank, or allocate the outstanding liability of an FHLBank among all remaining FHLBanks on a pro rata basis in proportion to each FHLBank’s participation in all consolidated obligations outstanding or on any other basis.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The Federal Home Loan Bank of San Francisco (Bank) may be subject to various legal proceedings arising in the normal course of business.

After consultation with legal counsel, the Bank is not aware of any legal proceedings that are expected to have a material effect on its financial condition or results of operations or that are otherwise material to the Bank.

ITEM 1A. RISK FACTORS

For a discussion of risk factors, see “Part I. Item 1A. Risk Factors” in the Bank’s 2017 Form 10-K. There have been no material changes from the risk factors disclosed in the “Part I. Item 1A. Risk Factors” section of the Bank’s 2017 Form 10-K.

111

ITEM 6.    EXHIBITS

Exhibit No.	Description
31.1	Certification of the President and Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of the President and Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

    

112

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on August 3, 2018.

Federal Home Loan Bank of San Francisco

/S/ J. GREGORY SEIBLY

J. Gregory Seibly President and Chief Executive Officer

/S/ KENNETH C. MILLER

Kenneth C. Miller Senior Vice President and Chief Financial Officer

(Principal Financial Officer)

113

EX-31.1

EXHIBIT 31.1

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

for the President and Chief Executive Officer

I, J. Gregory Seibly, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the period ended June 30, 2018, of the Federal Home Loan Bank of San Francisco;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 3, 2018	/S/ J. GREGORY SEIBLY
	J. Gregory Seibly President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

for the Chief Financial Officer

I, Kenneth C. Miller, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the period ended June 30, 2018, of the Federal Home Loan Bank of San Francisco;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 3, 2018	/S/ KENNETH C. MILLER
	Kenneth C. Miller Senior Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

Certification by the President and Chief Executive Officer

Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, J. Gregory Seibly, President and Chief Executive Officer of the Federal Home Loan Bank of San Francisco (“Registrant”), certify that, to the best of my knowledge:

1. The Registrant's Quarterly Report on Form 10-Q for the period ended June 30, 2018, (“Report”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: August 3, 2018	/S/ J. GREGORY SEIBLY
	J. Gregory Seibly President and Chief Executive Officer

A signed original of this written statement required by Section 906 has been provided to the Federal Home Loan Bank of San Francisco and will be retained by the Federal Home Loan Bank of San Francisco and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

Certification by the Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350,

as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

I, Kenneth C. Miller, Senior Vice President and Chief Financial Officer of the Federal Home Loan Bank of San Francisco (“Registrant”), certify that, to the best of my knowledge:

1. The Registrant's Quarterly Report on Form 10-Q for the period ended June 30, 2018, (“Report”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: August 3, 2018	/S/ KENNETH C. MILLER
	Kenneth C. Miller Senior Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Federal Home Loan Bank of San Francisco and will be retained by the Federal Home Loan Bank of San Francisco and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2018	Jul. 31, 2018
Document and Entity Information [Line Items]
Entity Registrant Name	FEDERAL HOME LOAN BANK OF SAN FRANCISCO
Entity Central Index Key	0001316944
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		31,014,964

XML

Statements of Condition - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks		$ 44	$ 31
Interest-bearing deposits		2,035	1,115
Securities purchased under agreements to resell		4,000	11,750
Federal funds sold		8,727	11,028
Trading securities	[1]	662	1,164
Available-for-sale (AFS) securities	[1]	3,510	3,833
Held-to-maturity (HTM) securities (fair values were $13,739 and $14,704, respectively)	[1],[2]	13,769	14,680
Advances (includes $6,083 and $6,431 at fair value under the fair value option, respectively)		70,314	77,382
Mortgage loans held for portfolio, net of allowance for credit losses of $0 and $0, respectively		2,728	2,076
Accrued interest receivable		161	119
Premises, software, and equipment, net		22	29
Derivative assets, net		141	83
Other assets		95	95
Total Assets		106,208	123,385
Liabilities:
Deposits		379	281
Consolidated obligations:
Bonds (includes $1,404 and $949 at fair value under the fair value option, respectively)		74,061	85,063
Discount notes		24,519	30,440
Total consolidated obligations		98,580	115,503
Mandatorily redeemable capital stock		255	309
Accrued interest payable		131	116
Affordable Housing Program (AHP) payable		198	204
Derivative liabilities, net		2	1
Other liabilities		164	165
Total Liabilities		99,709	116,579
Commitments and Contingencies (Note 17)
Capital:
Capital stock-Class B-Putable ($100 par value) issued and outstanding: 29 shares and 32 shares, respectively		2,850	3,243
Unrestricted retained earnings		2,707	2,670
Restricted retained earnings		612	575
Total Retained Earnings		3,319	3,245
Accumulated other comprehensive income/(loss) (AOCI)		330	318
Total Capital		6,499	6,806
Total Liabilities and Capital		$ 106,208	$ 123,385

[1] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

[2] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

XML

Statements of Condition (Parenthetical) - USD ($) shares in Millions, $ in Millions	Jun. 30, 2018		Dec. 31, 2017
Trading securities pledged as collateral that may be repledged	$ 0		$ 0
Available-for-sale securities pledged as collateral that may be repledged	0		0
Held-to-maturity securities pledged as collateral that may be repledged	0		0
Assets:
Fair Value of Held-to-maturity securities	13,739		14,704
Fair Value of Advances Under the Fair Value Option	6,083	[1]	6,431
Allowance for credit losses on mortgage loans	$ 0		$ 0
Capital:
Common stock, par value	$ 100
Common Class B [Member]
Capital:
Common stock, par value	$ 100		$ 100
Common stock, shares issued	29		32
Common stock, shares outstanding	29		32
Consolidated obligation bonds
Liabilities:
Fair Value of Bonds Under the Fair Value Option	$ 1,404		$ 949

[1] At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

XML

Statements of Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest Income:
Advances		$ 379	$ 193	$ 748	$ 346
Prepayment fees on advances, net		1	0	1	0
Interest-bearing deposits		6	2	10	3
Securities purchased under agreements to resell		23	3	32	4
Federal funds sold		42	26	93	45
Trading securities		4	4	8	8
AFS securities		56	60	113	121
HTM securities		87	67	168	134
Mortgage loans held for portfolio		23	11	44	20
Total Interest Income		621	366	1,217	681
Interest Expense:
Bonds		339	147	646	263
Discount notes		122	67	256	121
Deposits		1	1	2	1
Mandatorily redeemable capital stock	[1]	5	7	11	18
Total Interest Expense		467	222	915	403
Net Interest Income		154	144	302	278
Provision for/(reversal of) credit losses on mortgage loans		0	0	0	0
Net Interest Income After Mortgage Loan Loss Provision		154	144	302	278
Other Income/(Loss):
Total other-than-temporary impairment (OTTI) loss		(13)	(7)	(16)	(8)
Net amount of OTTI loss reclassified to/(from) AOCI		8	1	10	(1)
Net OTTI loss, credit-related		(5)	(6)	(6)	(9)
Net gain/(loss) on trading securities		0	(1)	(1)	0
Net gain/(loss) on advances and consolidated obligation bonds held under fair value option		(12)	5	(53)	4
Net gain/(loss) on derivatives and hedging activities		17	(19)	48	(28)
Gains on litigation settlements, net		0	0	0	119
Other		5	5	9	10
Total Other Income/(Loss)		5	(16)	(3)	96
Other Expense:
Compensation and benefits		19	19	40	38
Other operating expense		16	16	30	30
Federal Housing Finance Agency		2	1	3	3
Office of Finance		1	2	3	3
Quality Jobs Fund expense		5	0	15	40
Other, net		0	1	1	5
Total Other Expense		43	39	92	119
Income/(Loss) Before Assessment		116	89	207	255
AHP Assessment		12	9	22	27
Net Income/(Loss)		$ 104	$ 80	$ 185	$ 228

[1] The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments

XML

Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income/(Loss)	$ 104	$ 80	$ 185	$ 228
Other Comprehensive Income/(Loss):
Net change in pension and postretirement benefits	0	0	1	0
Net non-credit-related OTTI gain/(loss) on AFS securities:
Net change in fair value of other-than-temporarily impaired securities	3	84	20	113
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(8)	(1)	(10)	1
Total net non-credit-related OTTI gain/(loss) on AFS securities	(5)	83	10	114
Accretion of non-credit-related OTTI loss	0	1	1	2
Total net non-credit-related OTTI gain/(loss) on HTM securities	0	1	1	2
Total other comprehensive income/(loss)	(5)	84	12	116
Total Comprehensive Income/(Loss)	$ 99	$ 164	$ 197	$ 344

XML

Statements of Capital Accounts - USD ($) shares in Millions, $ in Millions	Total	Total Retained Earnings	Total Restricted Retained Earnings	Unrestricted [Member]	Accumulated Other Comprehensive Income/(Loss)	Common Class B - Putable [Member] Common Stock [Member]
Balance, Shares at Dec. 31, 2016						24
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of capital stock, shares						5
Repurchase of capital stock, shares						(2)
Net Shares Reclassified from/(to) Mandatorily Redeemable Capital Stock, Shares						0
Balance, Shares at Jun. 30, 2017						27
Balance at Dec. 31, 2016	$ 5,537	$ 3,056	$ 2,168	$ 888	$ 111	$ 2,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss)	344	228	149	79	116
Issuance of capital stock, value	551					551
Repurchase of capital stock, value	(232)					(232)
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net, value	(2)					(2)
Cash dividends on capital stock	(95)	(95)		(95)
Balance at Jun. 30, 2017	6,103	3,189	2,317	872	227	$ 2,687
Balance, Shares at Jun. 30, 2017						27
Balance at Mar. 31, 2017		3,150	2,300	850	143
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss)	164
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net, value	(2)
Cash dividends on capital stock		(41)		(41)
Balance at Jun. 30, 2017	6,103	3,189	2,317	872	227	$ 2,687
Balance, Shares at Dec. 31, 2017						32
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of capital stock, shares						7
Repurchase of capital stock, shares						(10)
Net Shares Reclassified from/(to) Mandatorily Redeemable Capital Stock, Shares						0
Balance, Shares at Jun. 30, 2018						29
Balance at Dec. 31, 2017	6,806	3,245	575	2,670	318	$ 3,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss)	197	185	37	148	12
Issuance of capital stock, value	681					681
Repurchase of capital stock, value	(1,072)					(1,072)
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net, value	(2)					(2)
Cash dividends on capital stock	(111)	(111)		(111)
Balance at Jun. 30, 2018	6,499	3,319	612	2,707	330	$ 2,850
Balance, Shares at Jun. 30, 2018						29
Balance at Mar. 31, 2018		3,273	592	2,681	335
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss)	99
Capital stock reclassified from/(to) mandatorily redeemable capital stock, net, value	(2)
Cash dividends on capital stock		(58)		(58)
Balance at Jun. 30, 2018	$ 6,499	$ 3,319	$ 612	$ 2,707	$ 330	$ 2,850

XML

Statements of Capital Accounts (Parenthetical)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Annualized Dividend Rate on Capital Stock	7.00%	8.04%

XML

Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Net Cash Provided by (Used in) Operating Activities
Net Income/(Loss)	$ 185	$ 228
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation and amortization	(24)	(23)
Provision for Loan Losses Expensed	0	0
Change in net fair value of trading securities	1	0
Change in net fair value adjustment on advances and consolidated obligation bonds held under the fair value option	53	(4)
Change in net derivatives and hedging activities	140	12
Net OTTI loss, credit-related	6	9
Net change in:
Accrued interest receivable	(44)	7
Other assets	(3)	17
Accrued interest payable	19	9
Other liabilities	(16)	(17)
Total adjustments	132	10
Net cash provided by/(used in) operating activities	317	238
Net Cash Provided by (Used in) Investing Activities
Interest-bearing deposits	(1,105)	(176)
Securities purchased under agreements to resell	7,750	(1,000)
Federal funds sold	2,301	(3,988)
Premises, software, and equipment	0	(11)
Trading securities:
Proceeds from maturities of long-term	501	801
AFS securities:
Proceeds from maturities of long-term	381	476
HTM securities:
Net (increase)/decrease in short-term	(50)	450
Proceeds from maturities of long-term	1,582	1,456
Purchases of long-term	(629)	(1,998)
Advances:
Repaid	999,983	815,993
Originated	(993,050)	(821,323)
Mortgage loans held for portfolio:
Principal collected	132	65
Purchases	(777)	(610)
Proceeds from sales of foreclosed assets	0	2
Net cash provided by/(used in) investing activities	17,019	(9,863)
Net Cash Provided by (Used in) Financing Activities
Net change in deposits and other financing activities	111	269
Borrowings from other FHLBanks	0	(1,345)
Net proceeds from issuance of consolidated obligations:
Bonds	41,662	34,821
Discount notes	72,788	78,530
Payments for matured and retired consolidated obligations:
Bonds	(52,606)	(24,072)
Discount notes	(78,720)	(78,719)
Proceeds from issuance of capital stock	681	551
Payments for repurchase/redemption of mandatorily redeemable capital stock	(56)	(55)
Payments for repurchase of capital stock	(1,072)	(232)
Cash dividends paid	(111)	(95)
Net cash provided by/(used in) financing activities	(17,323)	9,653
Net increase/(decrease) in cash and due from banks	13	28
Cash and due from banks at beginning of the period	31	2
Cash and due from banks at end of the period	44	30
Supplemental Disclosures:
Interest paid	888	391
AHP payments	29	23
Supplemental Disclosures of Noncash Investing and Financing Activities:
Transfers of other-than-temporarily impaired HTM securities to AFS securities	12	0
Transfers of capital stock to mandatorily redeemable capital stock	$ 2	$ 2

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Basis of Presentation (Notes)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The information about the Federal Home Loan Bank of San Francisco (Bank) included in these unaudited financial statements reflects all adjustments that, in the opinion of the Bank, are necessary for a fair statement of results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed. The results of operations in these interim statements are not necessarily indicative of the results to be expected for any subsequent period or for the entire year ending December 31, 2018. These unaudited financial statements should be read in conjunction with the Bank’s Annual Report on Form 10-K for the year ended December 31, 2017 (2017 Form 10‑K).

Use of Estimates. The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make a number of judgments, estimates, and assumptions that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income, expenses, gains, and losses during the reporting period. The most significant of these estimates include estimating the allowance for credit losses on the advances and mortgage loan portfolios; accounting for derivatives; estimating fair values of investments classified as trading and available-for-sale, derivatives and associated hedged items carried at fair value in accordance with the accounting for derivative instruments and associated hedging activities, and financial instruments carried at fair value under the fair value option, and accounting for other-than-temporary impairment (OTTI) for investment securities; and estimating the prepayment speeds on mortgage-backed securities (MBS) and mortgage loans for the accounting of amortization of premiums and accretion of discounts on MBS and mortgage loans. Actual results could differ significantly from these estimates.

Financial Instruments Meeting Netting Requirements. The Bank presents certain financial instruments, including derivative instruments and securities purchased under agreements to resell, on a net basis when they have a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). The Bank has elected to offset its derivative asset and liability positions, as well as cash collateral received or pledged, when the netting requirements are met. The Bank did not have any offsetting liabilities related to its securities purchased under agreements to resell for the periods presented.

The net exposure for these financial instruments can change on a daily basis; therefore, there may be a delay between the time this exposure change is identified and additional collateral is requested, and the time this collateral is received or pledged. Likewise, there may be a delay for excess collateral to be returned. For derivative instruments that meet the netting requirements, any excess cash collateral received or pledged is recognized as a derivative liability or derivative asset. Additional information regarding these agreements is provided in Note 15 – Derivatives and Hedging Activities. Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented.

Derivatives. All derivatives are recognized on the Statements of Condition at their fair values and are reported as either derivative assets or derivative liabilities, net of cash collateral, including initial and certain variation margin, and accrued interest received from or pledged to clearing agents and/or counterparties. The fair values of derivatives are netted by clearing agent and/or counterparty when the netting requirements have been met. If these netted amounts are positive, they are classified as an asset, and if negative, they are classified as a liability. Cash flows associated with derivatives are reflected as cash flows from operating activities on the Statements of Cash Flows unless the derivative meets the criteria to be a financing derivative.

The Bank uses the clearinghouse, London Clearing House (LCH) Ltd, for all cleared derivative transactions. Effective January 16, 2018, LCH Ltd made certain amendments to its rulebook, changing the legal characterization

of variation margin payments to be daily settlement payments, rather than collateral. Initial margin continues to be considered cash collateral.

Variable Interest Entities. The Bank’s investments in variable interest entities (VIEs) are limited to private-label residential mortgage-backed securities (PLRMBS). On an ongoing basis, the Bank performs a quarterly evaluation to determine whether it is the primary beneficiary in any VIE. The Bank evaluated its investments in VIEs as of June 30, 2018, to determine whether it is a primary beneficiary of any of these investments. The primary beneficiary is required to consolidate a VIE. The Bank determined that consolidation accounting is not required because the Bank is not the primary beneficiary of these VIEs for the periods presented. The Bank does not have the power to significantly affect the economic performance of any of these investments because it does not act as a key decision maker nor does it have the unilateral ability to replace a key decision maker. In addition, the Bank does not design, sponsor, transfer, service, or provide credit or liquidity support in any of its investments in VIEs. The Bank’s maximum loss exposure for these investments is limited to the carrying value.

Descriptions of the Bank’s significant accounting policies are included in “Item 8. Financial Statements and Supplementary Data – Note 1 – Summary of Significant Accounting Policies” in the Bank’s 2017 Form 10-K. Other changes to these policies as of June 30, 2018, are discussed in Note 2 – Recently Issued and Adopted Accounting Guidance.

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Recently Issued and Adopted Accounting Guidance

6 Months Ended

Jun. 30, 2018

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recently Issued and Adopted Accounting Guidance

Recently Issued and Adopted Accounting Guidance

Targeted Improvements to Accounting for Hedging Activities. On August 28, 2017, the Financial Accounting Standards Board (FASB) issued amended guidance to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. This guidance requires that, for fair value hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness be presented in the same income statement line that is used to present the earnings effect of the hedged item. For cash flow hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness must be recorded in other comprehensive income. In addition, the amendments include certain targeted improvements to the assessment of hedge effectiveness and permit, among other things, the following:

• Measurement of the change in fair value of the hedged item on the basis of the benchmark rate component of the contractual coupon cash flows determined at hedge inception.

• Measurement of the hedged item in a partial-term fair value hedge of interest rate risk by assuming the hedged item has a term that reflects only the designated cash flows being hedged.

• Consideration only of how changes in the benchmark interest rate affect a decision to settle a prepayable instrument before its scheduled maturity in calculating the change in the fair value of the hedged item attributable to interest rate risk.

• For a cash flow hedge of interest rate risk of a variable-rate financial instrument, an entity could designate as the hedged risk the variability in cash flows attributable to the contractually specified interest rate.

This guidance becomes effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. The amended presentation and disclosure guidance is required only prospectively. The Bank does not intend to adopt this guidance early. The Bank is in the process of evaluating this guidance, and its effect on the Bank’s financial condition, results of operations, cash flows, and financial statement disclosures has not yet been determined.

Premium Amortization on Purchased Callable Debt Securities. On March 30, 2017, the FASB issued amended guidance to shorten the amortization period for certain purchased callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). This guidance is

effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. This guidance should be applied using a modified retrospective method through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this guidance is not expected to have any effect on the Bank’s financial condition, results of operations, or cash flows.

Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. On March 10, 2017, the FASB issued amended guidance to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the Statements of Income. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018, and was adopted retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Statements of Income. The adoption of this guidance did not have a material effect on the Bank’s financial condition, results of operations, cash flows, or financial statement disclosures.

Classification of Certain Cash Receipts and Cash Payments. On August 26, 2016, the FASB issued amendments to clarify guidance on the classification of certain cash receipts and payments in the Statements of Cash Flows. This guidance is intended to reduce existing diversity in practice in how certain cash receipts and cash payments are presented and classified on the Statements of Cash Flows. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018. The adoption of this guidance did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Measurement of Credit Losses on Financial Instruments. On June 16, 2016, the FASB issued amended guidance for the accounting for credit losses on financial instruments. The amendments require entities to measure expected credit losses based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate under the circumstances. In addition, under the new guidance, a financial asset, or a group of financial assets, is required to be measured at its amortized cost to be presented at the net amount expected to be collected over the contractual term of the financial assets. Among other things, the guidance also requires:

• The Statement of Income to reflect the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period.

• The entities to determine the allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination that are measured at amortized cost basis in a similar manner to other financial assets measured at amortized cost basis. The initial allowance for credit losses is required to be added to the purchase price.

• Credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The amendments limit the allowance for credit losses to the amount by which fair value is below amortized cost.

• Public entities to further disaggregate the current disclosure of credit quality indicators in relation to the amortized cost of financing receivables by the year of origination (i.e., vintage).

The guidance is effective for the Bank for interim and annual periods beginning on January 1, 2020. Early application is permitted as of the interim and annual reporting periods beginning after December 15, 2018. The guidance should be applied using a modified-retrospective approach, through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. In addition, the entities are required to use a prospective transition approach for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination and for debt securities for which an other-than-temporary impairment had been recognized before the effective date. The Bank does not intend to adopt the guidance early. The Bank is in the process of evaluating this guidance and expects the adoption of the guidance may

result in an increase in the allowance for credit losses given the requirement to assess losses for the entire estimated life of the financial asset, including an allowance for debt securities. The effect on the Bank’s financial condition, results of operations, and cash flows will depend on the composition of financial assets held by the Bank at the adoption date, as well as on economic conditions and forecasts at that time.

Recognition of Lease Assets and Lease Liabilities. On February 25, 2016, the FASB issued guidance that requires recognition of lease assets and lease liabilities on the Statements of Condition and disclosure of key information about leasing arrangements. In particular, this guidance requires a lessee of operating or finance leases to recognize on the Statements of Condition a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. However, for leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. Under previous U.S. GAAP, a lessee was not required to recognize lease assets and lease liabilities arising from operating leases on the Statements of Condition. While this guidance does not fundamentally change lessor accounting, some changes have been made to align that guidance with the lessee guidance and other areas within U.S. GAAP.

The guidance becomes effective for the Bank for the interim and annual periods beginning on January 1, 2019, and early application is permitted. The guidance requires lessors and lessees to recognize and measure leases at the beginning of the earliest period presented in the financial statements using a modified retrospective approach. The Bank does not intend to adopt this guidance early. Upon adoption, the Bank expects to report higher assets and liabilities as a result of recording right-of-use assets and lease liabilities for its existing leases on the Statements of Condition. The Bank is in the process of evaluating this guidance, but its effect on the Bank’s financial condition, results of operations, and cash flows is not expected to be material.

Recognition and Measurement of Financial Assets and Financial Liabilities. On January 5, 2016, the FASB issued amended guidance on certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. This guidance includes, but is not limited to, the following:

• Requires equity investments (with certain exceptions) to be measured at fair value with changes in fair value recognized in net income;

• Requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments;

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the Statement of Condition or in the accompanying notes to the financial statements;

• Eliminates the requirement for public entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the Statement of Condition.

The guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. While the adoption of this guidance affected the Bank’s disclosures, the requirement to present the instrument-specific credit risk in other comprehensive income did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Revenue from Contracts with Customers. On May 28, 2014, the FASB issued guidance on revenue from contracts with customers. This guidance applies to all contracts with customers except those that are within the scope of certain other standards, such as financial instruments, certain guarantees, insurance contracts, and lease contracts. This guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. Given that the majority of the Bank's financial instruments and other contractual rights that generate revenue are covered by other U.S. GAAP, the adoption of this guidance did not have any effect on the Bank's financial condition, results of operations, or cash flows.

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Trading Securities

6 Months Ended

Jun. 30, 2018

Trading Securities [Abstract]

Trading Securities

Trading Securities

The estimated fair value of trading securities as of June 30, 2018, and December 31, 2017, was as follows:

	June 30, 2018		December 31, 2017
Government-Sponsored Enterprises (GSEs) – Federal Farm Credit Bank (FFCB) bonds	$	657	$	1,158
MBS – Other U.S. obligations – Ginnie Mae	5		6
Total	$	662	$	1,164

The net unrealized gain/(loss) on trading securities was de minimis and $(1) for the three months ended June 30, 2018 and 2017, respectively. The net unrealized gain/(loss) on trading securities was $(1) and de minimis for the six months ended June 30, 2018 and 2017, respectively. These amounts represent the changes in the fair value of the securities during the reported periods.

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Available-for-Sale Securities

6 Months Ended

Jun. 30, 2018

Available-for-sale Securities [Abstract]

Available-for-Sale Securities

Available-for-Sale Securities

Available-for-sale (AFS) securities by major security type as of June 30, 2018, and December 31, 2017, were as follows:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	294	$	—		$	29	$	—	$	323
Alt-A, option ARM	639		(7		)	137		—		769
Alt-A, other	2,230		(13		)	201		—		2,418
Total	$	3,163	$	(20	)	$	367	$	—	$	3,510

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	335	$	—		$	29	$	—	$	364
Alt-A, option ARM	714		(10		)	130		—		834
Alt-A, other	2,447		(23		)	211		—		2,635
Total	$	3,496	$	(33	)	$	370	$	—	$	3,833

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings.

Expected maturities of PLRMBS will differ from contractual maturities because borrowers generally have the right to prepay the underlying obligations without prepayment fees.

At June 30, 2018, the amortized cost of the Bank’s PLRMBS classified as AFS included credit-related OTTI of $742. At December 31, 2017, the amortized cost of the Bank’s PLRMBS classified as AFS included credit-related OTTI of $801.

The following table summarizes the AFS securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to

total gross unrealized losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of AFS securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	2	$	—	$	8	$	—	$	10	$	—
Alt-A, option ARM	—		—		137		7		137		7
Alt-A, other	49		—		277		13		326		13
Total	$	51	$	—	$	422	$	20	$	473	$	20

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	—	$	—	$	11	$	—	$	11	$	—
Alt-A, option ARM	—		—		144		10		144		10
Alt-A, other	5		—		356		23		361		23
Total	$	5	$	—	$	511	$	33	$	516	$	33

As indicated in the tables above, as of June 30, 2018, the Bank’s investments classified as AFS had unrealized losses related to PLRMBS, which were primarily due to illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost.

See Note 6 – Other-Than-Temporary Impairment Analysis for information on the transfers of securities between the AFS portfolio and the HTM portfolio.

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Held-to-Maturity Securities

6 Months Ended

Jun. 30, 2018

Held-to-maturity Securities, Unclassified [Abstract]

Held-to-maturity Securities

Held-to-Maturity Securities

The Bank classifies the following securities as HTM because the Bank has the positive intent and ability to hold these securities to maturity:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	550	$	—		$	550	$	—	$	—		$	550
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	$	155	$	—		$	155	$	—	$	(8	)	$	147
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	678		—			678		—		(12		)	666
GSEs – single-family:
Freddie Mac	1,760		—			1,760		7		(33		)	1,734
Fannie Mae	3,098		—			3,098		23		(20		)	3,101
Subtotal GSEs – single-family	4,858		—			4,858		30		(53		)	4,835
GSEs – multifamily:
Freddie Mac	4,855		—			4,855		6		—			4,861
Fannie Mae	1,993		—			1,993		—		(1		)	1,992
Subtotal GSEs – multifamily	6,848		—			6,848		6		(1		)	6,853
Subtotal GSEs	11,706		—			11,706		36		(54		)	11,688
PLRMBS:
Prime	443		—			443		4		(4		)	443
Alt-A, other	242		(5		)	237		10		(2		)	245
Subtotal PLRMBS	685		(5		)	680		14		(6		)	688
Total MBS	13,069		(5		)	13,064		50		(72		)	13,042
Total	$	13,774	$	(5	)	$	13,769	$	50	$	(80	)	$	13,739

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	500	$	—		$	500	$	—	$	—		$	500
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	187		—			187		—		(9		)	178
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	751		—			751		1		(1		)	751
GSEs – single-family:
Freddie Mac	2,039		—			2,039		12		(15		)	2,036
Fannie Mae	3,600		—			3,600		34		(8		)	3,626
Subtotal GSEs – single-family	5,639		—			5,639		46		(23		)	5,662
GSEs – multifamily:
Freddie Mac	4,651		—			4,651		6		(6		)	4,651
Fannie Mae	2,131		—			2,131		2		—			2,133
Subtotal GSEs – multifamily	6,782		—			6,782		8		(6		)	6,784
Subtotal GSEs	12,421		—			12,421		54		(29		)	12,446
PLRMBS:
Prime	521		—			521		5		(6		)	520
Alt-A, other	306		(6		)	300		11		(2		)	309
Subtotal PLRMBS	827		(6		)	821		16		(8		)	829
Total MBS	13,999		(6		)	13,993		71		(38		)	14,026
Total	$	14,686	$	(6	)	$	14,680	$	71	$	(47	)	$	14,704

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

At June 30, 2018, the amortized cost of the Bank’s MBS classified as HTM included premiums of $16, discounts of $21, and credit-related OTTI of $7. At December 31, 2017, the amortized cost of the Bank’s MBS classified as HTM included premiums of $19, discounts of $24, and credit-related OTTI of $7.

The following tables summarize the HTM securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to the total gross unrecognized holding losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of HTM securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	147	$	8	$	147	$	8
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	604		12		—		—		604		12
GSEs – single-family:
Freddie Mac	1,015		23		280		10		1,295		33
Fannie Mae	944		14		177		6		1,121		20
Subtotal GSEs – single-family	1,959		37		457		16		2,416		53
GSEs – multifamily:
Freddie Mac	444		—		—		—		444		—
Fannie Mae	950		1		133		—		1,083		1
Subtotal GSEs – multifamily	1,394		1		133		—		1,527		1
Subtotal GSEs	3,353		38		590		16		3,943		54
PLRMBS:
Prime	23		—		148		4		171		4
Alt-A, other	44		—		139		7		183		7
Subtotal PLRMBS	67		—		287		11		354		11
Total MBS	4,024		50		877		27		4,901		77
Total	$	4,024	$	50	$	1,024	$	35	$	5,048	$	85

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	178	$	9	$	178	$	9
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	406		1		—		—		406		1
GSEs – single-family:
Freddie Mac	895		9		323		6		1,218		15
Fannie Mae	702		4		205		4		907		8
Subtotal GSEs – single-family	1,597		13		528		10		2,125		23
GSEs – multifamily:
Freddie Mac	1,058		6		—		—		1,058		6
Fannie Mae	456		—		—		—		456		—
Subtotal GSEs – multifamily	1,514		6		—		—		1,514		6
Subtotal GSEs	3,111		19		528		10		3,639		29
PLRMBS:
Prime	2		—		202		6		204		6
Alt-A, other	15		—		191		8		206		8
Subtotal PLRMBS	17		—		393		14		410		14
Total MBS	3,534		20		921		24		4,455		44
Total	$	3,534	$	20	$	1,099	$	33	$	4,633	$	53

As indicated in the tables above, the Bank’s investments classified as HTM had unrealized losses on CalHFA bonds and MBS. The unrealized losses associated with the CalHFA bonds were mainly due to an illiquid market, credit concerns regarding the underlying mortgage collateral, and credit concerns regarding the monoline insurance providers, causing these investments to be valued at a discount to their acquisition cost. For its agency MBS, the Bank expects to recover the entire amortized cost basis of these securities because the Bank determined that the strength of the issuers’ guarantees through direct obligations or support from the U.S. government is sufficient to protect the Bank from losses. The unrealized losses associated with the PLRMBS were primarily due to illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost.

Redemption Terms. The amortized cost, carrying value, and estimated fair value of non-MBS securities by contractual maturity (based on contractual final principal payment) and of MBS as of June 30, 2018, and December 31, 2017, are shown below. Expected maturities of MBS will differ from contractual maturities because borrowers generally have the right to prepay the underlying obligations without prepayment fees.

June 30, 2018
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	550	$	550	$	550
Due after 10 years	155		155		147
Subtotal	705		705		697
MBS	13,069		13,064		13,042
Total	$	13,774	$	13,769	$	13,739

December 31, 2017
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	500	$	500	$	500
Due after 5 years through 10 years	12		12		12
Due after 10 years	175		175		166
Subtotal	687		687		678
MBS	13,999		13,993		14,026
Total	$	14,686	$	14,680	$	14,704

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

See Note 6 – Other-Than-Temporary Impairment Analysis for information on the transfers of securities between the AFS portfolio and the HTM portfolio.

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Other-Than-Temporary Impairment Analysis

6 Months Ended

Jun. 30, 2018

Other than Temporary Impairment Losses, Investments [Abstract]

Other-than-Temporary Impairment Analysis

Other-Than-Temporary Impairment Analysis

On a quarterly basis, the Bank evaluates its individual AFS and HTM investment securities in an unrealized loss position for OTTI. As part of this evaluation, the Bank considers whether it intends to sell each debt security and whether it is more likely than not that it will be required to sell the debt security before its anticipated recovery of the amortized cost basis. If either of these conditions is met, the Bank recognizes an OTTI charge to earnings equal to the entire difference between the security’s amortized cost basis and its fair value at the statement of condition date. For securities in an unrealized loss position that do not meet either of these conditions, the Bank considers whether it expects to recover the entire amortized cost basis of the security by comparing its best estimate of the present value of the cash flows expected to be collected from the security with the amortized cost basis of the

security. If the Bank’s best estimate of the present value of the cash flows expected to be collected is less than the amortized cost basis, the difference is considered the credit loss.

PLRMBS. A significant input to the Bank’s cash flow analysis of its PLRMBS is the forecast of future housing price changes. The OTTI Governance Committee of the Federal Home Loan Banks (FHLBanks) developed a short-term housing price forecast with projected changes ranging from a decrease of 8.0% to an increase of 13.0% over the 12-month period beginning April 1, 2018. For the vast majority of markets, the projected short-term housing price changes range from an increase of 2.0% to an increase of 7.0%. Thereafter, a unique path is projected for each geographic area based on an internally developed framework derived from historical data.

For all the PLRMBS in its AFS and HTM portfolios, the Bank does not intend to sell any security and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

For securities determined to be other-than-temporarily impaired as of June 30, 2018 (securities for which the Bank determined that it does not expect to recover the entire amortized cost basis), the following table presents a summary of the significant inputs used in measuring the amount of credit loss recognized in earnings during the second quarter of 2018, and the related current credit enhancement for the Bank.

June 30, 2018
	Significant Inputs for Other-Than-Temporarily Impaired PLRMBS			Current
	Prepayment Rates	Default Rates	Loss Severities	Credit Enhancement
Year of Securitization	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)
Alt-A, option ARM
2006	7.7	40.9	34.8	—
Total Alt-A, option ARM	7.7	40.9	34.8	—
Alt-A, other
2007	10.0	28.4	40.6	0.3
2006	10.6	25.4	39.4	20.6
2005	14.4	13.8	34.4	0.1
2004 and earlier	17.7	12.6	32.3	14.0
Total Alt-A, other	10.8	25.9	39.5	8.4
Total	10.4	27.8	38.9	7.4

(1) Weighted average percentage is based on unpaid principal balance.

Credit enhancement is defined as the percentage of subordinated tranches, excess spread, and over-collateralization, if any, in a security structure that will generally absorb losses before the Bank will experience a loss on the security. The calculated averages represent the dollar-weighted averages of all the PLRMBS investments in each category shown. The classification is based on the model used to run the estimated cash flows for the CUSIP, which may not necessarily be the same as the classification at the time of origination.

The following table presents the credit-related OTTI, which is recognized in earnings, for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Balance, beginning of the period	$	1,113		$	1,169		$	1,129		$	1,183
Additional charges on securities for which OTTI was previously recognized(1)	5			6			6			9
Accretion of yield adjustments resulting from improvement of expected cash flows that are recognized over the remaining life of the securities(2)	(15		)	(17		)	(32		)	(34		)
Balance, end of the period	$	1,103		$	1,158		$	1,103		$	1,158

(1) For the three months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to April 1, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to January 1, 2018 and 2017, respectively.

(2) The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $20 and $23 for the three months ended June 30, 2018 and 2017, respectively. The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively.

Changes in circumstances may cause the Bank to change its intent to hold a certain security to maturity without calling into question its intent to hold other debt securities to maturity in the future. The sale or transfer of an HTM security because of certain changes in circumstances, such as evidence of significant deterioration in the issuers’ creditworthiness, is not considered to be inconsistent with its original classification. In addition, other events that are isolated, nonrecurring, or unusual for the Bank that could not have been reasonably anticipated may cause the Bank to sell or transfer an HTM security without necessarily calling into question its intent to hold other debt securities to maturity.

In general, the Bank elects to transfer any PLRMBS that incurred a credit-related OTTI charge during the applicable period from the Bank’s held-to-maturity portfolio to its available-for-sale portfolio at their fair values. The Bank recognized an OTTI credit loss on these held-to-maturity PLRMBS, which the Bank believes is evidence of a significant decline in the issuers’ creditworthiness. The decline in the issuers’ creditworthiness is the basis for the transfers to the available-for-sale portfolio. These transfers allow the Bank the option to sell these securities prior to maturity in view of changes in interest rates, changes in prepayment risk, or other factors, while recognizing the Bank’s intent to hold these securities for an indefinite period of time. The Bank does not intend to sell its other-than-temporarily impaired securities and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

The following table summarizes the PLRMBS transferred from the Bank’s HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2018. The amounts shown represent the values when the securities were transferred from the HTM portfolio to the AFS portfolio. The Bank did not transfer any PLRMBS from its HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2017.

	Three Months Ended June 30, 2018								Six Months Ended June 30, 2018
	Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value		Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Alt-A, other	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12
Total	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12

The following tables present the Bank’s AFS and HTM PLRMBS that incurred OTTI losses anytime during the life of the securities at June 30, 2018, and December 31, 2017, by loan collateral type:

June 30, 2018
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	356	$	294	$	323	$	—	$	—	$	—	$	—
Alt-A, option ARM	859		639		769		—		—		—		—
Alt-A, other	2,679		2,230		2,418		58		53		49		58
Total	$	3,894	$	3,163	$	3,510	$	58	$	53	$	49	$	58

December 31, 2017
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	405	$	335	$	364	$	—	$	—	$	—	$	—
Alt-A, option ARM	953		714		834		—		—		—		—
Alt-A, other	2,927		2,447		2,635		64		59		53		63
Total	$	4,285	$	3,496	$	3,833	$	64	$	59	$	53	$	63

For the Bank’s PLRMBS that were not other-than-temporarily impaired as of June 30, 2018, the Bank has experienced net unrealized losses primarily because of illiquidity in the PLRMBS market and market expectations of the credit performance of loan collateral underlying these securities, which caused these assets to be valued at discounts to their amortized cost. The Bank does not intend to sell these securities, it is not more likely than not that the Bank will be required to sell these securities before its anticipated recovery of the remaining amortized cost basis, and the Bank expects to recover the entire amortized cost basis of these securities. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on these PLRMBS are temporary. These securities were included in the securities that the Bank reviewed and analyzed for OTTI as discussed above, and the analyses performed indicated that these securities were not other-than-temporarily impaired.

All Other Available-for-Sale and Held-to-Maturity Investments. For the Bank’s investments in housing finance agency bonds, which were issued by CalHFA, the gross unrealized losses were mainly due to an illiquid market, credit concerns regarding the underlying mortgage collateral, and credit concerns regarding the monoline insurance providers, causing these investments to be valued at a discount to their acquisition cost. The Bank independently modeled cash flows for the underlying collateral, using assumptions for default rates and loss severity that a market participant would deem reasonable, and concluded that the available credit support within the CalHFA structure more than offset the projected underlying collateral losses. The Bank determined that, as of June 30, 2018, all of the gross unrealized losses on the bonds are temporary because the underlying collateral and credit enhancements were sufficient to protect the Bank from losses. As a result, the Bank expects to recover the entire amortized cost basis of these securities.

For its agency MBS, the Bank expects to recover the entire amortized cost basis of these securities because the Bank determined that the strength of the issuers’ guarantees through direct obligations or support from the U.S.

government is sufficient to protect the Bank from losses. As a result, the Bank determined that, as of June 30, 2018, all of the gross unrealized losses on its agency MBS are temporary.

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Advances

6 Months Ended

Jun. 30, 2018

Federal Home Loan Banks [Abstract]

Advances

Advances

The Bank offers a wide range of fixed and adjustable rate advance products with different maturities, interest rates, payment characteristics, and option features. Fixed rate advances generally have maturities ranging from one day to 30 years. Adjustable rate advances generally have maturities ranging from less than 30 days to 10 years, with the interest rates resetting periodically at a fixed spread to LIBOR or to another specified index.

Redemption Terms. The Bank had advances outstanding, excluding overdrawn demand deposit accounts, at interest rates ranging from 0.86% to 8.57% at June 30, 2018, and 0.79% to 8.57% at December 31, 2017, as summarized below.

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	41,660		2.03	%	$	46,403		1.46	%
After 1 year through 2 years	14,131			2.19		16,287			1.61
After 2 years through 3 years	7,524			2.30		5,423			1.73
After 3 years through 4 years	4,596			2.42		6,719			1.69
After 4 years through 5 years	1,550			2.48		1,741			2.10
After 5 years	1,092			3.24		913			3.13
Total par value	70,553			2.14	%	77,486			1.57	%
Valuation adjustments for hedging activities	(161		)			(88		)
Valuation adjustments under fair value option	(78		)			(16		)
Total	$	70,314				$	77,382

Many of the Bank’s advances are prepayable at the borrower’s option. However, when advances are prepaid, the borrower is generally charged a prepayment fee intended to make the Bank financially indifferent to the prepayment. In addition, for certain advances with partial prepayment symmetry, the Bank may charge the borrower a prepayment fee or pay the borrower a prepayment credit depending on certain circumstances, such as movements in interest rates, when the advance is prepaid. The Bank had advances with partial prepayment symmetry outstanding totaling $5,109 at June 30, 2018, and $4,619 at December 31, 2017. Some advances may be repaid on pertinent call dates without prepayment fees (callable advances). The Bank had callable advances outstanding totaling $12,817 at June 30, 2018, and $18,373 at December 31, 2017.

The Bank’s advances at June 30, 2018, included $10 of putable advances. The Bank had no outstanding putable advances at December 31, 2017. At the Bank’s discretion, the Bank may terminate these advances on predetermined exercise dates and offer replacement funding at prevailing market rates, subject to certain conditions. The Bank would typically exercise such termination rights when interest rates increase relative to contractual rates.

The following table summarizes advances at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date for callable advances and by the earlier of the year of contractual maturity or next put date for putable advances.

 

	Earlier of Contractual Maturity or Next Call Date				Earlier of Contractual Maturity or Next Put Date
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Within 1 year	$	45,877	$	52,624	$	41,665	$	46,403
After 1 year through 2 years	13,256		12,593		14,136		16,287
After 2 years through 3 years	7,224		7,973		7,524		5,423
After 3 years through 4 years	1,596		1,719		4,596		6,719
After 4 years through 5 years	1,544		1,729		1,550		1,741
After 5 years	1,056		848		1,082		913
Total par value	$	70,553	$	77,486	$	70,553	$	77,486

Credit and Concentration Risk. The following tables present the concentration in advances to the top five borrowers and their affiliates at June 30, 2018 and 2017. The tables also present the interest income from these advances before the impact of interest rate exchange agreements associated with these advances for the three and six months ended June 30, 2018 and 2017.

	June 30, 2018				Three Months Ended June 30, 2018				Six Months Ended June 30, 2018
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
MUFG Union Bank, National Association	$	13,400	19	%	$	60	16	%	$	104	14	%
First Republic Bank	10,250		14		46		13		81		11
JPMorgan Chase Bank, National Association(2)	9,361		13		54		15		104		14
Bank of the West	7,508		11		35		10		64		9
Wells Fargo Financial National Bank	4,000		6		21		6		38		6
Subtotal	44,519		63		216		60		391		54
Others	26,034		37		145		40		336		46
Total par value	$	70,553	100	%	$	361	100	%	$	727	100	%

	June 30, 2017				Three Months Ended June 30, 2017				Six Months Ended June 30, 2017
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
JPMorgan Chase Bank, National Association(2)	$	12,805	23	%	$	45	22	%	$	86	24	%
Bank of the West	9,110		17		19		10		33		9
First Republic Bank	7,700		14		28		14		48		14
MUFG Union Bank, National Association	4,600		8		6		3		8		2
CIT Bank, N.A.	2,396		4		8		4		16		4
Subtotal	36,611		66		106		53		191		53
Others	18,576		34		95		47		171		47
Total par value	$	55,187	100	%	$	201	100	%	$	362	100	%

(1) Interest income amounts exclude the interest effect of interest rate exchange agreements with derivative counterparties; as a result, the total interest income amounts will not agree to the Statements of Income. The amount of interest income from advances can vary depending on the amount outstanding, terms to maturity, interest rates, and repricing characteristics.

(2) Nonmember institution.

The Bank held a security interest in collateral from each of the top five advances borrowers and their affiliates sufficient to support their respective advances outstanding, and the Bank does not expect to incur any credit losses on these advances.

For information related to the Bank’s credit risk on advances and allowance methodology for credit losses, see Note 9 – Allowance for Credit Losses.

Interest Rate Payment Terms. Interest rate payment terms for advances at June 30, 2018, and December 31, 2017, are detailed below:

	June 30, 2018		December 31, 2017
Par value of advances:
Fixed rate:
Due within 1 year	$	23,275	$	31,767
Due after 1 year	17,185		13,022
Total fixed rate	40,460		44,789
Adjustable rate:
Due within 1 year	18,385		14,636
Due after 1 year	11,708		18,061
Total adjustable rate	30,093		32,697
Total par value	$	70,553	$	77,486

The Bank did not have any advances with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative at June 30, 2018, or December 31, 2017. The Bank has generally elected to account for certain advances with embedded features under the fair value option, and these advances are carried at fair value on the Statements of Condition. For more information, see Note 16 – Fair Value.

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Mortgage Loans Held for Portfolio

6 Months Ended

Jun. 30, 2018

Mortgage Loans on Real Estate [Abstract]

Mortgage Loans Held for Portfolio

Mortgage Loans Held for Portfolio

Under the Mortgage Partnership Finance® (MPF®) Program, the Bank may purchase from members, for its own portfolio, conventional conforming fixed rate mortgage loans under the MPF Original product and mortgage loans insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA) under the MPF Government product. (“Mortgage Partnership Finance,” “MPF,” and “MPF Xtra” are registered trademarks of the FHLBank of Chicago.) In addition, the Bank may facilitate the purchase of conforming fixed rate mortgage loans from members for concurrent sale to Fannie Mae under the MPF Xtra® product; of jumbo fixed rate mortgage loans for concurrent sale to Redwood Residential Acquisition Corporation, a subsidiary of Redwood Trust, Inc., a real estate investment trust, under the MPF Direct product; and of government-insured or government-guaranteed mortgage loans that will be packaged into securities backed by the mortgage loans and guaranteed by Ginnie Mae under the MPF Government MBS product. When members sell mortgage loans under the MPF Xtra, MPF Direct, and MPF Government MBS products, the loans are sold to a third-party investor and are not recorded on the Bank’s Statements of Condition.

From May 2002 through October 2006, the Bank purchased conventional conforming fixed rate mortgage loans from its participating financial institutions under the MPF Original and MPF Plus products. Participating members originated or purchased the mortgage loans, credit-enhanced them and sold them to the Bank, and generally retained the servicing of the loans.

The following table presents information as of June 30, 2018, and December 31, 2017, on mortgage loans, all of which are secured by one- to four-unit residential properties and single-unit second homes.

	June 30, 2018			December 31, 2017
Fixed rate medium-term mortgage loans	$	20		$	32
Fixed rate long-term mortgage loans	2,618			1,973
Subtotal	2,638			2,005
Unamortized premiums	95			76
Unamortized discounts	(5		)	(5		)
Mortgage loans held for portfolio	2,728			2,076
Less: Allowance for credit losses	—			—
Total mortgage loans held for portfolio, net	$	2,728		$	2,076

Medium-term loans have original contractual terms of 15 years or less, and long-term loans have contractual terms of more than 15 years.

For information related to the Bank’s credit risk on mortgage loans and allowance methodology for credit losses, see Note 9 – Allowance for Credit Losses.

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Allowance for Credit Losses

6 Months Ended

Jun. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Allowance for Credit Losses

Allowance for Credit Losses

The Bank has established an allowance methodology for each of its portfolio segments: advances, letters of credit, and other extensions of credit, collectively referred to as “credit products,” mortgage loans held for portfolio, term securities purchased under agreements to resell, and term Federal funds sold. For more information on these portfolio segments, see “Item 8. Financial Statements and Supplementary Data – Note 10 – Allowance for Credit Losses” in the Bank’s 2017 Form 10-K.

Credit Products. The Bank manages its credit exposure related to credit products through an integrated approach that generally provides for a credit limit to be established for each borrower, includes an ongoing review of each borrower’s financial condition, and is coupled with conservative collateral and lending policies to limit the risk of loss while taking into account borrowers’ needs for a reliable funding source. At June 30, 2018, and December 31, 2017, none of the Bank’s credit products were past due, on nonaccrual status, or considered impaired. There were no troubled debt restructurings related to credit products during the six months ended June 30, 2018, or during 2017.

Based on the collateral pledged as security for advances, the Bank’s credit analyses of borrowers’ financial condition, and the Bank’s credit extension and collateral policies as of June 30, 2018, the Bank expects to collect all amounts due according to the contractual terms. Therefore, no allowance for losses on credit products was deemed necessary by the Bank. The Bank has never experienced any credit losses on its credit products.

Mortgage Loans Held for Portfolio. The following table presents information on delinquent mortgage loans as of June 30, 2018, and December 31, 2017.

	June 30, 2018			December 31, 2017
	Recorded Investment(1)			Recorded Investment(1)
30 – 59 days delinquent	$	7		$	8
60 – 89 days delinquent	2			2
90 days or more delinquent	11			12
Total past due	20			22
Total current loans	2,723			2,065
Total mortgage loans	$	2,743		$	2,087
In process of foreclosure, included above(2)	$	3		$	3
Nonaccrual loans	$	11		$	12
Loans past due 90 days or more and still accruing interest	$	—		$	—
Serious delinquencies as a percentage of total mortgage loans outstanding(3)	0.41		%	0.59		%

(1) The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

(2) Includes loans for which the servicer has reported a decision to foreclose or to pursue a similar alternative, such as deed-in-lieu. Loans in process of foreclosure are included in past due or current loans depending on their delinquency status.

(3) Represents loans that are 90 days or more past due or in the process of foreclosure as a percentage of the recorded investment of total mortgage loans outstanding.

The amounts of charge-offs and recoveries of allowance for credit losses on the mortgage loan portfolio were de minimis during the three and six months ended June 30, 2018 and 2017.

The recorded investment by impairment methodology for individually and collectively evaluated impaired loans is as follows:

(In millions)	June 30, 2018		December 31, 2017
Recorded investment, end of the period:
Individually evaluated for impairment	$	9	$	9
Collectively evaluated for impairment	2,734		2,078
Total recorded investment	$	2,743	$	2,087

The allowance for credit losses for loans collectively evaluated for impairment totaled de minimis amounts as of June 30, 2018, and December 31, 2017. The Bank had no allowance for credit losses for loans individually evaluated for impairment as of June 30, 2018, and a de minimis allowance for credit losses for loans individually evaluated for impairment as of December 31, 2017.

The recorded investment, unpaid principal balance, and related allowance of impaired loans individually evaluated for impairment are as follows:

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance	$	9	$	9	$	—	$	9	$	9	$	—
With an allowance	—		—		—		—		—		—
Total	$	9	$	9	$	—	$	9	$	9	$	—

The Bank and any participating financial institution share in the credit risk of the loans sold by that institution as specified in a master agreement. Loans purchased under the MPF Program generally had a credit risk exposure at the time of purchase that, as determined by the MPF Program methodology, would be expected from an equivalent investment rated AA if purchased prior to April 2017, or rated BBB if purchased since April 2017, taking i

nto consideration the credit risk sharing structure mandated by the Finance Agency’s acquired member assets (AMA) regulation. The MPF Program structures potential credit losses on conventional MPF loans into layers with respect to each pool of loans purchased by the Bank under a single master commitment, as follows:

1. The first layer of protection against loss is the liquidation value of the real property securing the loan.

2. The next layer of protection comes from the primary mortgage insurance that is required for loans with a loan-to-value ratio greater than 80%, if still in place.

3. Losses that exceed the liquidation value of the real property and any primary mortgage insurance, up to an agreed-upon amount called the first loss account for each master commitment, are incurred by the Bank.

4. Losses in excess of the first loss account for each master commitment, up to an agreed-upon amount called the credit enhancement amount, are covered by the participating financial institution’s credit enhancement obligation at the time losses are incurred.

5. Losses in excess of the first loss account and the participating financial institution’s remaining credit enhancement for the master commitment, if any, are incurred by the Bank.

Allowance for Credit Losses on MPF Loans – The Bank evaluates the allowance for credit losses on MPF mortgage loans based on two components. The first component applies to each individual loan that is specifically identified as impaired. The Bank evaluates the exposure on these loans by considering the first layer of loss protection (the liquidation value of the real property securing the loan) and the availability and collectability of credit enhancements under the terms of each master commitment and records a provision for credit losses. For this component, the Bank had no allowance for credit losses for MPF Original and MPF Plus loans as of June 30, 2018, and a de minimis allowance for credit losses for MPF Original and MPF Plus loans as of December 31, 2017.

The second component applies to loans that are not specifically identified as impaired and is based on the Bank’s estimate of probable credit losses on those loans as of the financial statement date. The Bank evaluates the credit loss exposure on a loan pool basis considering various observable data, such as delinquency statistics, past performance, current performance, loan portfolio characteristics, collateral valuations, industry data, and prevailing economic conditions. The Bank also considers the availability and collectability of credit enhancements from participating financial institutions or from mortgage insurers under the terms of each master commitment. For this component, the Bank established an allowance for credit losses for MPF Original and MPF Plus loans totaling de minimis amounts as of June 30, 2018, and December 31, 2017.

Troubled Debt Restructurings – Troubled debt restructuring (TDR) is considered to have occurred when a concession is granted to the debtor for economic or legal reasons related to the debtor’s financial difficulties and that concession would not have been considered otherwise. An MPF loan considered a TDR is individually evaluated for impairment when determining its related allowance for credit losses. Credit loss is measured by factoring in expected cash flow shortfalls incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates, if applicable. The recorded investment of the Bank's nonperforming MPF loans classified as TDRs totaled $2 as of June 30, 2018, and $3 as of December 31, 2017.

Term Federal Funds Sold. The Bank invests in Federal funds sold with counterparties that are considered by the Bank to be of investment quality, and these investments are evaluated for purposes of an allowance for credit losses only if the investment is not paid when due. All investments in Federal funds sold as of June 30, 2018, and December 31, 2017, were repaid or are expected to be repaid according to the contractual terms.

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Deposits

6 Months Ended

Jun. 30, 2018

Deposits [Abstract]

Deposits

Deposits

The Bank maintains demand deposit accounts that are directly related to the extension of credit to members and offers short-term deposit programs to members and qualifying nonmembers. In addition, a member that services mortgage loans may deposit in the Bank funds collected in connection with the mortgage loans, pe

nding disbursement of these funds to the owners of the mortgage loans. The Bank classifies these types of deposits as non-interest-bearing deposits.

Deposits as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018		December 31, 2017
Interest-bearing deposits:
Demand and overnight	$	354	$	263
Term	2		—
Total interest-bearing deposits	356		263
Non-interest-bearing deposits	23		18
Total	$	379	$	281

Interest Rate Payment Terms. Deposits classified as demand, overnight, and other pay interest based on a daily interest rate. Term deposits pay interest based on a fixed rate determined at the issuance of the deposit. Interest rate payment terms for deposits at June 30, 2018, and December 31, 2017, are detailed in the following table:

	June 30, 2018				December 31, 2017
	Amount Outstanding		Weighted Average Interest Rate		Amount Outstanding		Weighted Average Interest Rate
Interest-bearing deposits:
Adjustable rate	$	354	1.60	%	$	263	1.10	%
Fixed rate	2		1.60		—		—
Total interest-bearing deposits	356				263
Non-interest-bearing deposits	23				18
Total	$	379			$	281

The aggregate amount of time deposits with a denomination of $250 thousand or more was $2 at June 30, 2018. There were no time deposits at December 31, 2017. These time deposits are scheduled to mature within three months.

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Consolidated Obligations

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Consolidated Obligations

Consolidated Obligations

Consolidated obligations, consisting of consolidated obligation bonds and discount notes, are jointly issued by the FHLBanks through the Office of Finance, which serves as the FHLBanks’ agent. As provided by the FHLBank Act or by regulations governing the operations of the FHLBanks, all FHLBanks have joint and several liability for all FHLBank consolidated obligations. For a discussion of the joint and several liability regulation, see “Item 8. Financial Statements and Supplementary Data – Note 20 – Commitments and Contingencies” in the Bank’s 2017 Form 10-K. In connection with each issuance of consolidated obligations, each FHLBank specifies the type, term, and amount of debt it requests to have issued on its behalf. The Office of Finance tracks the amount of debt issued on behalf of each FHLBank. In addition, the Bank separately tracks and records as a liability its specific portion of the consolidated obligations issued and is the primary obligor for that portion of the consolidated obligations issued. The Finance Agency and the U.S. Secretary of the Treasury have oversight over the issuance of FHLBank debt through the Office of Finance.

Redemption Terms. The following is a summary of the Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017.

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	58,923		1.90	%	$	69,734		1.33	%
After 1 year through 2 years	6,226			1.88		6,461			1.42
After 2 years through 3 years	3,791			1.82		2,785			1.74
After 3 years through 4 years	1,165			1.93		2,058			1.78
After 4 years through 5 years	2,029			2.41		1,994			2.15
After 5 years	2,031			2.94		2,076			2.80
Total par value	74,165			1.94	%	85,108			1.41	%
Unamortized premiums	5					9
Unamortized discounts	(11		)			(11		)
Valuation adjustments for hedging activities	(84		)			(37		)
Fair value option valuation adjustments	(14		)			(6		)
Total	$	74,061				$	85,063

The Bank’s participation in consolidated obligation bonds outstanding includes callable bonds of $10,645 at June 30, 2018, and $9,612 at December 31, 2017. When a callable bond for which the Bank is the primary obligor is issued, the Bank may simultaneously enter into an interest rate swap (in which the Bank pays a variable rate and receives a fixed rate) with a call feature that mirrors the call option embedded in the bond (a sold callable swap). The Bank had notional amounts of interest rate exchange agreements hedging callable bonds of $7,141 at June 30, 2018, and $6,406 at December 31, 2017. The combined sold callable swaps and callable bonds enable the Bank to meet its funding needs at costs not otherwise directly attainable solely through the issuance of non-callable debt, while effectively converting the Bank’s net payment to an adjustable rate.

The Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017, was as follows:  

	June 30, 2018		December 31, 2017
Par value of consolidated obligation bonds:
Non-callable	$	63,520	$	75,496
Callable	10,645		9,612
Total par value	$	74,165	$	85,108

The following is a summary of the Bank’s participation in consolidated obligation bonds outstanding at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date.

Earlier of Contractual Maturity or Next Call Date	June 30, 2018		December 31, 2017
Within 1 year	$	68,154	$	78,606
After 1 year through 2 years	5,125		5,326
After 2 years through 3 years	730		935
After 3 years through 4 years	5		85
After 4 years through 5 years	90		55
After 5 years	61		101
Total par value	$	74,165	$	85,108

Consolidated obligation discount notes are consolidated obligations issued to raise short-term funds. These notes are issued at less than their face value and redeemed at par value when they mature. The Bank’s participation in consolidated obligation discount notes, all of which are due within one year, was as follows:

	June 30, 2018					December 31, 2017
	Amount Outstanding			Weighted Average Interest Rate (1)		Amount Outstanding			Weighted Average Interest Rate (1)
Par value	$	24,570		1.86	%	$	30,494		1.24	%
Unamortized discounts	(51		)			(54		)
Total	$	24,519				$	30,440

(1) Represents yield to maturity excluding concession fees.

Interest Rate Payment Terms. Interest rate payment terms for consolidated obligations at June 30, 2018, and December 31, 2017, are detailed in the following table. For information on the general terms and types of consolidated obligations outstanding, see “Item 8. Financial Statements and Supplementary Data – Note 12 – Consolidated Obligations” in the Bank’s 2017 Form 10-K.

	June 30, 2018		December 31, 2017
Par value of consolidated obligations:
Bonds:
Fixed rate	$	16,348	$	17,967
Adjustable rate	56,489		66,276
Step-up	953		565
Step-down	275		200
Range bonds	100		100
Total bonds, par value	74,165		85,108
Discount notes, par value	24,570		30,494
Total consolidated obligations, par value	$	98,735	$	115,602

The Bank did not have any bonds with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative at June 30, 2018, or December 31, 2017. The Bank has generally elected to account for certain bonds with embedded features under the fair value option, and these bonds are carried at fair value on the Statements of Condition. For more information, see Note 16 – Fair Value.

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Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income/(Loss)

Accumulated Other Comprehensive Income/(Loss)

The following table summarizes the changes in AOCI for the three months ended June 30, 2018 and 2017:

	Net Non-Credit-Related OTTI Loss on AFS Securities			Net Non-Credit-Related OTTI Loss on HTM Securities			Pension and Postretirement Benefits			Total AOCI
Balance, March 31, 2017	$	167		$	(8	)	$	(16	)	$	143
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(3		)	—						(3		)
Net change in fair value	84									84
Accretion of non-credit-related OTTI loss				1						1
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	2			—						2
Net current period other comprehensive income/(loss)	83			1			—			84
Balance, June 30, 2017	$	250		$	(7	)	$	(16	)	$	227
Balance, March 31, 2018	$	352		$	(5	)	$	(12	)	$	335
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(9		)	—						(9		)
Net change in fair value	3									3
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	1			—						1
Net current period other comprehensive income/(loss)	(5		)	—			—			(5		)
Balance, June 30, 2018	$	347		$	(5	)	$	(12	)	$	330

The following table summarizes the changes in AOCI for the six months ended June 30, 2018 and 2017:

	Net Non-Credit-Related OTTI Loss on AFS Securities			Net Non-Credit-Related OTTI Loss on HTM Securities			Pension and Postretirement Benefits			Total AOCI
Balance, December 31, 2016	$	136		$	(9	)	$	(16	)	$	111
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(3		)	—						(3		)
Net change in fair value	113									113
Accretion of non-credit-related OTTI loss				2						2
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	4			—						4
Net current period other comprehensive income/(loss)	114			2			—			116
Balance, June 30, 2017	$	250		$	(7	)	$	(16	)	$	227
Balance, December 31, 2017	$	337		$	(6	)	$	(13	)	$	318
Other comprehensive income/(loss) before reclassifications:
Net change in pension and postretirement benefits							1			1
Non-credit-related OTTI loss	(11		)	—						(11		)
Net change in fair value	20									20
Accretion of non-credit-related OTTI loss				1						1
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	1			—						1
Net current period other comprehensive income/(loss)	10			1			1			12
Balance, June 30, 2018	$	347		$	(5	)	$	(12	)	$	330

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Capital

6 Months Ended

Jun. 30, 2018

Capital [Abstract]

Capital

Capital

Capital Requirements. Under the Housing Act, the Director of the Finance Agency is responsible for setting the risk-based capital standards for the FHLBanks. The FHLBank Act and regulations governing the operations of the FHLBanks require that the Bank’s minimum capital stock requirement for shareholders must be sufficient to enable the Bank to meet its regulatory requirements for total capital, leverage capital, and risk-based capital. The Bank must maintain: (i) total regulatory capital in an amount equal to at least 4% of its total assets, (ii) leverage capital in an amount equal to at least 5% of its total assets, and (iii) permanent capital in an amount that is greater than or equal to its risk-based capital requirement. Because the Bank issues only Class B stock, regulatory capital and permanent capital for the Bank are both composed of retained earnings and Class B stock, including mandatorily redeemable capital stock (which is classified as a liability for financial reporting purposes). Regulatory capital and permanent capital do not include AOCI. Leverage capital is defined as the sum of permanent capital, weighted by a 1.5 multiplier, plus non-permanent capital.

The risk-based capital requirement is equal to the sum of the Bank’s credit risk, market risk, and operations risk capital requirements, all of which are calculated in accordance with the rules and regulations of the Finance Agency. The Finance Agency may require an FHLBank to maintain a greater amount of permanent capital than is required by the risk-based capital requirement as defined.

As of June 30, 2018, and December 31, 2017, the Bank was in compliance with these capital rules and requirements as shown in the following table.

	June 30, 2018						December 31, 2017
	Required			Actual			Required			Actual
Risk-based capital	$	2,022		$	6,424		$	2,023		$	6,797
Total regulatory capital	$	4,248		$	6,424		$	4,935		$	6,797
Total regulatory capital ratio	4.00		%	6.05		%	4.00		%	5.51		%
Leverage capital	$	5,310		$	9,636		$	6,169		$	10,195
Leverage ratio	5.00		%	9.07		%	5.00		%	8.26		%

Mandatorily Redeemable Capital Stock. The Bank had mandatorily redeemable capital stock totaling $255 outstanding to six institutions at June 30, 2018, and $309 outstanding to seven institutions at December 31, 2017. The change in mandatorily redeemable capital stock for the three and six months ended June 30, 2018 and 2017, was as follows:

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at the beginning of the period	$	309		$	403		$	309		$	457
Reclassified from/(to) capital during the period	2			2			2			2
Redemption of mandatorily redeemable capital stock	—			—			—			(54		)
Repurchase of excess mandatorily redeemable capital stock	(56		)	(1		)	(56		)	(1		)
Balance at the end of the period	$	255		$	404		$	255		$	404

Cash dividends on mandatorily redeemable capital stock were recorded as interest expense in the amount of $5 and $7 for the three months ended June 30, 2018 and 2017, respectively, and in the amount of $11 and $18 for the six months ended June 30, 2018 and 2017, respectively.

The Bank’s mandatorily redeemable capital stock is discussed more fully in “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

The following table presents mandatorily redeemable capital stock amounts by contractual redemption period at June 30, 2018, and December 31, 2017.

Contractual Redemption Period	June 30, 2018		December 31, 2017
After 1 year through 2 years	$	1	$	—
After 2 years through 3 years	251		306
Past contractual redemption date because of remaining activity(1)	3		3
Total	$	255	$	309

(1) Represents mandatorily redeemable capital stock that is past the end of the contractual redemption period because of outstanding activity.

Excess Stock Repurchase, Retained Earnings, and Dividend Framework. By Finance Agency regulation, dividends may be paid only out of current net earnings or previously retained earnings. As required by the Finance Agency, the Bank’s Excess Stock Repurchase, Retained Earnings, and Dividend Framework (Framework) summarizes the Bank’s capital management principles and objectives, as well as its policies and practices, with respect to retained earnings, dividend payments, and the repurchase of excess capital stock. The Bank may be restricted from paying dividends if the Bank is not in compliance with any of its minimum capital requirements or if payment would cause the Bank to fail to meet any of its minimum capital requirements. In addition, the Bank may not pay dividends if any principal or interest due on any consolidated obligations has not been paid in full or is not

expected to be paid in full, or, under certain circumstances, if the Bank fails to satisfy certain liquidity requirements under applicable Finance Agency regulations.

The Bank’s Board of Directors reviews the Framework at least annually and may amend the Framework from time to time. In January 2017, the Framework was amended and approved by the Bank’s Board of Directors to include a dividend philosophy to endeavor to pay a quarterly dividend at an annualized rate between 5% and 7%, which was considered by the Bank’s Board of Directors beginning with the Bank’s second quarter 2017 dividend declaration. The decision to declare any dividend and the dividend rate are at the discretion of the Bank’s Board of Directors, which may choose to follow the dividend philosophy as guidance in the dividend declaration.

The Bank’s Risk Management Policy limits the payment of dividends if the ratio of the Bank’s estimated market value of total capital to par value of capital stock falls below certain levels. If this ratio at the end of any quarter is less than 100% but greater than or equal to 70%, any dividend would be limited to an annualized rate no greater than the daily average of the three-month LIBOR for the applicable quarter (subject to certain conditions), and if this ratio is less than 70%, the Bank would be restricted from paying a dividend. The ratio of the Bank’s estimated market value of total capital to par value of capital stock was 224% as of June 30, 2018.

In addition, the Bank monitors the condition of its PLRMBS portfolio, the ratio of the Bank’s estimated market value of total capital to par value of capital stock, its overall financial performance and retained earnings, developments in the mortgage and credit markets, and other relevant information as the basis for determining the payment of dividends and the repurchase of excess capital stock each quarter.

Retained Earnings – The following tables summarize the activity related to retained earnings for the three and six months ended June 30, 2018 and 2017:

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, March 31, 2017	$	850		$	20	$	1,750	$	530	$	2,300	$	3,150
Net income	63			1		—		16		17		80
Cash dividends on capital stock	(41		)									(41		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, March 31, 2018	$	2,681		$	—	$	—	$	592	$	592	$	3,273
Net income	84			—		—		20		20		104
Cash dividends on capital stock	(58		)									(58		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, December 31, 2016	$	888		$	18	$	1,650	$	500	$	2,168	$	3,056
Net income	79			3		100		46		149		228
Cash dividends on capital stock	(95		)									(95		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, December 31, 2017	$	2,670		$	—	$	—	$	575	$	575	$	3,245
Net income	148			—		—		37		37		185
Cash dividends on capital stock	(111		)									(111		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

The Bank’s Framework assesses the level and adequacy of retained earnings and establishes amounts to be retained in restricted retained earnings, which are not made available in the current dividend period, and maintains an amount of total retained earnings at least equal to its required retained earnings as described in the Framework. Prior to July 2017, the Bank’s Framework had three categories of restricted retained earnings: Valuation Adjustments, Other (which represented a targeted amount), and the Joint Capital Enhancement (JCE Agreement). Under the Framework, the Bank’s required amount of restricted retained earnings was determined using the Bank’s retained earnings methodology. As determined using the Bank’s methodology, from July 2015 to January 2017, the Bank’s restricted retained earnings requirement was $2,000, and from January 2017 to July 2017, the Bank’s restricted retained earnings requirement was $2,300.

In July 2017, the Bank’s Board of Directors approved the transfer of all amounts classified as restricted retained earnings, other than the amounts related to the JCE Agreement, to unrestricted retained earnings. As a conforming change related to the transfer, the Bank’s Board of Directors amended the Framework to eliminate two of the categories of restricted retained earnings (Valuation Adjustments and Other) and approved revisions to the Bank’s retained earnings methodology to provide for a required level of total retained earnings of $2,300 for loss protection, capital compliance, and business growth. In January 2018, the methodology was further revised to provide a required level of total retained earnings of $2,500. The Bank satisfies its retained earnings requirement with both restricted retained earnings (i.e., amounts related to the JCE Agreement) and unrestricted retained earnings.

For more information on restricted retained earnings and the Bank’s Framework, see “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

Dividend Payments – Finance Agency rules state that FHLBanks may declare and pay dividends only from previously retained earnings or current net earnings, and may not declare or pay dividends based on projected or anticipated earnings. There is no requirement that the Board of Directors declare and pay any dividend. A decision by the Board of Directors to declare or not declare a dividend is a discretionary matter and is subject to the requirements and restrictions of the FHLBank Act and applicable requirements under the regulations governing the operations of the FHLBanks.

In addition, Finance Agency rules do not permit the Bank to pay dividends in the form of capital stock if its excess capital stock exceeds 1% of its total assets. Excess capital stock is defined as the aggregate of the capital stock held by each shareholder in excess of its minimum capital stock requirement, as established by the Bank’s capital plan. As of June 30, 2018, the Bank’s excess capital stock totaled $152, or 0.14% of total assets.

In the second quarter of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $63, including $58 in dividends on capital stock and $5 in dividends on mandatorily redeemable capital stock. In the second quarter of

2017, the Bank paid dividends at an annualized rate of 7.00%, totaling $48, including $41 in dividends on capital stock and $7 in dividends on mandatorily redeemable capital stock.

In the first six months of 2018, the Bank paid dividends at an annualized rate of 7.00%, totaling $122, including $111 in dividends on capital stock and $11 in dividends on mandatorily redeemable capital stock. In the first six months of 2017, the Bank paid dividends at an annualized rate of 8.04%, totaling $113, including $95 in dividends on capital stock and $18 in dividends on mandatorily redeemable capital stock.

For the periods referenced above, the Bank paid dividends in cash. Dividends on capital stock are recognized as dividends on the Statements of Capital Accounts, and dividends on mandatorily redeemable capital stock are recognized as interest expense on the Statements of Income.

On July 26, 2018, the Bank’s Board of Directors declared a cash dividend on the capital stock outstanding during the second quarter of 2018 at an annualized rate of 7.00%, totaling $56, including $51 in dividends on capital stock and $5 in dividends on mandatorily redeemable capital stock. The Bank recorded the dividend on July 26, 2018. The Bank expects to pay the dividend on August 13, 2018. Dividends on mandatorily redeemable capital stock will be recognized as interest expense in the third quarter of 2018.

Excess Capital Stock – The Bank may repurchase some or all of a shareholder’s excess capital stock, including any excess mandatorily redeemable capital stock, at the Bank’s discretion, subject to certain statutory and regulatory requirements. The Bank must give the shareholder 15 days’ written notice; however, the shareholder may waive this notice period. The Bank may also repurchase all of a member’s excess capital stock at a member’s request, at the Bank’s discretion, subject to certain statutory and regulatory requirements. A shareholder’s excess capital stock is defined as any capital stock holdings in excess of the shareholder’s minimum capital stock requirement, as established by the Bank’s capital plan. The Bank repurchased $700 and $60 in excess capital stock during the second quarter of 2018 and 2017, respectively, and $1,128 and $233 in excess capital stock during the first six months of 2018 and 2017, respectively.

The Bank is required to redeem any mandatorily redeemable capital stock that is in excess of a former member’s minimum stock requirement on or after the expiration of the five-year redemption date. During the second quarter of 2018 and 2017, the Bank redeemed de minimis amounts in mandatorily redeemable capital stock, for which the five-year redemption period had expired, at its $100 par value. The stock was redeemed on the scheduled redemption dates or, for stock that was not excess stock on its scheduled redemption date because of outstanding activity with the Bank, on the first available repurchase date after the stock was no longer required to support outstanding activity with the Bank.

On April 9, 2018, the Bank’s Board of Directors revised the Framework to change the Bank’s practice of repurchasing the surplus capital stock of all members and the excess capital stock of all former members from a quarterly schedule to a daily schedule. Surplus capital stock is defined as any stock holdings in excess of 115% of a member’s minimum stock requirement. Effective April 24, 2018, the Bank began calculating the amount of stock to be repurchased each business day based on the shareholder’s capital stock outstanding after all stock transactions are completed for the day, ensuring that each member and former member will continue to meet its minimum capital stock requirement after the repurchase. In accordance with the revised Framework, the Bank repurchased $363 of excess capital stock on April 24, 2018. The Bank may change this practice at any time. All repurchases of capital stock are at the Bank’s discretion, subject to certain statutory and regulatory requirements and to the Bank’s Risk Management Policy, Capital Plan, and the Framework.

Excess capital stock totaled $152 and $493 as of June 30, 2018, and December 31, 2017, respectively.

For more information on excess capital stock, see “Item 8. Financial Statements and Supplementary Data – Note 15 – Capital” in the Bank’s 2017 Form 10-K.

Concentration. The following table presents the concentration in capital stock held by institutions whose capital stock ownership represented 10% or more of the Bank’s outstanding capital stock, including mandatorily redeemable capital stock, as of June 30, 2018, or December 31, 2017.

	June 30, 2018				December 31, 2017
Name of Institution	Capital Stock Outstanding		Percentage of Total Capital Stock Outstanding		Capital Stock Outstanding		Percentage of Total Capital Stock Outstanding
MUFG Union Bank	$	367	12	%	$	205	6	%
Charles Schwab Bank	17		1		405		11
Subtotal	384		13		610		17
Others	2,721		87		2,942		83
Total	$	3,105	100	%	$	3,552	100	%

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Segment Information

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment Information

Segment Information

The Bank uses an analysis of financial results based on the financial components and adjusted net interest income of two operating segments, the advances-related business and the mortgage-related business, as well as other financial information, to review and assess financial performance and determine financial management strategies related to the operations of these two business segments. For purposes of segment reporting, adjusted net interest income includes income and expense associated with net settlements from economic hedges that are recorded in “Net gain/(loss) on derivatives and hedging activities” in other income and excludes interest expense that is recorded in “Mandatorily redeemable capital stock.” Other key financial information, such as any credit-related OTTI losses on the Bank’s PLRMBS, other expenses, and assessments, is not included in the segment reporting analysis, but is incorporated into the Bank’s overall assessment of financial performance.

For more information on these operating segments, see “Item 8. Financial Statements and Supplementary Data – Note 17 – Segment Information” in the Bank’s 2017 Form 10-K.

The following table presents the Bank’s adjusted net interest income by operating segment and reconciles total adjusted net interest income to income before the AHP assessment for the three and six months ended June 30, 2018 and 2017.

	Advances- Related Business		Mortgage- Related Business(1)		Adjusted Net Interest Income		Amortization of Basis Adjustments(2)			Income/(Expense) on Economic Hedges(3)			Interest Expense on Mandatorily Redeemable Capital Stock(4)		Net Interest Income After Mortgage Loan Loss Provision		Other Income/ (Loss)			Other Expense		Income Before AHP Assessment
Three months ended:
June 30, 2018	$	79	$	73	$	152	$	—		$	(7	)	$	5	$	154	$	5		$	43	$	116
June 30, 2017	57		81		138		—			(13		)	7		144		(16		)	39		89
Six months ended:
June 30, 2018	$	157	$	148	$	305	$	(1	)	$	(7	)	$	11	$	302	$	(3	)	$	92	$	207
June 30, 2017	105		164		269		(2		)	(25		)	18		278		96			119		255

(1) The mortgage-related business includes total accretion or amortization associated with other-than-temporarily impaired PLRMBS, which are recognized in interest income, totaled $20 and $23 for the three months ended June 30, 2018 and 2017; and totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively. The mortgage-related business does not include credit-related OTTI losses of $5 and $6 for the three months ended June 30, 2018 and 2017, and $6 and $9 for the six months ended June 30, 2018 and 2017, respectively.

(2) Represents amortization of amounts deferred for adjusted net interest income purposes only.

(3) The Bank includes income and expense associated with net settlements from economic hedges in adjusted net interest income in its analysis of financial performance for its two operating segments. For financial reporting purposes, the Bank does not include these amounts in net interest income in the Statements of Income, but instead records them in other income in “Net gain/(loss) on derivatives and hedging activities.”

(4) The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments.

The following table presents total assets by operating segment at June 30, 2018, and December 31, 2017.

	Advances- Related Business		Mortgage- Related Business		Total Assets
June 30, 2018	$	86,849	$	19,359	$	106,208
December 31, 2017	103,426		19,959		123,385

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Derivatives and Hedging Activities

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives and Hedging Activities

Derivatives and Hedging Activities

General. The Bank may enter into interest rate swaps (including callable, putable, and basis swaps); and cap and floor agreements (collectively, interest rate exchange agreements or derivatives). Most of the Bank’s interest rate exchange agreements are executed in conjunction with the origination of advances or the issuance of consolidated obligation bonds to create variable rate structures. The interest rate exchange agreements are generally executed at the same time the advances and bonds are transacted and generally have the same maturity dates as the related advances and bonds. The Bank transacts most of its derivatives with large banks and major broker-dealers. Some of these banks and broker-dealers or their affiliates buy, sell, and distribute consolidated obligations. Derivatives may be either uncleared or cleared. In an uncleared derivative transaction, the Bank’s counterparty is the executing bank or broker-dealer. In a cleared derivative transaction, the Bank may execute the transaction either directly with the executing bank or broker-dealer or on a swap execution facility, but in either case, the Bank’s counterparty is a derivatives clearing organization or clearinghouse once the derivative transaction has been accepted for clearing. The Bank is not a derivatives dealer and does not trade derivatives for short-term profit.

Additional uses of interest rate exchange agreements include: (i) offsetting embedded features in assets and liabilities, (ii) hedging anticipated issuance of debt, (iii) matching against consolidated obligation discount notes or bonds to create the equivalent of callable or non-callable fixed rate debt, (iv) modifying the repricing frequency of assets and liabilities, (v) matching against certain advances and consolidated obligations for which the Bank elected the fair value option, and (vi) exactly offsetting other derivatives cleared at a derivatives clearing organization. The Bank’s use of interest rate exchange agreements results in one of the following classifications: (i) a fair value hedge of an underlying financial instrument or (ii) an economic hedge of assets, liabilities, or other derivatives.

The Bank primarily uses the following derivative instruments:

Interest Rate Swaps – An interest rate swap is an agreement between two entities to exchange cash flows in the future. The agreement sets the dates on which the cash flows will be paid and the manner in which the cash flows will be calculated. One of the simplest forms of an interest rate swap involves the promise by one party to pay cash flows equivalent to the interest on a notional principal amount at a predetermined fixed rate for a given period of time. In return for this promise, the party receives cash flows equivalent to the interest on the same notional principal amount at a variable rate for the same period of time. The variable rate received or paid by the Bank in most interest rate exchange agreements is either indexed to LIBOR or to the overnight index swap rate.

Interest Rate Caps and Floors – In a cap agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate rises above a certain threshold (or cap) price. In a floor agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate falls below a certain threshold (or floor) price. Caps and floors may be used in conjunction with assets or liabilities. In general, caps and floors are designed as protection against the interest rate on a variable rate asset or liability rising above or falling below a certain level.

Hedging Activities. The Bank documents at inception all relationships between derivatives designated as hedging instruments and hedged items, its risk management objectives and strategies for undertaking various hedge transactions, and its method of assessing hedge effectiveness. Derivatives designated as fair value hedges may be transacted to hedge: (i) assets and liabilities on the Statement of Condition, (ii) firm commitments, or (iii) forecasted transactions. The Bank also formally assesses (both at hedge inception and on an ongoing basis) whether the hedging

derivatives have been effective in offsetting changes in the fair value of hedged items attributable to the hedged risk and whether those derivatives may be expected to remain effective hedges in future periods. The Bank typically uses regression analyses or other statistical analyses to assess the effectiveness of its hedges. When it is determined that a derivative has not been or is not expected to be effective as a hedge, the Bank discontinues hedge accounting prospectively.

The Bank discontinues hedge accounting prospectively when: (i) it determines that the derivative is no longer effective in offsetting changes in the fair value of a hedged item (including hedged items such as firm commitments or forecasted transactions); (ii) the derivative and/or the hedged item expires or is sold, terminated, or exercised; (iii) it is no longer probable that the forecasted transaction will occur in the originally expected period; (iv) a hedged firm commitment no longer meets the definition of a firm commitment; (v) it determines that designating the derivative as a hedging instrument is no longer appropriate; or (vi) it decides to use the derivative to offset changes in the fair value of other derivatives or instruments carried at fair value.

The Bank may have the following types of hedged items:

Investments – The Bank may invest in U.S. Treasury and agency obligations, agency MBS, and the taxable portion of highly rated state or local housing finance agency obligations. In the past, the Bank has also invested in PLRMBS rated AAA at the time of acquisition. The interest rate and prepayment risk associated with these investment securities is managed through a combination of debt issuance and derivatives. The Bank may manage prepayment risk and interest rate risk by funding investment securities with consolidated obligations that have call features or by hedging the prepayment risk with a combination of consolidated obligations and callable swaps. The Bank may execute callable swaps in conjunction with the issuance of certain liabilities to create funding that is economically equivalent to fixed rate callable debt. Although these derivatives are economic hedges against prepayment risk and are designated to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment. Investment securities may be classified as trading, AFS, or HTM.

The Bank may also manage the risk arising from changing market prices or cash flows of investment securities classified as trading by entering into interest rate exchange agreements (economic hedges) that offset the changes in fair value or cash flows of the securities. The market value changes of both the trading securities and the associated interest rate exchange agreements are included in other income in the Statements of Income.

Advances – The Bank offers a wide range of advances structures to meet members’ funding needs. These advances may have maturities up to 30 years with fixed or adjustable rates and may include early termination features or options. The Bank may use derivatives to adjust the repricing and options characteristics of advances to more closely match the characteristics of the Bank’s funding liabilities. In general, whenever a member executes a fixed rate advance, fixed rate advance with embedded options, or a variable rate advance with embedded options, the Bank will simultaneously execute an interest rate exchange agreement with terms that offset the terms and any embedded options in the advance. The combination of the advance and the interest rate exchange agreement effectively creates a variable rate asset. Fixed rate advances without options that are offset with an interest rate exchange agreement are generally treated as fair value hedges. Advances with embedded options are recorded using the fair value option and are economically hedged using interest rate exchange agreements.

Mortgage Loans – The Bank’s investment portfolio includes fixed rate mortgage loans. The prepayment options embedded in mortgage loans can result in extensions or contractions in the expected repayment of these investments, depending on changes in estimated prepayment speeds. The Bank manages the interest rate risk and prepayment risk associated with fixed rate mortgage loans through a combination of debt issuance and derivatives. The Bank uses both callable and non-callable debt to achieve cash flow patterns and market value sensitivities for liabilities similar to those expected on the mortgage loans. Net income could be reduced if the Bank replaces prepaid mortgage loans with lower-yielding assets and the Bank’s higher funding costs are not reduced accordingly.

The Bank executes callable swaps in conjunction with the issuance of certain consolidated obligations to create funding that is economically equivalent to fixed rate callable bonds. Although these derivatives are economic hedges against the prepayment risk of specific loan pools and are referenced to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment.

Consolidated Obligations – Consolidated obligation bonds may be structured to meet the Bank’s or the investors’ needs. Common structures include fixed rate bonds with or without call options and adjustable rate bonds with or without embedded options. In general, when bonds are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that offset the terms and embedded options, if any, of the consolidated obligation bond. This combination of the consolidated obligation bond and the interest rate exchange agreement effectively creates an adjustable rate bond. The cost of this funding combination is generally lower than the cost that would be available through the issuance of an adjustable rate bond alone. These transactions generally receive fair value hedge accounting treatment.

When the Bank issues consolidated obligation discount notes, it may also simultaneously enter into an interest rate exchange agreement to convert the fixed rate discount note to an adjustable rate discount note. This type of hedge is treated as an economic hedge.

In addition, when certain consolidated obligation bonds for which the Bank has elected the fair value option are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that economically offset the terms of the consolidated obligation bond. However, this type of hedge is treated as an economic hedge because these combinations do not meet the requirements for fair value hedge accounting treatment.

Offsetting Derivatives – The Bank enters into derivatives to offset the economic effect of other derivatives that are no longer designated to advances, investments, or consolidated obligations. Offsetting derivatives do not receive hedge accounting treatment and are separately marked to market through earnings. The net result of the accounting for these derivatives does not significantly affect the operating results of the Bank.

The notional amount of an interest rate exchange agreement serves as a factor in determining periodic interest payments or cash flows received and paid. However, the notional amount of derivatives represents neither the actual amounts exchanged nor the overall exposure of the Bank to credit risk and market risk. The risks of derivatives can be measured meaningfully on a portfolio basis by taking into account the counterparties, the types of derivatives, the items being hedged, and any offsets between the derivatives and the items being hedged.

The following table summarizes the notional amount and fair value of derivative instruments, including the effect of netting adjustments and cash collateral as of June 30, 2018, and December 31, 2017. For purposes of this disclosure, the derivative values include the fair value of derivatives and related accrued interest.

	June 30, 2018							December 31, 2017
	Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments:
Interest rate swaps	$	34,853	$	8	$	43		$	24,270	$	92		$	27
Total	34,853		8		43			24,270		92			27
Derivatives not designated as hedging instruments:
Interest rate swaps	39,022		83		74			73,760		81			57
Interest rate caps and floors	1,563		2		—			1,563		1			1
Mortgage delivery commitments	16		—		—			16		—			—
Total	40,601		85		74			75,339		82			58
Total derivatives before netting and collateral adjustments	$	75,454	93		117			$	99,609	174			85
Netting adjustments and cash collateral(1)			48		(115		)			(91		)	(84		)
Total derivative assets and total derivative liabilities			$	141	$	2				$	83		$	1

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

The following table presents the components of net gain/(loss) on derivatives and hedging activities as presented in the Statements of Income for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
	Gain/(Loss)			Gain/(Loss)			Gain/(Loss)			Gain/(Loss)
Derivatives designated as hedging instruments:
Interest rate swaps	$	2		$	(2	)	$	4		$	(2	)
Total net gain/(loss) related to fair value hedge ineffectiveness	2			(2		)	4			(2		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest rate swaps	18			(10		)	42			(8		)
Interest rate caps and floors	(1		)	(3		)	1			(5		)
Net settlements	(7		)	(13		)	(7		)	(25		)
Mortgage delivery commitments	5			9			9			12
Total net gain/(loss) related to derivatives not designated as hedging instruments	15			(17		)	45			(26		)
Other(1)	—			—			(1		)	—
Net gain/(loss) on derivatives and hedging activities	$	17		$	(19	)	$	48		$	(28	)

(1) Consists of price alignment amount on derivatives for which variation margin on cleared derivatives is characterized as a daily settled contract.

The following tables present, by type of hedged item, the gains and losses on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Bank’s net interest income for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	10		$	(6	)	$	4		$	17		$	(10	)	$	8		$	(2	)	$	(8	)
Consolidated obligation bonds	(6		)	4			(2		)	(8		)	1			(1		)	—			6
Total	$	4		$	(2	)	$	2		$	9		$	(9	)	$	7		$	(2	)	$	(2	)

	Six Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	80		$	(73	)	$	7		$	20		$	4		$	(6	)	$	(2	)	$	(17	)
Consolidated obligation bonds	(50		)	47			(3		)	(7		)	(10		)	10			—			15
Total	$	30		$	(26	)	$	4		$	13		$	(6	)	$	4		$	(2	)	$	(2	)

(1) The net interest on derivatives in fair value hedge relationships is presented in the interest income/expense line item of the respective hedged item.    

Credit Risk – The Bank is subject to credit risk as a result of potential nonperformance by counterparties to the interest rate exchange agreements. All of the Bank’s agreements governing uncleared derivative transactions contain master netting provisions to help mitigate the credit risk exposure to each counterparty. The Bank manages counterparty credit risk through credit analyses and collateral requirements and by following the requirements of the Bank’s risk management policies, credit guidelines, and Finance Agency and other regulations. The Bank also requires credit support agreements on all uncleared derivatives.

For cleared derivatives, the clearinghouse is the Bank’s counterparty. The requirement that the Bank post initial and variation margin through a clearing agent, to the clearinghouse, exposes the Bank to institutional credit risk in the event that the clearing agent or the clearinghouse fails to meet its obligations. The use of cleared derivatives, however, mitigates the Bank’s overall credit risk exposure because a central counterparty is substituted for individual counterparties. Variation margin and initial margin are posted for changes in the value and risk profile of cleared derivatives. The Bank has analyzed the enforceability of offsetting rights applicable to its cleared derivative transactions and determined that the exercise of those offsetting rights by a non-defaulting party under these transactions should be upheld under applicable bankruptcy law and Commodity Futures Trading Commission rules in the event of a clearinghouse or clearing agent insolvency and under applicable clearinghouse rules upon a non-insolvency-based event of default of the clearinghouse or clearing agent. Based on this analysis, the Bank presents a net derivative receivable or payable for all of its transactions through a particular clearing agent with a particular clearinghouse.

Based on the Bank’s credit analyses and the collateral requirements, the Bank does not expect to incur any credit losses on its derivative transactions.

The Bank’s agreements for uncleared derivative transactions contain provisions that link the Bank’s credit rating from Moody’s Investors Service and S&P Global Ratings to various rights and obligations. Certain of these derivative agreements provide that, if the Bank’s long-term debt rating falls below a specified rating (ranging from A3/A- to Baa3/BBB-), the Bank’s counterparty would have the right, but not the obligation, to terminate all of its outstanding derivative transactions with the Bank; the Bank’s agreements with its clearing agents for cleared derivative transactions have similar provisions with respect to the debt rating of FHLBank System consolidated

bonds. If this occurs, the Bank may choose to enter into replacement hedges, either by transferring the existing transactions to another counterparty or entering into new replacement transactions, based on prevailing market rates. The aggregate fair value of all uncleared derivative instruments with credit risk-related contingent features that were in a net derivative liability position (before cash collateral and related accrued interest) at June 30, 2018, was $58, for which the Bank had posted cash collateral of $56 in the ordinary course of business.

The Bank may present derivative instruments, related cash collateral received or pledged, and associated accrued interest by clearing agent or by counterparty when the netting requirements have been met.

The following table presents separately the fair value of derivative assets and derivative liabilities that have met the netting requirements, including the related collateral received from or pledged to counterparties as of June 30, 2018, and December 31, 2017.

	June 30, 2018							December 31, 2017
	Derivative Instruments Meeting Netting Requirements							Derivative Instruments Meeting Netting Requirements
	Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities		Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities
Derivative Assets
Uncleared	$	89	$	(87	)	$	2	$	35	$	(33	)	$	2
Cleared	4		135			139		139		(58		)	81
Total						$	141						$	83
Derivative Liabilities
Uncleared	$	113	$	(111	)	$	2	$	29	$	(28	)	$	1
Cleared	4		(4		)	—		56		(56		)	—
Total						$	2						$	1

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Fair Value

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value

Fair Value

The following fair value amounts have been determined by the Bank using available market information and the Bank’s best judgment of appropriate valuation methods. These estimates are based on pertinent information available to the Bank at June 30, 2018, and December 31, 2017. Although the Bank uses its best judgment in estimating the fair value of these financial instruments, there are inherent limitations in any estimation technique or valuation methodology. For example, because an active secondary market does not exist for a portion of the Bank’s financial instruments, in certain cases fair values cannot be precisely quantified or verified and may change as economic and market factors and evaluation of those factors change. The Bank continues to refine its valuation methodologies as markets and products develop and the pricing for certain products becomes more or less transparent. While the Bank believes that its valuation methodologies are appropriate and consistent with those of other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a materially different estimate of fair value as of the reporting date. U.S. GAAP defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). Therefore, the fair values are not necessarily indicative of the amounts that would be realized in current market transactions, although they do reflect the Bank’s judgment as to how a market participant would estimate the fair values. The fair value summary table does not represent an estimate of the overall market value of the Bank as a going concern, which would take into account future business opportunities and the net profitability of total assets and liabilities.

The following tables present the carrying value, the estimated fair value, and the fair value hierarchy level of the Bank’s financial instruments at June 30, 2018, and December 31, 2017. The Bank records trading securities, AFS

securities, derivative assets, derivative liabilities, certain advances, certain consolidated obligations, and certain other assets at fair value on a recurring basis, and on occasion certain mortgage loans held for portfolio and certain other assets at fair value on a nonrecurring basis. The Bank records all other financial assets and liabilities at amortized cost. Refer to the following tables for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis.

	June 30, 2018
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	44	$	44	$	44	$	—	$	—	$	—
Interest-bearing deposits	2,035		2,035		2,035		—		—		—
Securities purchased under agreements to resell	4,000		4,000		—		4,000		—		—
Federal funds sold	8,727		8,729		—		8,729		—		—
Trading securities	662		662		—		662		—		—
AFS securities	3,510		3,510		—		—		3,510		—
HTM securities	13,769		13,739		—		12,904		835		—
Advances	70,314		70,363		—		70,363		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,728		2,660		—		2,660		—		—
Accrued interest receivable	161		161		—		161		—		—
Derivative assets, net(1)	141		141		—		93		—		48
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	379		379		—		379		—		—
Consolidated obligations:
Bonds	74,061		73,839		—		73,839		—		—
Discount notes	24,519		24,518		—		24,518		—		—
Total consolidated obligations	98,580		98,357		—		98,357		—		—
Mandatorily redeemable capital stock	255		255		255		—		—		—
Accrued interest payable	131		131		—		131		—		—
Derivative liabilities, net(1)	2		2		—		117		—		(115		)
Other
Standby letters of credit	22		22		—		22		—		—

	December 31, 2017
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	31	$	31	$	31	$	—	$	—	$	—
Interest-bearing deposits	1,115		1,115		1,115		—		—		—
Securities purchased under agreements to resell	11,750		11,750		—		11,750		—		—
Federal funds sold	11,028		11,029		—		11,029		—		—
Trading securities	1,164		1,164		—		1,164		—		—
AFS securities	3,833		3,833		—		—		3,833		—
HTM securities	14,680		14,704		—		13,697		1,007		—
Advances	77,382		77,437		—		77,437		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,076		2,075		—		2,075		—		—
Accrued interest receivable	119		119		—		119		—		—
Derivative assets, net(1)	83		83		—		174		—		(91		)
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	281		281		—		281		—		—
Consolidated obligations:
Bonds	85,063		84,938		—		84,938		—		—
Discount notes	30,440		30,437		—		30,437		—		—
Total consolidated obligations	115,503		115,375		—		115,375		—		—
Mandatorily redeemable capital stock	309		309		309		—		—		—
Accrued interest payable	116		116		—		116		—		—
Derivative liabilities, net(1)	1		1		—		85		—		(84		)
Other
Standby letters of credit	19		19		—		19		—		—

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty.

(2) Represents publicly traded mutual funds held in a grantor trust.

Fair Value Hierarchy. The fair value hierarchy is used to prioritize the fair value methodologies and valuation techniques as well as the inputs to the valuation techniques used to measure fair value for assets and liabilities carried at fair value on the Statements of Condition. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). An entity must disclose the level within the fair value hierarchy in which the measurements are classified for all financial assets and liabilities measured on a recurring or non-recurring basis.

The application of the fair value hierarchy to the Bank’s financial assets and financial liabilities that are carried at fair value either on a recurring or non-recurring basis is as follows:

• Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date.

• Level 2 – Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar

assets or liabilities in markets that are not active; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and implied volatilities); and (4) inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 – Unobservable inputs for the asset or liability.

A financial instrument’s categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement.

The following assets and liabilities, including those for which the Bank has elected the fair value option, are carried at fair value on the Statements of Condition as of June 30, 2018:

• Trading securities

• AFS securities

• Certain advances

• Derivative assets and liabilities

• Certain consolidated obligation bonds

• Certain other assets

For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. Such reclassifications are reported as transfers in or out as of the beginning of the quarter in which the changes occur. For the periods presented, the Bank did not have any reclassifications for transfers in or out of the fair value hierarchy levels.

Summary of Valuation Methodologies and Primary Inputs.

The valuation methodologies and primary inputs used to develop the measurement of fair value for assets and liabilities that are measured at fair value on a recurring or nonrecurring basis in the Statements of Condition are listed below.

Investment Securities – MBS – To value its MBS, the Bank obtains prices from multiple designated third-party pricing vendors when available. The pricing vendors use various proprietary models to price these securities. The inputs to those models are derived from various sources including, but not limited to: benchmark yields, reported trades, dealer estimates, issuer spreads, prices on benchmark securities, bids, offers, and other market-related data. Since many securities do not trade on a daily basis, the pricing vendors use available information as applicable, such as benchmark yield curves, benchmarking of like securities, sector groupings, and matrix pricing, to determine the prices for individual securities. Each pricing vendor has an established challenge process in place for all security valuations, which facilitates resolution of price discrepancies identified by the Bank.

At least annually, the Bank conducts reviews of the multiple pricing vendors to update and confirm its understanding of the vendors’ pricing processes, methodologies, and control procedures.

The Bank’s valuation technique for estimating the fair values of its MBS first requires the establishment of a median vendor price for each security. If three prices are received, the middle price is the median price; if two prices are received, the average of the two prices is the median price; and if one price is received, it is the median price (and also the default fair value) subject to additional validation. All vendor prices that are within a specified tolerance threshold of the median price are included in the cluster of vendor prices that are averaged to establish a default fair value. All vendor prices that are outside the threshold (outliers) are subject to further analysis including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities and/or dealer estimates, or use of internal model prices, which are deemed to be reflective of all relevant facts and circumstances that a market participant would consider. Such analysis is also applied in those limited instances where no third-party vendor price or only one third-party vendor price is available in order to arrive at an

estimated fair value. If an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price, as appropriate) is used as the fair value rather than the default fair value. If, instead, the analysis confirms that an outlier is (or outliers are) not representative of fair value and the default fair value is the best estimate, then the default fair value is used as the fair value.

If all vendor prices received for a security are outside the tolerance threshold level of the median price, then there is no default fair value, and the fair value is determined by an evaluation of all outlier prices (or the other prices, as appropriate) as described above.

As of June 30, 2018, multiple vendor prices were received for most of the Bank’s MBS, and the fair value estimates for most of those securities were determined in accordance with the Bank’s valuation technique based on these vendor prices. Based on the Bank’s reviews of the pricing methods employed by the third-party pricing vendors and the relative lack of dispersion among the vendor prices (or, in those instances in which there were outliers, the Bank’s additional analyses), the Bank believes that its fair value estimates are reasonable and that the fair value measurements are classified appropriately in the fair value hierarchy. Based on limited market liquidity for PLRMBS, the fair value measurements for these securities were classified as Level 3 within the fair value hierarchy.

Investment Securities – FFCB Bonds – The Bank estimates the fair values of these securities using the methodology described above for Investment Securities – MBS.

Advances Recorded Under the Fair Value Option – Because quoted prices are not available for advances, the fair values are measured using model-based valuation techniques (such as calculating the present value of future cash flows and reducing the amount for accrued interest receivable).

The Bank’s primary inputs for measuring the fair value of advances recorded under the fair value option are market-based consolidated obligation yield curve (CO Curve) inputs obtained from the Office of Finance. The CO Curve is then adjusted to reflect the rates on replacement advances with similar terms and collateral. These spread adjustments are not market-observable and are evaluated for significance in the overall fair value measurement and the fair value hierarchy level of the advance. The Bank obtains market-observable inputs for complex advances recorded under the fair value option. These inputs may include volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew). The discount rates used in these calculations are the replacement advance rates for advances with similar terms. Pursuant to the Finance Agency’s advances regulation, advances with an original term to maturity or repricing period greater than six months generally require a prepayment fee sufficient to make the Bank financially indifferent to the borrower’s decision to prepay the advances. The Bank determined that no adjustment is required to the fair value measurement of advances for prepayment fees. In addition, the Bank did not adjust its fair value measurement of advances recorded under the fair value option for creditworthiness primarily because advances were fully collateralized.

Other Assets – The estimated fair value of grantor trust assets is based on quoted market prices.

Derivative Assets and Liabilities – In general, derivative instruments transacted and held by the Bank for risk management activities are traded in over-the-counter markets where quoted market prices are not readily available. These derivatives are interest rate-related. For these derivatives, the Bank measures fair value using internally developed discounted cash flow models that use market-observable inputs, such as the overnight index swap (OIS) curve and volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew), adjusted for counterparty credit risk, as necessary.

The Bank is subject to credit risk because of the risk of potential nonperformance by its derivative counterparties. To mitigate this risk, the Bank executes uncleared derivative transactions only with highly rated derivative de

alers and major banks (derivative dealer counterparties) that meet the Bank’s eligibility criteria. In addition, the Bank has entered into master netting agreements and bilateral credit support agreements with all active derivative dealer counterparties that provide for delivery of collateral at specified levels to limit the Bank’s net unsecured credit exposure to these counterparties. Under these policies and agreements, the amount of unsecured credit exposure to an individual derivative dealer counterparty is either (i) limited to an absolute dollar credit exposure limit according to the counterparty’s long-term debt or deposit credit rating, as determined by rating agencies or (ii) set at zero (subject to a minimum transfer amount). The Bank clears its cleared derivative transactions only through clearing agents that meet the Bank’s eligibility requirements, and the Bank’s credit exposure to the clearinghouse is secured by variation margin received from the clearinghouse. All credit exposure from derivative transactions entered into by the Bank with member counterparties that are not derivative dealers must be fully secured by eligible collateral. The Bank evaluated the potential for the fair value of the instruments to be affected by counterparty credit risk and determined that no adjustments to the overall fair value measurements were required.

The fair values of the derivative assets and liabilities include accrued interest receivable/payable and cash collateral remitted to/received from counterparties. The estimated fair values of the accrued interest receivable/payable and cash collateral approximate their carrying values because of their short-term nature. The fair values of derivatives that met the netting requirements are presented on a net basis. If these netted amounts are positive, they are classified as an asset and, if negative, they are classified as a liability.

Consolidated Obligations Recorded Under the Fair Value Option – Because quoted prices in active markets are not generally available for identical liabilities, the Bank measures fair values using internally developed models that use primarily market-observable inputs. The Bank’s primary input for measuring the fair value of consolidated obligation bonds is a market-based CO Curve obtained from the Office of Finance. The Office of Finance constructs the CO Curve using the Treasury yield curve as a base curve, which is adjusted by indicative consolidated obligation spreads obtained from market-observable sources. These market indications are generally derived from pricing indications from dealers, historical pricing relationships, and market activity for similar liabilities, such as recent GSE issuances or secondary market activity. For consolidated obligation bonds with embedded options, the Bank also obtains market-observable inputs, such as volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew).

Adjustments may be necessary to reflect the Bank’s credit quality or the credit quality of the FHLBank System when valuing consolidated obligation bonds measured at fair value. The Bank monitors its own creditworthiness and the creditworthiness of the other FHLBanks and the FHLBank System to determine whether any adjustments are necessary for creditworthiness in its fair value measurement of consolidated obligation bonds. The credit ratings of the FHLBank System and any changes to the credit ratings are the basis for the Bank to determine whether the fair values of consolidated obligations recorded under the fair value option have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

Subjectivity of Estimates Related to Fair Values of Financial Instruments. Estimates of the fair value of financial assets and liabilities using the methodologies described above are subjective and require judgments regarding significant matters, such as the amount and timing of future cash flows, prepayment speed assumptions, expected interest rate volatility, methods to determine possible distributions of future interest rates used to value options, and the selection of discount rates that appropriately reflect market and credit risks. Changes in these judgments often have a material effect on the fair value estimates.

Fair Value Measurements. The tables below present the fair value of assets and liabilities, which are recorded on a recurring or nonrecurring basis at June 30, 2018, and December 31, 2017, by level within the fair value hierarchy.

June 30, 2018
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	657	$	—	$	—		$	657
MBS:
Other U.S. obligations – Ginnie Mae	—		5		—		—			5
Total trading securities	—		662		—		—			662
AFS securities:
PLRMBS	—		—		3,510		—			3,510
Total AFS securities	—		—		3,510		—			3,510
Advances(2)	—		6,083		—		—			6,083
Derivative assets, net: interest rate-related	—		93		—		48			141
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	6,838	$	3,510	$	48		$	10,405
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	1,404	$	—	$	—		$	1,404
Derivative liabilities, net: interest rate-related	—		117		—		(115		)	2
Total recurring fair value measurements – Liabilities	$	—	$	1,521	$	—	$	(115	)	$	1,406
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	2	$	—		$	2
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	2	$	—		$	2

December 31, 2017
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	1,158	$	—	$	—		$	1,158
MBS:
Other U.S. obligations – Ginnie Mae	—		6		—		—			6
Total trading securities	—		1,164		—		—			1,164
AFS securities:
PLRMBS	—		—		3,833		—			3,833
Total AFS securities	—		—		3,833		—			3,833
Advances(2)	—		6,431		—		—			6,431
Derivative assets, net: interest rate-related	—		174		—		(91		)	83
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	7,769	$	3,833	$	(91	)	$	11,520
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	949	$	—	$	—		$	949
Derivative liabilities, net: interest rate-related	—		85		—		(84		)	1
Total recurring fair value measurements – Liabilities	$	—	$	1,034	$	—	$	(84	)	$	950
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	3	$	—		$	3
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	3	$	—		$	3

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed by the Bank, with the same clearing agents and/or counterparty.

(2) Represents advances recorded under the fair value option at June 30, 2018, and December 31, 2017.

(3) Represents consolidated obligation bonds recorded under the fair value option at June 30, 2018, and December 31, 2017.

(4) The fair value information presented is as of the date the fair value adjustment was recorded during the six months ended June 30, 2018, and the year ended December 31, 2017.

The following tables present a reconciliation of the Bank’s AFS PLRMBS that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,686		$	4,294
Total gain/(loss) realized and unrealized included in:
Interest income	20			24
Net OTTI loss, credit-related	(5		)	(6		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	3			84
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(8		)	(1		)
Settlements	(198		)	(231		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	15		$	16

	Six Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,833		$	4,489
Total gain/(loss) realized and unrealized included in:
Interest income	42			46
Net OTTI loss, credit-related	(6		)	(9		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	20			113
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(10		)	1
Settlements	(381		)	(476		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	36		$	36

Fair Value Option. The fair value option provides an entity with an irrevocable option to elect fair value as an alternative measurement for selected financial assets, financial liabilities, unrecognized firm commitments, and written loan commitments not previously carried at fair value. It requires an entity to display the fair value of those assets and liabilities for which the entity has chosen to use fair value on the face of the Statements of Condition. Fair value is used for both the initial and subsequent measurement of the designated assets, liabilities, and commitments, with the changes in fair value recognized in net income. Interest income and interest expense on advances and consolidated bonds carried at fair value are recognized solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized in non-interest income or non-interest expense.

For more information on the Bank’s election of the fair value option, see “Item 8. Financial Statements and Supplementary Data – Note 19 – Fair Values” in the Bank’s 2017 Form 10-K.

The Bank has elected the fair value option for certain financial instruments to assist in mitigating potential earnings volatility that can arise from economic hedging relationships in which the carrying value of the hedged item is not adjusted for changes in fair value. The potential earnings volatility associated with using fair value only for the derivative is the Bank’s primary reason for electing the fair value option for financial assets and liabilities that do not qualify for hedge accounting or that have not previously met or may be at risk for not meeting the hedge effectiveness requirements.

The following tables summarize the activity related to financial assets and liabilities for which the Bank elected the fair value option during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,637		$	1,315		$	3,816		$	2,236
New transactions elected for fair value option	342			89			1,772			95
Maturities and terminations	(882		)	—			(107		)	(1,215		)
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option	(14		)	(2		)	8			3
Change in accrued interest	—			2			1			(1		)
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

	Six Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,431		$	949		$	3,719		$	1,507
New transactions elected for fair value option	1,564			463			2,060			835
Maturities and terminations	(1,850		)	—			(299		)	(1,230		)
Net gain/(loss) from changes in fair value recognized in earnings	(63		)	(10		)	9			5
Change in accrued interest	1			2			1			1
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

For instruments for which the fair value option has been elected, the related contractual interest income and contractual interest expense are recorded as part of net interest income on the Statements of Income. The remaining changes in fair value for instruments for which the fair value option has been elected are recorded as net gains/ (losses) on financial instruments held under the fair value option in the Statements of Income, except for changes in fair value related to instrument-specific credit risk which are recorded in AOCI on the Statements of Condition. For advances and consolidated obligations recorded under the fair value option, the Bank determined that none of the remaining changes in fair value were related to instrument-specific credit risk for the three and six months ended June 30, 2018 and 2017. In determining that there has been no change in instrument-specific credit risk period to period, the Bank primarily considered the following factors:

• The Bank is a federally chartered GSE, and as a result of this status, the consolidated obligations have historically received the same credit ratings as the government bond credit rating of the United States, even though they are not obligations of the United States and are not guaranteed by the United States.

• The Bank is jointly and severally liable with the other FHLBanks for the payment of principal and interest on all consolidated obligations of each of the FHLBanks.

The following table presents the difference between the aggregate remaining contractual principal balance outstanding and aggregate fair value of advances and consolidated obligation bonds for which the Bank elected the fair value option at June 30, 2018, and December 31, 2017:

	June 30, 2018							December 31, 2017
	Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance			Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance
Advances(1)	$	6,161	$	6,083	$	(78	)	$	6,447	$	6,431	$	(16	)
Consolidated obligation bonds	1,418		1,404		(14		)	955		949		(6		)

(1)

At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

As provided by the FHLBank Act or regulations governing the operations of the FHLBanks, all FHLBanks have joint and several liability for all FHLBank consolidated obligations, which are backed only by the financial resources of the FHLBanks. The joint and several liability regulation authorizes the Finance Agency to require any FHLBank to repay all or a portion of the principal or interest on consolidated obligations for which another FHLBank is the primary obligor. The regulations provide a general framework for addressing the possibility that an FHLBank may be unable to repay the consolidated obligations for which it is the primary obligor. The Bank has never been asked or required to repay the principal or interest on any consolidated obligation on behalf of another FHLBank, and as of June 30, 2018, and through the filing date of this report, does not believe that it is probable that it will be asked to do so. The par value of the outstanding consolidated obligations of the FHLBanks was

$1,059,859 at June 30, 2018, and $1,034,260 at December 31, 2017. The par value of the Bank’s participation in consolidated obligations was $98,735 at June 30, 2018, and $115,602 at December 31, 2017. For more information on the joint and several liability regulation, see “Item 8. Financial Statements and Supplementary Data – Note 20 – Commitments and Contingencies” in the Bank’s 2017 Form 10-K.

Off-balance sheet commitments as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018						December 31, 2017
	Expire Within One Year		Expire After One Year		Total		Expire Within One Year		Expire After One Year		Total
Standby letters of credit outstanding	$	12,737	$	4,083	$	16,820	$	12,910	$	3,240	$	16,150
Commitments to fund additional advances	—		—		—		1		—		1
Commitments to issue consolidated obligation discount notes, par	57		—		57		134		—		134
Commitments to issue consolidated obligation bonds, par	—		—		—		595		—		595
Commitments to purchase mortgage loans	16		—		16		16		—		16

Standby letters of credit are generally issued for a fee on behalf of members to support their obligations to third parties. If the Bank is required to make a payment for a beneficiary’s drawing under a letter of credit, the amount is immediately due and payable by the member to the Bank and is charged to the member’s demand deposit account with the Bank. The original terms of these standby letters of credit range from 14 days to 15 years, including a final expiration in 2033. The Bank monitors the creditworthiness of members that have standby letters of credit. The value of the Bank’s obligations related to standby letters of credit is recorded in other liabilities and amounted to $22 at June 30, 2018, and $19 at December 31, 2017. Standby letters of credit are fully collateralized at the time of issuance. Based on the Bank’s credit analyses of members’ financial condition and collateral requirements, the Bank deemed it unnecessary to record any additional liability on the letters of credit outstanding as of June 30, 2018, and December 31, 2017.

Commitments to fund advances totaled $1 at December 31, 2017. There were no commitments to fund advances at June 30, 2018. Advances funded under advance commitments are fully collateralized at the time of funding (see Note 9 – Allowance for Credit Losses). Based on the Bank’s credit analyses of members’ financial condition and collateral requirements, the Bank deemed it unnecessary to record any additional liability on the advance commitments outstanding as of June 30, 2018, and December 31, 2017.

The Bank may enter into commitments that unconditionally obligate it to purchase mortgage loans from its members. Commitments are generally for periods not exceeding 60 days. Delivery commitments are recorded at fair value as derivative assets or derivative liabilities in the Statements of Condition.

The Bank executes over-the-counter uncleared interest rate exchange agreements with major banks and derivative entities affiliated with broker-dealers and has executed uncleared interest rate exchange agreements in the past with the Bank’s members. The Bank enters into master agreements with netting provisions and into bilateral credit support agreements with all active derivative dealer counterparties. All member counterparty master agreements, excluding those with derivative dealers, are subject to the terms of the Bank’s Advances and Security Agreement with members, and all member counterparties (except for those that are derivative dealers) must fully collateralize the Bank’s net credit exposure. For cleared derivatives, the clearinghouse is the Bank’s counterparty, and the Bank has clearing agreements with clearing agents that provide for delivery of initial margin to, and exchange of variation margin with, the clearinghouse. See Note 15 – Derivatives and Hedging Activities for additional information about the Bank’s pledged collateral and other credit-risk-related contingent features.

The Bank may be subject to various pending legal proceedings that may arise in the ordinary course of business. After consultation with legal counsel, the Bank does not anticipate that the ultimate liability, if any, arising out of these matters will have a material effect on its financial condition or results of operations.

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Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks

6 Months Ended

Jun. 30, 2018

Related Party Transactions [Abstract]

Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks

Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks

Transactions with Members and Nonmembers. The following tables set forth information at the dates and for the periods indicated with respect to transactions with members that have an officer or director serving on the Bank’s Board of Directors.

	June 30, 2018		December 31, 2017
Assets:
Advances	$	3,811	$	3,072
Mortgage loans held for portfolio	12		13
Accrued interest receivable	7		5
Liabilities:
Deposits	$	26	$	3
Capital:
Capital Stock	$	142	$	126

	Three Months Ended				Six Months Ended
	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Interest Income:
Advances	$	17	$	10	$	31	$	19

All transactions with members, nonmembers, and their affiliates are entered into in the ordinary course of business. As of June 30, 2018, and December 31, 2017, no shareholder owned more than 10% of the total voting interests in the Bank because of the statutory limit on members' voting rights. For more information on transactions with members and nonmembers, see “Item 8. Financial Statements and Supplementary Data – Note 21 – Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks” in the Bank’s 2017 Form 10-K.

Transactions with Other FHLBanks. The Bank may occasionally enter into transactions with other FHLBanks. These transactions are summarized below.

Deposits with other FHLBanks. The Bank may, from time to time, maintain deposits with other FHLBanks. Deposits with other FHLBanks totaled de minimis amounts at June 30, 2018, and December 31, 2017, which were recorded in the Statements of Condition in the Cash and due from banks line item.

Overnight Funds. The Bank may borrow or lend unsecured overnight funds from or to other FHLBanks. All such transactions are at current market rates. Interest income and interest expense related to these transactions with other FHLBanks are included in other interest income and interest expense from other borrowings in the Statements of Income. Balances outstanding at period end with other FHLBanks, if any, are identified in the Bank’s financial statements. During the six months ended June 30, 2018 and 2017, the Bank extended overnight loans to other FHLBanks for $280 and $1,005, respectively. During the six months ended June 30, 2018 and 2017, the Bank borrowed $1,510 and $15, respectively, from other FHLBanks. The impact to net interest income related to these transactions was de minimis in any period in this report.

MPF Mortgage Loans. The Bank pays a transaction services fee to the FHLBank of Chicago for its participation in the MPF program. This fee is assessed monthly and is based on the amount of mortgage loans in which the Bank invested and which remain outstanding on its Statements of Condition. For the three and six months ended June 30, 2018, the Bank recorded a de minimis amount and $1, respectively, in MPF transaction services fee expense to the FHLBank of Chicago, which was recorded in the Statements of Income as other expense. For the three and six

months ended June 30, 2017, the Bank recorded a de minimis amount and $1, respectively, in MPF transaction services fee expense to the FHLBank of Chicago.

In addition, the Bank receives a counterparty fee from the FHLBank of Chicago for facilitating the sale of loans under the MPF program. For the three and six months ended June 30, 2018 and 2017, the Bank recorded a de minimis amount in MPF counterparty fee income from the FHLBank of Chicago, which was recorded in the Statements of Income as other income.

Consolidated Obligations. The Bank may, from time to time, transfer to or assume from another FHLBank the outstanding primary liability for FHLBank consolidated obligations. During the six months ended June 30, 2018 and 2017, the Bank did not transfer any debt to other FHLBanks or assume any debt from other FHLBanks.

Transactions with the Office of Finance. The Bank’s proportionate share of the cost of operating the Office of Finance is identified in the Statements of Income.

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Subsequent Events

6 Months Ended

Jun. 30, 2018

Subsequent Events [Abstract]

Subsequent Events

Subsequent Events There were no material subsequent events identified, subsequent to June 30, 2018, until the time of the Form 10-Q filing with the Securities and Exchange Commission.

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Use of Estimates, Policy

The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make a number of judgments, estimates, and assumptions that may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities, and the reported amounts of income, expenses, gains, and losses during the reporting period. The most significant of these estimates include estimating the allowance for credit losses on the advances and mortgage loan portfolios; accounting for derivatives; estimating fair values of investments classified as trading and available-for-sale, derivatives and associated hedged items carried at fair value in accordance with the accounting for derivative instruments and associated hedging activities, and financial instruments carried at fair value under the fair value option, and accounting for other-than-temporary impairment (OTTI) for investment securities; and estimating the prepayment speeds on mortgage-backed securities (MBS) and mortgage loans for the accounting of amortization of premiums and accretion of discounts on MBS and mortgage loans. Actual results could differ significantly from these estimates.

Derivatives, Offsetting Fair Value Amounts, Policy

The Bank presents certain financial instruments, including derivative instruments and securities purchased under agreements to resell, on a net basis when they have a legal right of offset and all other requirements for netting are met (collectively referred to as the netting requirements). The Bank has elected to offset its derivative asset and liability positions, as well as cash collateral received or pledged, when the netting requirements are met. The Bank did not have any offsetting liabilities related to its securities purchased under agreements to resell for the periods presented.The net exposure for these financial instruments can change on a daily basis; therefore, there may be a delay between the time this exposure change is identified and additional collateral is requested, and the time this collateral is received or pledged. Likewise, there may be a delay for excess collateral to be returned. For derivative instruments that meet the netting requirements, any excess cash collateral received or pledged is recognized as a derivative liability or derivative asset. Additional information regarding these agreements is provided in Note 15 – Derivatives and Hedging Activities. Based on the fair value of the related collateral held, the securities purchased under agreements to resell were fully collateralized for the periods presented.

Derivatives, Policy [Policy Text Block]

Derivatives. All derivatives are recognized on the Statements of Condition at their fair values and are reported as either derivative assets or derivative liabilities, net of cash collateral, including initial and certain variation margin, and accrued interest received from or pledged to clearing agents and/or counterparties. The fair values of derivatives are netted by clearing agent and/or counterparty when the netting requirements have been met. If these netted amounts are positive, they are classified as an asset, and if negative, they are classified as a liability. Cash flows associated with derivatives are reflected as cash flows from operating activities on the Statements of Cash Flows unless the derivative meets the criteria to be a financing derivative.

The Bank uses the clearinghouse, London Clearing House (LCH) Ltd, for all cleared derivative transactions. Effective January 16, 2018, LCH Ltd made certain amendments to its rulebook, changing the legal characterization

of variation margin payments to be daily settlement payments, rather than collateral. Initial margin continues to be considered cash collateral.

Consolidation, Variable Interest Entity, Policy

The Bank’s investments in variable interest entities (VIEs) are limited to private-label residential mortgage-backed securities (PLRMBS). On an ongoing basis, the Bank performs a quarterly evaluation to determine whether it is the primary beneficiary in any VIE. The Bank evaluated its investments in VIEs as of June 30, 2018, to determine whether it is a primary beneficiary of any of these investments. The primary beneficiary is required to consolidate a VIE. The Bank determined that consolidation accounting is not required because the Bank is not the primary beneficiary of these VIEs for the periods presented. The Bank does not have the power to significantly affect the economic performance of any of these investments because it does not act as a key decision maker nor does it have the unilateral ability to replace a key decision maker. In addition, the Bank does not design, sponsor, transfer, service, or provide credit or liquidity support in any of its investments in VIEs. The Bank’s maximum loss exposure for these investments is limited to the carrying value.

Investment, Policy

Changes in circumstances may cause the Bank to change its intent to hold a certain security to maturity without calling into question its intent to hold other debt securities to maturity in the future. The sale or transfer of an HTM security because of certain changes in circumstances, such as evidence of significant deterioration in the issuers’ creditworthiness, is not considered to be inconsistent with its original classification. In addition, other events that are isolated, nonrecurring, or unusual for the Bank that could not have been reasonably anticipated may cause the Bank to sell or transfer an HTM security without necessarily calling into question its intent to hold other debt securities to maturity.In general, the Bank elects to transfer any PLRMBS that incurred a credit-related OTTI charge during the applicable period from the Bank’s held-to-maturity portfolio to its available-for-sale portfolio at their fair values. The Bank recognized an OTTI credit loss on these held-to-maturity PLRMBS, which the Bank believes is evidence of a significant decline in the issuers’ creditworthiness. The decline in the issuers’ creditworthiness is the basis for the transfers to the available-for-sale portfolio. These transfers allow the Bank the option to sell these securities prior to maturity in view of changes in interest rates, changes in prepayment risk, or other factors, while recognizing the Bank’s intent to hold these securities for an indefinite period of time. The Bank does not intend to sell its other-than-temporarily impaired securities and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.A significant input to the Bank’s cash flow analysis of its PLRMBS is the forecast of future housing price changes. The OTTI Governance Committee of the Federal Home Loan Banks (FHLBanks) developed a short-term housing price forecast with projected changes ranging from a decrease of 8.0% to an increase of 13.0% over the 12-month period beginning April 1, 2018. For the vast majority of markets, the projected short-term housing price changes range from an increase of 2.0% to an increase of 7.0%. Thereafter, a unique path is projected for each geographic area based on an internally developed framework derived from historical data. For all the PLRMBS in its AFS and HTM portfolios, the Bank does not intend to sell any security and it is not more likely than not that the Bank will be required to sell any security before its anticipated recovery of the remaining amortized cost basis.

Loans and Leases Receivable, Mortgage Banking Activities, Policy

Under the Mortgage Partnership Finance® (MPF®) Program, the Bank may purchase from members, for its own portfolio, conventional conforming fixed rate mortgage loans under the MPF Original product and mortgage loans insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA) under the MPF Government product. (“Mortgage Partnership Finance,” “MPF,” and “MPF Xtra” are registered trademarks of the FHLBank of Chicago.) In addition, the Bank may facilitate the purchase of conforming fixed rate mortgage loans from members for concurrent sale to Fannie Mae under the MPF Xtra® product; of jumbo fixed rate mortgage loans for concurrent sale to Redwood Residential Acquisition Corporation, a subsidiary of Redwood Trust, Inc., a real estate investment trust, under the MPF Direct product; and of government-insured or government-guaranteed mortgage loans that will be packaged into securities backed by the mortgage loans and guaranteed by Ginnie Mae under the MPF Government MBS product. When members sell mortgage loans under the MPF Xtra, MPF Direct, and MPF Government MBS products, the loans are sold to a third-party investor and are not recorded on the Bank’s Statements of Condition.

Loans and Leases Receivable, Allowance for Loan Losses Policy

The Bank invests in Federal funds sold with counterparties that are considered by the Bank to be of investment quality, and these investments are evaluated for purposes of an allowance for credit losses only if the investment is not paid when due. The Bank and any participating financial institution share in the credit risk of the loans sold by that institution as specified in a master agreement. Loans purchased under the MPF Program generally had a credit risk exposure at the time of purchase that, as determined by the MPF Program methodology, would be expected from an equivalent investment rated AA if purchased prior to April 2017, or rated BBB if purchased since April 2017, taking i

nto consideration the credit risk sharing structure mandated by the Finance Agency’s acquired member assets (AMA) regulation. The MPF Program structures potential credit losses on conventional MPF loans into layers with respect to each pool of loans purchased by the Bank under a single master commitment, as follows:

1. The first layer of protection against loss is the liquidation value of the real property securing the loan.

2. The next layer of protection comes from the primary mortgage insurance that is required for loans with a loan-to-value ratio greater than 80%, if still in place.

3. Losses that exceed the liquidation value of the real property and any primary mortgage insurance, up to an agreed-upon amount called the first loss account for each master commitment, are incurred by the Bank.

4. Losses in excess of the first loss account for each master commitment, up to an agreed-upon amount called the credit enhancement amount, are covered by the participating financial institution’s credit enhancement obligation at the time losses are incurred.

5. Losses in excess of the first loss account and the participating financial institution’s remaining credit enhancement for the master commitment, if any, are incurred by the Bank.

Allowance for Credit Losses on MPF Loans – The Bank evaluates the allowance for credit losses on MPF mortgage loans based on two components. The first component applies to each individual loan that is specifically identified as impaired. The Bank evaluates the exposure on these loans by considering the first layer of loss protection (the liquidation value of the real property securing the loan) and the availability and collectability of credit enhancements under the terms of each master commitment and records a provision for credit losses. The second component applies to loans that are not specifically identified as impaired and is based on the Bank’s estimate of probable credit losses on those loans as of the financial statement date. The Bank evaluates the credit loss exposure on a loan pool basis considering various observable data, such as delinquency statistics, past performance, current performance, loan portfolio characteristics, collateral valuations, industry data, and prevailing economic conditions. The Bank also considers the availability and collectability of credit enhancements from participating financial institutions or from mortgage insurers under the terms of each master commitment.

Loans and Leases Receivable, Troubled Debt Restructuring Policy

Troubled debt restructuring (TDR) is considered to have occurred when a concession is granted to the debtor for economic or legal reasons related to the debtor’s financial difficulties and that concession would not have been considered otherwise. An MPF loan considered a TDR is individually evaluated for impairment when determining its related allowance for credit losses. Credit loss is measured by factoring in expected cash flow shortfalls incurred as of the reporting date as well as the economic loss attributable to delaying the original contractual principal and interest due dates, if applicable.

Finance, Loan and Lease Receivables, Held-for-investment, Allowance and Nonperforming Loans, Allowance Policy

The Bank manages its credit exposure related to credit products through an integrated approach that generally provides for a credit limit to be established for each borrower, includes an ongoing review of each borrower’s financial condition, and is coupled with conservative collateral and lending policies to limit the risk of loss while taking into account borrowers’ needs for a reliable funding source. At June 30, 2018, and December 31, 2017, none of the Bank’s credit products were past due, on nonaccrual status, or considered impaired. There were no troubled debt restructurings related to credit products during the six months ended June 30, 2018, or during 2017.

Stockholders' Equity, Policy

Dividends on capital stock are recognized as dividends on the Statements of Capital Accounts, and dividends on mandatorily redeemable capital stock are recognized as interest expense on the Statements of Income.Under the Housing Act, the Director of the Finance Agency is responsible for setting the risk-based capital standards for the FHLBanks. The FHLBank Act and regulations governing the operations of the FHLBanks require that the Bank’s minimum capital stock requirement for shareholders must be sufficient to enable the Bank to meet its regulatory requirements for total capital, leverage capital, and risk-based capital. The Bank must maintain: (i) total regulatory capital in an amount equal to at least 4% of its total assets, (ii) leverage capital in an amount equal to at least 5% of its total assets, and (iii) permanent capital in an amount that is greater than or equal to its risk-based capital requirement. Because the Bank issues only Class B stock, regulatory capital and permanent capital for the Bank are both composed of retained earnings and Class B stock, including mandatorily redeemable capital stock (which is classified as a liability for financial reporting purposes). Regulatory capital and permanent capital do not include AOCI. Leverage capital is defined as the sum of permanent capital, weighted by a 1.5 multiplier, plus non-permanent capital.

The risk-based capital requirement is equal to the sum of the Bank’s credit risk, market risk, and operations risk capital requirements, all of which are calculated in accordance with the rules and regulations of the Finance Agency. The Finance Agency may require an FHLBank to maintain a greater amount of permanent capital than is required by the risk-based capital requirement as defined.

Segment Reporting, Policy

The Bank uses an analysis of financial results based on the financial components and adjusted net interest income of two operating segments, the advances-related business and the mortgage-related business, as well as other financial information, to review and assess financial performance and determine financial management strategies related to the operations of these two business segments. For purposes of segment reporting, adjusted net interest income includes income and expense associated with net settlements from economic hedges that are recorded in “Net gain/(loss) on derivatives and hedging activities” in other income and excludes interest expense that is recorded in “Mandatorily redeemable capital stock.” Other key financial information, such as any credit-related OTTI losses on the Bank’s PLRMBS, other expenses, and assessments, is not included in the segment reporting analysis, but is incorporated into the Bank’s overall assessment of financial performance.

For more information on these operating segments, see “Item 8. Financial Statements and Supplementary Data – Note 17 – Segment Information” in the Bank’s 2017 Form 10-K.

Derivatives, Embedded Derivatives

When a callable bond for which the Bank is the primary obligor is issued, the Bank may simultaneously enter into an interest rate swap (in which the Bank pays a variable rate and receives a fixed rate) with a call feature that mirrors the call option embedded in the bond (a sold callable swap). The Bank did not have any bonds with embedded features that met the requirements to separate the embedded feature from the host contract and designate the embedded feature as a stand-alone derivative at June 30, 2018, or December 31, 2017. The Bank has generally elected to account for certain bonds with embedded features under the fair value option, and these bonds are carried at fair value on the Statements of Condition.

Derivatives, Policy

The Bank is subject to credit risk as a result of potential nonperformance by counterparties to the interest rate exchange agreements. All of the Bank’s agreements governing uncleared derivative transactions contain master netting provisions to help mitigate the credit risk exposure to each counterparty. The Bank manages counterparty credit risk through credit analyses and collateral requirements and by following the requirements of the Bank’s risk management policies, credit guidelines, and Finance Agency and other regulations. The Bank also requires credit support agreements on all uncleared derivatives. For cleared derivatives, the clearinghouse is the Bank’s counterparty. The requirement that the Bank post initial and variation margin through a clearing agent, to the clearinghouse, exposes the Bank to institutional credit risk in the event that the clearing agent or the clearinghouse fails to meet its obligations. The use of cleared derivatives, however, mitigates the Bank’s overall credit risk exposure because a central counterparty is substituted for individual counterparties. Variation margin and initial margin are posted for changes in the value and risk profile of cleared derivatives. The Bank has analyzed the enforceability of offsetting rights applicable to its cleared derivative transactions and determined that the exercise of those offsetting rights by a non-defaulting party under these transactions should be upheld under applicable bankruptcy law and Commodity Futures Trading Commission rules in the event of a clearinghouse or clearing agent insolvency and under applicable clearinghouse rules upon a non-insolvency-based event of default of the clearinghouse or clearing agent. Based on this analysis, the Bank presents a net derivative receivable or payable for all of its transactions through a particular clearing agent with a particular clearinghouse.

Derivatives, Methods of Accounting, Hedging Derivatives

The Bank may enter into interest rate swaps (including callable, putable, and basis swaps); and cap and floor agreements (collectively, interest rate exchange agreements or derivatives). Most of the Bank’s interest rate exchange agreements are executed in conjunction with the origination of advances or the issuance of consolidated obligation bonds to create variable rate structures. The interest rate exchange agreements are generally executed at the same time the advances and bonds are transacted and generally have the same maturity dates as the related advances and bonds. The Bank transacts most of its derivatives with large banks and major broker-dealers. Some of these banks and broker-dealers or their affiliates buy, sell, and distribute consolidated obligations. Derivatives may be either uncleared or cleared. In an uncleared derivative transaction, the Bank’s counterparty is the executing bank or broker-dealer. In a cleared derivative transaction, the Bank may execute the transaction either directly with the executing bank or broker-dealer or on a swap execution facility, but in either case, the Bank’s counterparty is a derivatives clearing organization or clearinghouse once the derivative transaction has been accepted for clearing. The Bank is not a derivatives dealer and does not trade derivatives for short-term profit.

Additional uses of interest rate exchange agreements include: (i) offsetting embedded features in assets and liabilities, (ii) hedging anticipated issuance of debt, (iii) matching against consolidated obligation discount notes or bonds to create the equivalent of callable or non-callable fixed rate debt, (iv) modifying the repricing frequency of assets and liabilities, (v) matching against certain advances and consolidated obligations for which the Bank elected the fair value option, and (vi) exactly offsetting other derivatives cleared at a derivatives clearing organization. The Bank’s use of interest rate exchange agreements results in one of the following classifications: (i) a fair value hedge of an underlying financial instrument or (ii) an economic hedge of assets, liabilities, or other derivatives.

The Bank primarily uses the following derivative instruments:

Interest Rate Swaps – An interest rate swap is an agreement between two entities to exchange cash flows in the future. The agreement sets the dates on which the cash flows will be paid and the manner in which the cash flows will be calculated. One of the simplest forms of an interest rate swap involves the promise by one party to pay cash flows equivalent to the interest on a notional principal amount at a predetermined fixed rate for a given period of time. In return for this promise, the party receives cash flows equivalent to the interest on the same notional principal amount at a variable rate for the same period of time. The variable rate received or paid by the Bank in most interest rate exchange agreements is either indexed to LIBOR or to the overnight index swap rate.

Interest Rate Caps and Floors – In a cap agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate rises above a certain threshold (or cap) price. In a floor agreement, additional cash flow is generated if the price or interest rate of an underlying variable rate falls below a certain threshold (or floor) price. Caps and floors may be used in conjunction with assets or liabilities. In general, caps and floors are designed as protection against the interest rate on a variable rate asset or liability rising above or falling below a certain level.

Hedging Activities. The Bank documents at inception all relationships between derivatives designated as hedging instruments and hedged items, its risk management objectives and strategies for undertaking various hedge transactions, and its method of assessing hedge effectiveness. Derivatives designated as fair value hedges may be transacted to hedge: (i) assets and liabilities on the Statement of Condition, (ii) firm commitments, or (iii) forecasted transactions. The Bank also formally assesses (both at hedge inception and on an ongoing basis) whether the hedging

derivatives have been effective in offsetting changes in the fair value of hedged items attributable to the hedged risk and whether those derivatives may be expected to remain effective hedges in future periods. The Bank typically uses regression analyses or other statistical analyses to assess the effectiveness of its hedges. When it is determined that a derivative has not been or is not expected to be effective as a hedge, the Bank discontinues hedge accounting prospectively.

The Bank discontinues hedge accounting prospectively when: (i) it determines that the derivative is no longer effective in offsetting changes in the fair value of a hedged item (including hedged items such as firm commitments or forecasted transactions); (ii) the derivative and/or the hedged item expires or is sold, terminated, or exercised; (iii) it is no longer probable that the forecasted transaction will occur in the originally expected period; (iv) a hedged firm commitment no longer meets the definition of a firm commitment; (v) it determines that designating the derivative as a hedging instrument is no longer appropriate; or (vi) it decides to use the derivative to offset changes in the fair value of other derivatives or instruments carried at fair value.

The Bank may have the following types of hedged items:

Investments – The Bank may invest in U.S. Treasury and agency obligations, agency MBS, and the taxable portion of highly rated state or local housing finance agency obligations. In the past, the Bank has also invested in PLRMBS rated AAA at the time of acquisition. The interest rate and prepayment risk associated with these investment securities is managed through a combination of debt issuance and derivatives. The Bank may manage prepayment risk and interest rate risk by funding investment securities with consolidated obligations that have call features or by hedging the prepayment risk with a combination of consolidated obligations and callable swaps. The Bank may execute callable swaps in conjunction with the issuance of certain liabilities to create funding that is economically equivalent to fixed rate callable debt. Although these derivatives are economic hedges against prepayment risk and are designated to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment. Investment securities may be classified as trading, AFS, or HTM.

The Bank may also manage the risk arising from changing market prices or cash flows of investment securities classified as trading by entering into interest rate exchange agreements (economic hedges) that offset the changes in fair value or cash flows of the securities. The market value changes of both the trading securities and the associated interest rate exchange agreements are included in other income in the Statements of Income.

Advances – The Bank offers a wide range of advances structures to meet members’ funding needs. These advances may have maturities up to 30 years with fixed or adjustable rates and may include early termination features or options. The Bank may use derivatives to adjust the repricing and options characteristics of advances to more closely match the characteristics of the Bank’s funding liabilities. In general, whenever a member executes a fixed rate advance, fixed rate advance with embedded options, or a variable rate advance with embedded options, the Bank will simultaneously execute an interest rate exchange agreement with terms that offset the terms and any embedded options in the advance. The combination of the advance and the interest rate exchange agreement effectively creates a variable rate asset. Fixed rate advances without options that are offset with an interest rate exchange agreement are generally treated as fair value hedges. Advances with embedded options are recorded using the fair value option and are economically hedged using interest rate exchange agreements.

Mortgage Loans – The Bank’s investment portfolio includes fixed rate mortgage loans. The prepayment options embedded in mortgage loans can result in extensions or contractions in the expected repayment of these investments, depending on changes in estimated prepayment speeds. The Bank manages the interest rate risk and prepayment risk associated with fixed rate mortgage loans through a combination of debt issuance and derivatives. The Bank uses both callable and non-callable debt to achieve cash flow patterns and market value sensitivities for liabilities similar to those expected on the mortgage loans. Net income could be reduced if the Bank replaces prepaid mortgage loans with lower-yielding assets and the Bank’s higher funding costs are not reduced accordingly.

The Bank executes callable swaps in conjunction with the issuance of certain consolidated obligations to create funding that is economically equivalent to fixed rate callable bonds. Although these derivatives are economic hedges against the prepayment risk of specific loan pools and are referenced to individual liabilities, they do not receive either fair value or cash flow hedge accounting treatment.

Consolidated Obligations – Consolidated obligation bonds may be structured to meet the Bank’s or the investors’ needs. Common structures include fixed rate bonds with or without call options and adjustable rate bonds with or without embedded options. In general, when bonds are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that offset the terms and embedded options, if any, of the consolidated obligation bond. This combination of the consolidated obligation bond and the interest rate exchange agreement effectively creates an adjustable rate bond. The cost of this funding combination is generally lower than the cost that would be available through the issuance of an adjustable rate bond alone. These transactions generally receive fair value hedge accounting treatment.

When the Bank issues consolidated obligation discount notes, it may also simultaneously enter into an interest rate exchange agreement to convert the fixed rate discount note to an adjustable rate discount note. This type of hedge is treated as an economic hedge.

In addition, when certain consolidated obligation bonds for which the Bank has elected the fair value option are issued, the Bank simultaneously executes an interest rate exchange agreement with terms that economically offset the terms of the consolidated obligation bond. However, this type of hedge is treated as an economic hedge because these combinations do not meet the requirements for fair value hedge accounting treatment.

Offsetting Derivatives – The Bank enters into derivatives to offset the economic effect of other derivatives that are no longer designated to advances, investments, or consolidated obligations. Offsetting derivatives do not receive hedge accounting treatment and are separately marked to market through earnings. The net result of the accounting for these derivatives does not significantly affect the operating results of the Bank.

The notional amount of an interest rate exchange agreement serves as a factor in determining periodic interest payments or cash flows received and paid. However, the notional amount of derivatives represents neither the actual amounts exchanged nor the overall exposure of the Bank to credit risk and market risk. The risks of derivatives can be measured meaningfully on a portfolio basis by taking into account the counterparties, the types of derivatives, the items being hedged, and any offsets between the derivatives and the items being hedged.

Derivatives, Hedge Discontinuances

The Bank discontinues hedge accounting prospectively when: (i) it determines that the derivative is no longer effective in offsetting changes in the fair value of a hedged item (including hedged items such as firm commitments or forecasted transactions); (ii) the derivative and/or the hedged item expires or is sold, terminated, or exercised; (iii) it is no longer probable that the forecasted transaction will occur in the originally expected period; (iv) a hedged firm commitment no longer meets the definition of a firm commitment; (v) it determines that designating the derivative as a hedging instrument is no longer appropriate; or (vi) it decides to use the derivative to offset changes in the fair value of other derivatives or instruments carried at fair value.

Fair Value of Financial Instruments, Policy

The fair value hierarchy is used to prioritize the fair value methodologies and valuation techniques as well as the inputs to the valuation techniques used to measure fair value for assets and liabilities carried at fair value on the Statements of Condition. The inputs are evaluated and an overall level for the fair value measurement is determined. This overall level is an indication of market observability of the fair value measurement for the asset or liability. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). An entity must disclose the level within the fair value hierarchy in which the measurements are classified for all financial assets and liabilities measured on a recurring or non-recurring basis.

The application of the fair value hierarchy to the Bank’s financial assets and financial liabilities that are carried at fair value either on a recurring or non-recurring basis is as follows:

• Level 1 – Quoted prices (unadjusted) for identical assets or liabilities in an active market that the reporting entity can access on the measurement date.

• Level 2 – Inputs other than quoted prices within Level 1 that are observable inputs for the asset or liability, either directly or indirectly. If the asset or liability has a specified (contractual) term, a Level 2 input must be observable for substantially the full term of the asset or liability. Level 2 inputs include the following: (1) quoted prices for similar assets or liabilities in active markets; (2) quoted prices for identical or similar

assets or liabilities in markets that are not active; (3) inputs other than quoted prices that are observable for the asset or liability (e.g., interest rates and yield curves that are observable at commonly quoted intervals, and implied volatilities); and (4) inputs that are derived principally from or corroborated by observable market data by correlation or other means.

• Level 3 – Unobservable inputs for the asset or liability.

A financial instrument’s categorization within the valuation hierarchy is based on the lowest level of input that is significant to the fair value measurement.

The following assets and liabilities, including those for which the Bank has elected the fair value option, are carried at fair value on the Statements of Condition as of June 30, 2018:

• Trading securities

• AFS securities

• Certain advances

• Derivative assets and liabilities

• Certain consolidated obligation bonds

• Certain other assets

Investment Securities – MBS – To value its MBS, the Bank obtains prices from multiple designated third-party pricing vendors when available. The pricing vendors use various proprietary models to price these securities. The inputs to those models are derived from various sources including, but not limited to: benchmark yields, reported trades, dealer estimates, issuer spreads, prices on benchmark securities, bids, offers, and other market-related data. Since many securities do not trade on a daily basis, the pricing vendors use available information as applicable, such as benchmark yield curves, benchmarking of like securities, sector groupings, and matrix pricing, to determine the prices for individual securities. Each pricing vendor has an established challenge process in place for all security valuations, which facilitates resolution of price discrepancies identified by the Bank.

At least annually, the Bank conducts reviews of the multiple pricing vendors to update and confirm its understanding of the vendors’ pricing processes, methodologies, and control procedures.

The Bank’s valuation technique for estimating the fair values of its MBS first requires the establishment of a median vendor price for each security. If three prices are received, the middle price is the median price; if two prices are received, the average of the two prices is the median price; and if one price is received, it is the median price (and also the default fair value) subject to additional validation. All vendor prices that are within a specified tolerance threshold of the median price are included in the cluster of vendor prices that are averaged to establish a default fair value. All vendor prices that are outside the threshold (outliers) are subject to further analysis including, but not limited to, comparison to prices provided by an additional third-party valuation service, prices for similar securities and/or dealer estimates, or use of internal model prices, which are deemed to be reflective of all relevant facts and circumstances that a market participant would consider. Such analysis is also applied in those limited instances where no third-party vendor price or only one third-party vendor price is available in order to arrive at an

estimated fair value. If an outlier (or some other price identified in the analysis) is determined to be a better estimate of fair value, then the outlier (or the other price, as appropriate) is used as the fair value rather than the default fair value. If, instead, the analysis confirms that an outlier is (or outliers are) not representative of fair value and the default fair value is the best estimate, then the default fair value is used as the fair value.

If all vendor prices received for a security are outside the tolerance threshold level of the median price, then there is no default fair value, and the fair value is determined by an evaluation of all outlier prices (or the other prices, as appropriate) as described above.

As of June 30, 2018, multiple vendor prices were received for most of the Bank’s MBS, and the fair value estimates for most of those securities were determined in accordance with the Bank’s valuation technique based on these vendor prices. Based on the Bank’s reviews of the pricing methods employed by the third-party pricing vendors and the relative lack of dispersion among the vendor prices (or, in those instances in which there were outliers, the Bank’s additional analyses), the Bank believes that its fair value estimates are reasonable and that the fair value measurements are classified appropriately in the fair value hierarchy. Based on limited market liquidity for PLRMBS, the fair value measurements for these securities were classified as Level 3 within the fair value hierarchy.

Investment Securities – FFCB Bonds – The Bank estimates the fair values of these securities using the methodology described above for Investment Securities – MBS.

Advances Recorded Under the Fair Value Option – Because quoted prices are not available for advances, the fair values are measured using model-based valuation techniques (such as calculating the present value of future cash flows and reducing the amount for accrued interest receivable).

The Bank’s primary inputs for measuring the fair value of advances recorded under the fair value option are market-based consolidated obligation yield curve (CO Curve) inputs obtained from the Office of Finance. The CO Curve is then adjusted to reflect the rates on replacement advances with similar terms and collateral. These spread adjustments are not market-observable and are evaluated for significance in the overall fair value measurement and the fair value hierarchy level of the advance. The Bank obtains market-observable inputs for complex advances recorded under the fair value option. These inputs may include volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew). The discount rates used in these calculations are the replacement advance rates for advances with similar terms. Pursuant to the Finance Agency’s advances regulation, advances with an original term to maturity or repricing period greater than six months generally require a prepayment fee sufficient to make the Bank financially indifferent to the borrower’s decision to prepay the advances. The Bank determined that no adjustment is required to the fair value measurement of advances for prepayment fees. In addition, the Bank did not adjust its fair value measurement of advances recorded under the fair value option for creditworthiness primarily because advances were fully collateralized.

Other Assets – The estimated fair value of grantor trust assets is based on quoted market prices.

Derivative Assets and Liabilities – In general, derivative instruments transacted and held by the Bank for risk management activities are traded in over-the-counter markets where quoted market prices are not readily available. These derivatives are interest rate-related. For these derivatives, the Bank measures fair value using internally developed discounted cash flow models that use market-observable inputs, such as the overnight index swap (OIS) curve and volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew), adjusted for counterparty credit risk, as necessary.

The Bank is subject to credit risk because of the risk of potential nonperformance by its derivative counterparties. To mitigate this risk, the Bank executes uncleared derivative transactions only with highly rated derivative de

alers and major banks (derivative dealer counterparties) that meet the Bank’s eligibility criteria. In addition, the Bank has entered into master netting agreements and bilateral credit support agreements with all active derivative dealer counterparties that provide for delivery of collateral at specified levels to limit the Bank’s net unsecured credit exposure to these counterparties. Under these policies and agreements, the amount of unsecured credit exposure to an individual derivative dealer counterparty is either (i) limited to an absolute dollar credit exposure limit according to the counterparty’s long-term debt or deposit credit rating, as determined by rating agencies or (ii) set at zero (subject to a minimum transfer amount). The Bank clears its cleared derivative transactions only through clearing agents that meet the Bank’s eligibility requirements, and the Bank’s credit exposure to the clearinghouse is secured by variation margin received from the clearinghouse. All credit exposure from derivative transactions entered into by the Bank with member counterparties that are not derivative dealers must be fully secured by eligible collateral. The Bank evaluated the potential for the fair value of the instruments to be affected by counterparty credit risk and determined that no adjustments to the overall fair value measurements were required.

The fair values of the derivative assets and liabilities include accrued interest receivable/payable and cash collateral remitted to/received from counterparties. The estimated fair values of the accrued interest receivable/payable and cash collateral approximate their carrying values because of their short-term nature. The fair values of derivatives that met the netting requirements are presented on a net basis. If these netted amounts are positive, they are classified as an asset and, if negative, they are classified as a liability.

Consolidated Obligations Recorded Under the Fair Value Option – Because quoted prices in active markets are not generally available for identical liabilities, the Bank measures fair values using internally developed models that use primarily market-observable inputs. The Bank’s primary input for measuring the fair value of consolidated obligation bonds is a market-based CO Curve obtained from the Office of Finance. The Office of Finance constructs the CO Curve using the Treasury yield curve as a base curve, which is adjusted by indicative consolidated obligation spreads obtained from market-observable sources. These market indications are generally derived from pricing indications from dealers, historical pricing relationships, and market activity for similar liabilities, such as recent GSE issuances or secondary market activity. For consolidated obligation bonds with embedded options, the Bank also obtains market-observable inputs, such as volatility assumptions, which are market-based expectations of future interest rate volatility implied from current market prices for similar options (swaption volatility and volatility skew).

Adjustments may be necessary to reflect the Bank’s credit quality or the credit quality of the FHLBank System when valuing consolidated obligation bonds measured at fair value. The Bank monitors its own creditworthiness and the creditworthiness of the other FHLBanks and the FHLBank System to determine whether any adjustments are necessary for creditworthiness in its fair value measurement of consolidated obligation bonds. The credit ratings of the FHLBank System and any changes to the credit ratings are the basis for the Bank to determine whether the fair values of consolidated obligations recorded under the fair value option have been significantly affected during the reporting period by changes in the instrument-specific credit risk.

For instruments for which the fair value option has been elected, the related contractual interest income and contractual interest expense are recorded as part of net interest income on the Statements of Income. The remaining changes in fair value for instruments for which the fair value option has been elected are recorded as net gains/ (losses) on financial instruments held under the fair value option in the Statements of Income, except for changes in fair value related to instrument-specific credit risk which are recorded in AOCI on the Statements of Condition. The fair value option provides an entity with an irrevocable option to elect fair value as an alternative measurement for selected financial assets, financial liabilities, unrecognized firm commitments, and written loan commitments not previously carried at fair value. It requires an entity to display the fair value of those assets and liabilities for which the entity has chosen to use fair value on the face of the Statements of Condition. Fair value is used for both the initial and subsequent measurement of the designated assets, liabilities, and commitments, with the changes in fair value recognized in net income. Interest income and interest expense on advances and consolidated bonds carried at fair value are recognized solely on the contractual amount of interest due or unpaid. Any transaction fees or costs are immediately recognized in non-interest income or non-interest expense.

For more information on the Bank’s election of the fair value option, see “Item 8. Financial Statements and Supplementary Data – Note 19 – Fair Values” in the Bank’s 2017 Form 10-K.

The Bank has elected the fair value option for certain financial instruments to assist in mitigating potential earnings volatility that can arise from economic hedging relationships in which the carrying value of the hedged item is not adjusted for changes in fair value. The potential earnings volatility associated with using fair value only for the derivative is the Bank’s primary reason for electing the fair value option for financial assets and liabilities that do not qualify for hedge accounting or that have not previously met or may be at risk for not meeting the hedge effectiveness requirements.

Fair Value Transfer, Policy

For instruments carried at fair value, the Bank reviews the fair value hierarchy classifications on a quarterly basis. Changes in the observability of the valuation inputs may result in a reclassification of certain assets or liabilities. Such reclassifications are reported as transfers in or out as of the beginning of the quarter in which the changes occur. For the periods presented, the Bank did not have any reclassifications for transfers in or out of the fair value hierarchy levels.

Commitments and Contingencies, Policy

Delivery commitments are recorded at fair value as derivative assets or derivative liabilities in the Statements of Condition.

New Accounting Pronouncements, Policy

Targeted Improvements to Accounting for Hedging Activities. On August 28, 2017, the Financial Accounting Standards Board (FASB) issued amended guidance to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements. This guidance requires that, for fair value hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness be presented in the same income statement line that is used to present the earnings effect of the hedged item. For cash flow hedges, the entire change in the fair value of the hedging instrument included in the assessment of hedge effectiveness must be recorded in other comprehensive income. In addition, the amendments include certain targeted improvements to the assessment of hedge effectiveness and permit, among other things, the following:

• Measurement of the change in fair value of the hedged item on the basis of the benchmark rate component of the contractual coupon cash flows determined at hedge inception.

• Measurement of the hedged item in a partial-term fair value hedge of interest rate risk by assuming the hedged item has a term that reflects only the designated cash flows being hedged.

• Consideration only of how changes in the benchmark interest rate affect a decision to settle a prepayable instrument before its scheduled maturity in calculating the change in the fair value of the hedged item attributable to interest rate risk.

• For a cash flow hedge of interest rate risk of a variable-rate financial instrument, an entity could designate as the hedged risk the variability in cash flows attributable to the contractually specified interest rate.

This guidance becomes effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. The amended presentation and disclosure guidance is required only prospectively. The Bank does not intend to adopt this guidance early. The Bank is in the process of evaluating this guidance, and its effect on the Bank’s financial condition, results of operations, cash flows, and financial statement disclosures has not yet been determined.

Premium Amortization on Purchased Callable Debt Securities. On March 30, 2017, the FASB issued amended guidance to shorten the amortization period for certain purchased callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. This guidance affects all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date (that is, at a premium). This guidance is

effective for the Bank for interim and annual periods beginning on January 1, 2019, and early adoption is permitted. This guidance should be applied using a modified retrospective method through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The adoption of this guidance is not expected to have any effect on the Bank’s financial condition, results of operations, or cash flows.

Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. On March 10, 2017, the FASB issued amended guidance to improve the presentation of net periodic pension cost and net periodic postretirement benefit cost. The amendments require that employer disaggregate the service cost component from the other components of net benefit cost. The amendments also provide explicit guidance on how to present the service cost component and the other components of net benefit cost in the Statements of Income. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018, and was adopted retrospectively for the presentation of the service cost component and the other components of net periodic pension cost and net periodic postretirement benefit cost in the Statements of Income. The adoption of this guidance did not have a material effect on the Bank’s financial condition, results of operations, cash flows, or financial statement disclosures.

Classification of Certain Cash Receipts and Cash Payments. On August 26, 2016, the FASB issued amendments to clarify guidance on the classification of certain cash receipts and payments in the Statements of Cash Flows. This guidance is intended to reduce existing diversity in practice in how certain cash receipts and cash payments are presented and classified on the Statements of Cash Flows. This guidance became effective for the Bank for interim and annual periods beginning on January 1, 2018. The adoption of this guidance did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Measurement of Credit Losses on Financial Instruments. On June 16, 2016, the FASB issued amended guidance for the accounting for credit losses on financial instruments. The amendments require entities to measure expected credit losses based on relevant information about past events, including historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. An entity must use judgment in determining the relevant information and estimation methods that are appropriate under the circumstances. In addition, under the new guidance, a financial asset, or a group of financial assets, is required to be measured at its amortized cost to be presented at the net amount expected to be collected over the contractual term of the financial assets. Among other things, the guidance also requires:

• The Statement of Income to reflect the measurement of credit losses for newly recognized financial assets, as well as the expected increases or decreases of expected credit losses that have taken place during the period.

• The entities to determine the allowance for credit losses for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination that are measured at amortized cost basis in a similar manner to other financial assets measured at amortized cost basis. The initial allowance for credit losses is required to be added to the purchase price.

• Credit losses relating to available-for-sale debt securities to be recorded through an allowance for credit losses. The amendments limit the allowance for credit losses to the amount by which fair value is below amortized cost.

• Public entities to further disaggregate the current disclosure of credit quality indicators in relation to the amortized cost of financing receivables by the year of origination (i.e., vintage).

The guidance is effective for the Bank for interim and annual periods beginning on January 1, 2020. Early application is permitted as of the interim and annual reporting periods beginning after December 15, 2018. The guidance should be applied using a modified-retrospective approach, through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. In addition, the entities are required to use a prospective transition approach for purchased financial assets with a more-than-insignificant amount of credit deterioration since origination and for debt securities for which an other-than-temporary impairment had been recognized before the effective date. The Bank does not intend to adopt the guidance early. The Bank is in the process of evaluating this guidance and expects the adoption of the guidance may

result in an increase in the allowance for credit losses given the requirement to assess losses for the entire estimated life of the financial asset, including an allowance for debt securities. The effect on the Bank’s financial condition, results of operations, and cash flows will depend on the composition of financial assets held by the Bank at the adoption date, as well as on economic conditions and forecasts at that time.

Recognition of Lease Assets and Lease Liabilities. On February 25, 2016, the FASB issued guidance that requires recognition of lease assets and lease liabilities on the Statements of Condition and disclosure of key information about leasing arrangements. In particular, this guidance requires a lessee of operating or finance leases to recognize on the Statements of Condition a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for the lease term. However, for leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election not to recognize lease assets and lease liabilities. Under previous U.S. GAAP, a lessee was not required to recognize lease assets and lease liabilities arising from operating leases on the Statements of Condition. While this guidance does not fundamentally change lessor accounting, some changes have been made to align that guidance with the lessee guidance and other areas within U.S. GAAP.

The guidance becomes effective for the Bank for the interim and annual periods beginning on January 1, 2019, and early application is permitted. The guidance requires lessors and lessees to recognize and measure leases at the beginning of the earliest period presented in the financial statements using a modified retrospective approach. The Bank does not intend to adopt this guidance early. Upon adoption, the Bank expects to report higher assets and liabilities as a result of recording right-of-use assets and lease liabilities for its existing leases on the Statements of Condition. The Bank is in the process of evaluating this guidance, but its effect on the Bank’s financial condition, results of operations, and cash flows is not expected to be material.

Recognition and Measurement of Financial Assets and Financial Liabilities. On January 5, 2016, the FASB issued amended guidance on certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. This guidance includes, but is not limited to, the following:

• Requires equity investments (with certain exceptions) to be measured at fair value with changes in fair value recognized in net income;

• Requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments;

• Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset on the Statement of Condition or in the accompanying notes to the financial statements;

• Eliminates the requirement for public entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the Statement of Condition.

The guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. While the adoption of this guidance affected the Bank’s disclosures, the requirement to present the instrument-specific credit risk in other comprehensive income did not have any effect on the Bank’s financial condition, results of operations, or cash flows.

Revenue from Contracts with Customers. On May 28, 2014, the FASB issued guidance on revenue from contracts with customers. This guidance applies to all contracts with customers except those that are within the scope of certain other standards, such as financial instruments, certain guarantees, insurance contracts, and lease contracts. This guidance became effective for the Bank for the interim and annual periods beginning on January 1, 2018. Given that the majority of the Bank's financial instruments and other contractual rights that generate revenue are covered by other U.S. GAAP, the adoption of this guidance did not have any effect on the Bank's financial condition, results of operations, or cash flows.

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Trading Securities (Tables)

6 Months Ended

Jun. 30, 2018

Trading Securities [Abstract]

Trading Securities (and Certain Trading Assets)

The estimated fair value of trading securities as of June 30, 2018, and December 31, 2017, was as follows:

	June 30, 2018		December 31, 2017
Government-Sponsored Enterprises (GSEs) – Federal Farm Credit Bank (FFCB) bonds	$	657	$	1,158
MBS – Other U.S. obligations – Ginnie Mae	5		6
Total	$	662	$	1,164

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Available-for-Sale Securities (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of Available-for-sale Securities [Line Items]

Available-for-sale Securities

Available-for-sale (AFS) securities by major security type as of June 30, 2018, and December 31, 2017, were as follows:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	294	$	—		$	29	$	—	$	323
Alt-A, option ARM	639		(7		)	137		—		769
Alt-A, other	2,230		(13		)	201		—		2,418
Total	$	3,163	$	(20	)	$	367	$	—	$	3,510

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI			Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
PLRMBS:
Prime	$	335	$	—		$	29	$	—	$	364
Alt-A, option ARM	714		(10		)	130		—		834
Alt-A, other	2,447		(23		)	211		—		2,635
Total	$	3,496	$	(33	)	$	370	$	—	$	3,833

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings.

Available-for-sale Securities

Schedule of Available-for-sale Securities [Line Items]

Schedule of Unrealized Loss on Investments

The following table summarizes the AFS securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to

total gross unrealized losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of AFS securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	2	$	—	$	8	$	—	$	10	$	—
Alt-A, option ARM	—		—		137		7		137		7
Alt-A, other	49		—		277		13		326		13
Total	$	51	$	—	$	422	$	20	$	473	$	20

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
PLRMBS:
Prime	$	—	$	—	$	11	$	—	$	11	$	—
Alt-A, option ARM	—		—		144		10		144		10
Alt-A, other	5		—		356		23		361		23
Total	$	5	$	—	$	511	$	33	$	516	$	33

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Held-to-Maturity Securities (Tables)

6 Months Ended

Jun. 30, 2018

Schedule of Held-to-maturity Securities [Line Items]

Held-to-maturity Securities

The Bank classifies the following securities as HTM because the Bank has the positive intent and ability to hold these securities to maturity:

June 30, 2018
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	550	$	—		$	550	$	—	$	—		$	550
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	$	155	$	—		$	155	$	—	$	(8	)	$	147
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	678		—			678		—		(12		)	666
GSEs – single-family:
Freddie Mac	1,760		—			1,760		7		(33		)	1,734
Fannie Mae	3,098		—			3,098		23		(20		)	3,101
Subtotal GSEs – single-family	4,858		—			4,858		30		(53		)	4,835
GSEs – multifamily:
Freddie Mac	4,855		—			4,855		6		—			4,861
Fannie Mae	1,993		—			1,993		—		(1		)	1,992
Subtotal GSEs – multifamily	6,848		—			6,848		6		(1		)	6,853
Subtotal GSEs	11,706		—			11,706		36		(54		)	11,688
PLRMBS:
Prime	443		—			443		4		(4		)	443
Alt-A, other	242		(5		)	237		10		(2		)	245
Subtotal PLRMBS	685		(5		)	680		14		(6		)	688
Total MBS	13,069		(5		)	13,064		50		(72		)	13,042
Total	$	13,774	$	(5	)	$	13,769	$	50	$	(80	)	$	13,739

December 31, 2017
	Amortized Cost(1)		OTTI Recognized in AOCI(1)			Carrying Value(1)		Gross Unrecognized Holding Gains		Gross Unrecognized Holding Losses			Estimated Fair Value
Certificates of deposit	$	500	$	—		$	500	$	—	$	—		$	500
Housing finance agency bonds:
California Housing Finance Agency (CalHFA) bonds	187		—			187		—		(9		)	178
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	751		—			751		1		(1		)	751
GSEs – single-family:
Freddie Mac	2,039		—			2,039		12		(15		)	2,036
Fannie Mae	3,600		—			3,600		34		(8		)	3,626
Subtotal GSEs – single-family	5,639		—			5,639		46		(23		)	5,662
GSEs – multifamily:
Freddie Mac	4,651		—			4,651		6		(6		)	4,651
Fannie Mae	2,131		—			2,131		2		—			2,133
Subtotal GSEs – multifamily	6,782		—			6,782		8		(6		)	6,784
Subtotal GSEs	12,421		—			12,421		54		(29		)	12,446
PLRMBS:
Prime	521		—			521		5		(6		)	520
Alt-A, other	306		(6		)	300		11		(2		)	309
Subtotal PLRMBS	827		(6		)	821		16		(8		)	829
Total MBS	13,999		(6		)	13,993		71		(38		)	14,026
Total	$	14,686	$	(6	)	$	14,680	$	71	$	(47	)	$	14,704

(1) Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

Held-to-maturity Securities

Schedule of Held-to-maturity Securities [Line Items]

Schedule of Unrealized Loss on Investments

The following tables summarize the HTM securities with unrealized losses as of June 30, 2018, and December 31, 2017. The unrealized losses are aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position. Total unrealized losses in the following table will not agree to the total gross unrecognized holding losses in the table above. The unrealized losses in the following table also include non-credit-related OTTI losses recognized in AOCI. For OTTI analysis of HTM securities, see Note 6 – Other-Than-Temporary Impairment Analysis.

June 30, 2018
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	147	$	8	$	147	$	8
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	604		12		—		—		604		12
GSEs – single-family:
Freddie Mac	1,015		23		280		10		1,295		33
Fannie Mae	944		14		177		6		1,121		20
Subtotal GSEs – single-family	1,959		37		457		16		2,416		53
GSEs – multifamily:
Freddie Mac	444		—		—		—		444		—
Fannie Mae	950		1		133		—		1,083		1
Subtotal GSEs – multifamily	1,394		1		133		—		1,527		1
Subtotal GSEs	3,353		38		590		16		3,943		54
PLRMBS:
Prime	23		—		148		4		171		4
Alt-A, other	44		—		139		7		183		7
Subtotal PLRMBS	67		—		287		11		354		11
Total MBS	4,024		50		877		27		4,901		77
Total	$	4,024	$	50	$	1,024	$	35	$	5,048	$	85

December 31, 2017
	Less Than 12 Months				12 Months or More				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Housing finance agency bonds:
CalHFA bonds	$	—	$	—	$	178	$	9	$	178	$	9
MBS:
Other U.S. obligations – single-family:
Ginnie Mae	406		1		—		—		406		1
GSEs – single-family:
Freddie Mac	895		9		323		6		1,218		15
Fannie Mae	702		4		205		4		907		8
Subtotal GSEs – single-family	1,597		13		528		10		2,125		23
GSEs – multifamily:
Freddie Mac	1,058		6		—		—		1,058		6
Fannie Mae	456		—		—		—		456		—
Subtotal GSEs – multifamily	1,514		6		—		—		1,514		6
Subtotal GSEs	3,111		19		528		10		3,639		29
PLRMBS:
Prime	2		—		202		6		204		6
Alt-A, other	15		—		191		8		206		8
Subtotal PLRMBS	17		—		393		14		410		14
Total MBS	3,534		20		921		24		4,455		44
Total	$	3,534	$	20	$	1,099	$	33	$	4,633	$	53

Investments Classified by Contractual Maturity Date

The amortized cost, carrying value, and estimated fair value of non-MBS securities by contractual maturity (based on contractual final principal payment) and of MBS as of June 30, 2018, and December 31, 2017, are shown below. Expected maturities of MBS will differ from contractual maturities because borrowers generally have the right to prepay the underlying obligations without prepayment fees.

June 30, 2018
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	550	$	550	$	550
Due after 10 years	155		155		147
Subtotal	705		705		697
MBS	13,069		13,064		13,042
Total	$	13,774	$	13,769	$	13,739

December 31, 2017
Year of Contractual Maturity	Amortized Cost(1)		Carrying Value(1)		Estimated Fair Value
HTM securities other than MBS:
Due in 1 year or less	$	500	$	500	$	500
Due after 5 years through 10 years	12		12		12
Due after 10 years	175		175		166
Subtotal	687		687		678
MBS	13,999		13,993		14,026
Total	$	14,686	$	14,680	$	14,704

(1)

Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

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Other-Than-Temporary Impairment Analysis (Tables)

6 Months Ended

Jun. 30, 2018

Other than Temporary Impairment Losses, Investments [Abstract]

ScheduleOfTransfersFromHeldToMaturityToAvailableForSale [Table Text Block]

The following table summarizes the PLRMBS transferred from the Bank’s HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2018. The amounts shown represent the values when the securities were transferred from the HTM portfolio to the AFS portfolio. The Bank did not transfer any PLRMBS from its HTM portfolio to its AFS portfolio during the three and six months ended June 30, 2017.

	Three Months Ended June 30, 2018								Six Months Ended June 30, 2018
	Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value		Amortized Cost		OTTI Recognized in AOCI		Gross Unrecognized Holding Gains (Losses)		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Alt-A, other	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12
Total	$	12	$	—	$	—	$	12	$	12	$	—	$	—	$	12

Schedule of Significant Inputs In Measuring Other Than Temporary Impairments Recognized In Earnings

For securities determined to be other-than-temporarily impaired as of June 30, 2018 (securities for which the Bank determined that it does not expect to recover the entire amortized cost basis), the following table presents a summary of the significant inputs used in measuring the amount of credit loss recognized in earnings during the second quarter of 2018, and the related current credit enhancement for the Bank.

June 30, 2018
	Significant Inputs for Other-Than-Temporarily Impaired PLRMBS			Current
	Prepayment Rates	Default Rates	Loss Severities	Credit Enhancement
Year of Securitization	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)	Weighted Average % (1)
Alt-A, option ARM
2006	7.7	40.9	34.8	—
Total Alt-A, option ARM	7.7	40.9	34.8	—
Alt-A, other
2007	10.0	28.4	40.6	0.3
2006	10.6	25.4	39.4	20.6
2005	14.4	13.8	34.4	0.1
2004 and earlier	17.7	12.6	32.3	14.0
Total Alt-A, other	10.8	25.9	39.5	8.4
Total	10.4	27.8	38.9	7.4

(1) Weighted average percentage is based on unpaid principal balance.

Other than Temporary Impairment, Credit Losses Recognized in Earnings

The following table presents the credit-related OTTI, which is recognized in earnings, for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Balance, beginning of the period	$	1,113		$	1,169		$	1,129		$	1,183
Additional charges on securities for which OTTI was previously recognized(1)	5			6			6			9
Accretion of yield adjustments resulting from improvement of expected cash flows that are recognized over the remaining life of the securities(2)	(15		)	(17		)	(32		)	(34		)
Balance, end of the period	$	1,103		$	1,158		$	1,103		$	1,158

(1) For the three months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to April 1, 2018 and 2017, respectively. For the six months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to January 1, 2018 and 2017, respectively.

(2) The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $20 and $23 for the three months ended June 30, 2018 and 2017, respectively. The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively.

Schedule of Other Than Temporarily Impaired Charges Incurred During Life of the Securities

The following tables present the Bank’s AFS and HTM PLRMBS that incurred OTTI losses anytime during the life of the securities at June 30, 2018, and December 31, 2017, by loan collateral type:

June 30, 2018
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	356	$	294	$	323	$	—	$	—	$	—	$	—
Alt-A, option ARM	859		639		769		—		—		—		—
Alt-A, other	2,679		2,230		2,418		58		53		49		58
Total	$	3,894	$	3,163	$	3,510	$	58	$	53	$	49	$	58

December 31, 2017
	Available-for-Sale Securities						Held-to-Maturity Securities
	Unpaid Principal Balance		Amortized Cost		Estimated Fair Value		Unpaid Principal Balance		Amortized Cost		Carrying Value		Estimated Fair Value
Other-than-temporarily impaired PLRMBS backed by loans classified at origination as:
Prime	$	405	$	335	$	364	$	—	$	—	$	—	$	—
Alt-A, option ARM	953		714		834		—		—		—		—
Alt-A, other	2,927		2,447		2,635		64		59		53		63
Total	$	4,285	$	3,496	$	3,833	$	64	$	59	$	53	$	63

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Advances (Tables)

6 Months Ended

Jun. 30, 2018

Federal Home Loan Banks [Abstract]

Federal Home Loan Bank, Advances

Interest rate payment terms for advances at June 30, 2018, and December 31, 2017, are detailed below:

	June 30, 2018		December 31, 2017
Par value of advances:
Fixed rate:
Due within 1 year	$	23,275	$	31,767
Due after 1 year	17,185		13,022
Total fixed rate	40,460		44,789
Adjustable rate:
Due within 1 year	18,385		14,636
Due after 1 year	11,708		18,061
Total adjustable rate	30,093		32,697
Total par value	$	70,553	$	77,486

The Bank had advances outstanding, excluding overdrawn demand deposit accounts, at interest rates ranging from 0.86% to 8.57% at June 30, 2018, and 0.79% to 8.57% at December 31, 2017, as summarized below.

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	41,660		2.03	%	$	46,403		1.46	%
After 1 year through 2 years	14,131			2.19		16,287			1.61
After 2 years through 3 years	7,524			2.30		5,423			1.73
After 3 years through 4 years	4,596			2.42		6,719			1.69
After 4 years through 5 years	1,550			2.48		1,741			2.10
After 5 years	1,092			3.24		913			3.13
Total par value	70,553			2.14	%	77,486			1.57	%
Valuation adjustments for hedging activities	(161		)			(88		)
Valuation adjustments under fair value option	(78		)			(16		)
Total	$	70,314				$	77,382

The following table summarizes advances at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date for callable advances and by the earlier of the year of contractual maturity or next put date for putable advances.

 

	Earlier of Contractual Maturity or Next Call Date				Earlier of Contractual Maturity or Next Put Date
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
Within 1 year	$	45,877	$	52,624	$	41,665	$	46,403
After 1 year through 2 years	13,256		12,593		14,136		16,287
After 2 years through 3 years	7,224		7,973		7,524		5,423
After 3 years through 4 years	1,596		1,719		4,596		6,719
After 4 years through 5 years	1,544		1,729		1,550		1,741
After 5 years	1,056		848		1,082		913
Total par value	$	70,553	$	77,486	$	70,553	$	77,486

The following tables present the concentration in advances to the top five borrowers and their affiliates at June 30, 2018 and 2017. The tables also present the interest income from these advances before the impact of interest rate exchange agreements associated with these advances for the three and six months ended June 30, 2018 and 2017.

	June 30, 2018				Three Months Ended June 30, 2018				Six Months Ended June 30, 2018
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
MUFG Union Bank, National Association	$	13,400	19	%	$	60	16	%	$	104	14	%
First Republic Bank	10,250		14		46		13		81		11
JPMorgan Chase Bank, National Association(2)	9,361		13		54		15		104		14
Bank of the West	7,508		11		35		10		64		9
Wells Fargo Financial National Bank	4,000		6		21		6		38		6
Subtotal	44,519		63		216		60		391		54
Others	26,034		37		145		40		336		46
Total par value	$	70,553	100	%	$	361	100	%	$	727	100	%

	June 30, 2017				Three Months Ended June 30, 2017				Six Months Ended June 30, 2017
Name of Borrower	Advances Outstanding		Percentage of Total Advances Outstanding		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances		Interest Income from Advances(1)		Percentage of Total Interest Income from Advances
JPMorgan Chase Bank, National Association(2)	$	12,805	23	%	$	45	22	%	$	86	24	%
Bank of the West	9,110		17		19		10		33		9
First Republic Bank	7,700		14		28		14		48		14
MUFG Union Bank, National Association	4,600		8		6		3		8		2
CIT Bank, N.A.	2,396		4		8		4		16		4
Subtotal	36,611		66		106		53		191		53
Others	18,576		34		95		47		171		47
Total par value	$	55,187	100	%	$	201	100	%	$	362	100	%

(1) Interest income amounts exclude the interest effect of interest rate exchange agreements with derivative counterparties; as a result, the total interest income amounts will not agree to the Statements of Income. The amount of interest income from advances can vary depending on the amount outstanding, terms to maturity, interest rates, and repricing characteristics.

(2) Nonmember institution.

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Mortgage Loans Held for Portfolio (Tables)

6 Months Ended

Jun. 30, 2018

Mortgage Loans on Real Estate [Abstract]

Schedule of Participating Mortgage Loans

The following table presents information as of June 30, 2018, and December 31, 2017, on mortgage loans, all of which are secured by one- to four-unit residential properties and single-unit second homes.

	June 30, 2018			December 31, 2017
Fixed rate medium-term mortgage loans	$	20		$	32
Fixed rate long-term mortgage loans	2,618			1,973
Subtotal	2,638			2,005
Unamortized premiums	95			76
Unamortized discounts	(5		)	(5		)
Mortgage loans held for portfolio	2,728			2,076
Less: Allowance for credit losses	—			—
Total mortgage loans held for portfolio, net	$	2,728		$	2,076

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Allowance for Credit Losses (Tables)

6 Months Ended

Jun. 30, 2018

Loans and Leases Receivable Disclosure [Abstract]

Past Due Financing Receivables

The following table presents information on delinquent mortgage loans as of June 30, 2018, and December 31, 2017.

	June 30, 2018			December 31, 2017
	Recorded Investment(1)			Recorded Investment(1)
30 – 59 days delinquent	$	7		$	8
60 – 89 days delinquent	2			2
90 days or more delinquent	11			12
Total past due	20			22
Total current loans	2,723			2,065
Total mortgage loans	$	2,743		$	2,087
In process of foreclosure, included above(2)	$	3		$	3
Nonaccrual loans	$	11		$	12
Loans past due 90 days or more and still accruing interest	$	—		$	—
Serious delinquencies as a percentage of total mortgage loans outstanding(3)	0.41		%	0.59		%

(1) The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

(2) Includes loans for which the servicer has reported a decision to foreclose or to pursue a similar alternative, such as deed-in-lieu. Loans in process of foreclosure are included in past due or current loans depending on their delinquency status.

(3)

Represents loans that are 90 days or more past due or in the process of foreclosure as a percentage of the recorded investment of total mortgage loans outstanding.

Schedule of Allowance for Credit Losses and Recorded Investment by Impairment Methodology

The recorded investment by impairment methodology for individually and collectively evaluated impaired loans is as follows:

(In millions)	June 30, 2018		December 31, 2017
Recorded investment, end of the period:
Individually evaluated for impairment	$	9	$	9
Collectively evaluated for impairment	2,734		2,078
Total recorded investment	$	2,743	$	2,087

Schedule of Recorded Investment, Unpaid Principal Balance and Related Allowance of Impaired Loans

The recorded investment, unpaid principal balance, and related allowance of impaired loans individually evaluated for impairment are as follows:

	June 30, 2018						December 31, 2017
	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With no related allowance	$	9	$	9	$	—	$	9	$	9	$	—
With an allowance	—		—		—		—		—		—
Total	$	9	$	9	$	—	$	9	$	9	$	—

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Deposits (Tables)

6 Months Ended

Jun. 30, 2018

Deposits [Abstract]

Schedule of Deposit Liabilities by Component

Deposits as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018		December 31, 2017
Interest-bearing deposits:
Demand and overnight	$	354	$	263
Term	2		—
Total interest-bearing deposits	356		263
Non-interest-bearing deposits	23		18
Total	$	379	$	281

Schedule of Interest Rate Payment Terms On Deposit Liabilities

Deposits classified as demand, overnight, and other pay interest based on a daily interest rate. Term deposits pay interest based on a fixed rate determined at the issuance of the deposit. Interest rate payment terms for deposits at June 30, 2018, and December 31, 2017, are detailed in the following table:

	June 30, 2018				December 31, 2017
	Amount Outstanding		Weighted Average Interest Rate		Amount Outstanding		Weighted Average Interest Rate
Interest-bearing deposits:
Adjustable rate	$	354	1.60	%	$	263	1.10	%
Fixed rate	2		1.60		—		—
Total interest-bearing deposits	356				263
Non-interest-bearing deposits	23				18
Total	$	379			$	281

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Consolidated Obligations (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Schedule of Maturities of Long-term Debt

The following is a summary of the Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017.

	June 30, 2018					December 31, 2017
Contractual Maturity	Amount Outstanding			Weighted Average Interest Rate		Amount Outstanding			Weighted Average Interest Rate
Within 1 year	$	58,923		1.90	%	$	69,734		1.33	%
After 1 year through 2 years	6,226			1.88		6,461			1.42
After 2 years through 3 years	3,791			1.82		2,785			1.74
After 3 years through 4 years	1,165			1.93		2,058			1.78
After 4 years through 5 years	2,029			2.41		1,994			2.15
After 5 years	2,031			2.94		2,076			2.80
Total par value	74,165			1.94	%	85,108			1.41	%
Unamortized premiums	5					9
Unamortized discounts	(11		)			(11		)
Valuation adjustments for hedging activities	(84		)			(37		)
Fair value option valuation adjustments	(14		)			(6		)
Total	$	74,061				$	85,063

Schedule of Long-term Debt by Call Feature

The Bank’s participation in consolidated obligation bonds at June 30, 2018, and December 31, 2017, was as follows:  

	June 30, 2018		December 31, 2017
Par value of consolidated obligation bonds:
Non-callable	$	63,520	$	75,496
Callable	10,645		9,612
Total par value	$	74,165	$	85,108

Schedule of Maturities of Long-term Debt by Contractual or Next Call Date

The following is a summary of the Bank’s participation in consolidated obligation bonds outstanding at June 30, 2018, and December 31, 2017, by the earlier of the year of contractual maturity or next call date.

Earlier of Contractual Maturity or Next Call Date	June 30, 2018		December 31, 2017
Within 1 year	$	68,154	$	78,606
After 1 year through 2 years	5,125		5,326
After 2 years through 3 years	730		935
After 3 years through 4 years	5		85
After 4 years through 5 years	90		55
After 5 years	61		101
Total par value	$	74,165	$	85,108

Schedule of Short-term Debt

The Bank’s participation in consolidated obligation discount notes, all of which are due within one year, was as follows:

	June 30, 2018					December 31, 2017
	Amount Outstanding			Weighted Average Interest Rate (1)		Amount Outstanding			Weighted Average Interest Rate (1)
Par value	$	24,570		1.86	%	$	30,494		1.24	%
Unamortized discounts	(51		)			(54		)
Total	$	24,519				$	30,440

Schedule of Interest Rate Payment Terms for Debt

Interest rate payment terms for consolidated obligations at June 30, 2018, and December 31, 2017, are detailed in the following table. For information on the general terms and types of consolidated obligations outstanding, see “Item 8. Financial Statements and Supplementary Data – Note 12 – Consolidated Obligations” in the Bank’s 2017 Form 10-K.

	June 30, 2018		December 31, 2017
Par value of consolidated obligations:
Bonds:
Fixed rate	$	16,348	$	17,967
Adjustable rate	56,489		66,276
Step-up	953		565
Step-down	275		200
Range bonds	100		100
Total bonds, par value	74,165		85,108
Discount notes, par value	24,570		30,494
Total consolidated obligations, par value	$	98,735	$	115,602

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Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table summarizes the changes in AOCI for the six months ended June 30, 2018 and 2017:

	Net Non-Credit-Related OTTI Loss on AFS Securities			Net Non-Credit-Related OTTI Loss on HTM Securities			Pension and Postretirement Benefits			Total AOCI
Balance, December 31, 2016	$	136		$	(9	)	$	(16	)	$	111
Other comprehensive income/(loss) before reclassifications:
Non-credit-related OTTI loss	(3		)	—						(3		)
Net change in fair value	113									113
Accretion of non-credit-related OTTI loss				2						2
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	4			—						4
Net current period other comprehensive income/(loss)	114			2			—			116
Balance, June 30, 2017	$	250		$	(7	)	$	(16	)	$	227
Balance, December 31, 2017	$	337		$	(6	)	$	(13	)	$	318
Other comprehensive income/(loss) before reclassifications:
Net change in pension and postretirement benefits							1			1
Non-credit-related OTTI loss	(11		)	—						(11		)
Net change in fair value	20									20
Accretion of non-credit-related OTTI loss				1						1
Reclassification from other comprehensive income/(loss) to net income/(loss):
Non-credit-related OTTI to credit-related OTTI	1			—						1
Net current period other comprehensive income/(loss)	10			1			1			12
Balance, June 30, 2018	$	347		$	(5	)	$	(12	)	$	330

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Capital (Tables)

6 Months Ended

Jun. 30, 2018

Capital [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

As of June 30, 2018, and December 31, 2017, the Bank was in compliance with these capital rules and requirements as shown in the following table.

	June 30, 2018						December 31, 2017
	Required			Actual			Required			Actual
Risk-based capital	$	2,022		$	6,424		$	2,023		$	6,797
Total regulatory capital	$	4,248		$	6,424		$	4,935		$	6,797
Total regulatory capital ratio	4.00		%	6.05		%	4.00		%	5.51		%
Leverage capital	$	5,310		$	9,636		$	6,169		$	10,195
Leverage ratio	5.00		%	9.07		%	5.00		%	8.26		%

Schedule of Mandatorily Redeemable Capital Stock

The Bank had mandatorily redeemable capital stock totaling $255 outstanding to six institutions at June 30, 2018, and $309 outstanding to seven institutions at December 31, 2017. The change in mandatorily redeemable capital stock for the three and six months ended June 30, 2018 and 2017, was as follows:

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Balance at the beginning of the period	$	309		$	403		$	309		$	457
Reclassified from/(to) capital during the period	2			2			2			2
Redemption of mandatorily redeemable capital stock	—			—			—			(54		)
Repurchase of excess mandatorily redeemable capital stock	(56		)	(1		)	(56		)	(1		)
Balance at the end of the period	$	255		$	404		$	255		$	404

Schedule of Mandatorily Redeemable Capital Stock by Maturity Date

The following table presents mandatorily redeemable capital stock amounts by contractual redemption period at June 30, 2018, and December 31, 2017.

Contractual Redemption Period	June 30, 2018		December 31, 2017
After 1 year through 2 years	$	1	$	—
After 2 years through 3 years	251		306
Past contractual redemption date because of remaining activity(1)	3		3
Total	$	255	$	309

(1) Represents mandatorily redeemable capital stock that is past the end of the contractual redemption period because of outstanding activity.

Schedule of Restricted Retained Earnings

The following tables summarize the activity related to retained earnings for the three and six months ended June 30, 2018 and 2017:

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, March 31, 2017	$	850		$	20	$	1,750	$	530	$	2,300	$	3,150
Net income	63			1		—		16		17		80
Cash dividends on capital stock	(41		)									(41		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, March 31, 2018	$	2,681		$	—	$	—	$	592	$	592	$	3,273
Net income	84			—		—		20		20		104
Cash dividends on capital stock	(58		)									(58		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

				Restricted Retained Earnings Related to:
	Unrestricted Retained Earnings			Valuation Adjustments		Other		Joint Capital Enhancement Agreement		Total Restricted Retained Earnings		Total Retained Earnings
Balance, December 31, 2016	$	888		$	18	$	1,650	$	500	$	2,168	$	3,056
Net income	79			3		100		46		149		228
Cash dividends on capital stock	(95		)									(95		)
Balance, June 30, 2017	$	872		$	21	$	1,750	$	546	$	2,317	$	3,189
Balance, December 31, 2017	$	2,670		$	—	$	—	$	575	$	575	$	3,245
Net income	148			—		—		37		37		185
Cash dividends on capital stock	(111		)									(111		)
Balance, June 30, 2018	$	2,707		$	—	$	—	$	612	$	612	$	3,319

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Reconciliation of Operating Profit (Loss) from Segments to Consolidated

The following table presents the Bank’s adjusted net interest income by operating segment and reconciles total adjusted net interest income to income before the AHP assessment for the three and six months ended June 30, 2018 and 2017.

	Advances- Related Business		Mortgage- Related Business(1)		Adjusted Net Interest Income		Amortization of Basis Adjustments(2)			Income/(Expense) on Economic Hedges(3)			Interest Expense on Mandatorily Redeemable Capital Stock(4)		Net Interest Income After Mortgage Loan Loss Provision		Other Income/ (Loss)			Other Expense		Income Before AHP Assessment
Three months ended:
June 30, 2018	$	79	$	73	$	152	$	—		$	(7	)	$	5	$	154	$	5		$	43	$	116
June 30, 2017	57		81		138		—			(13		)	7		144		(16		)	39		89
Six months ended:
June 30, 2018	$	157	$	148	$	305	$	(1	)	$	(7	)	$	11	$	302	$	(3	)	$	92	$	207
June 30, 2017	105		164		269		(2		)	(25		)	18		278		96			119		255

(1) The mortgage-related business includes total accretion or amortization associated with other-than-temporarily impaired PLRMBS, which are recognized in interest income, totaled $20 and $23 for the three months ended June 30, 2018 and 2017; and totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively. The mortgage-related business does not include credit-related OTTI losses of $5 and $6 for the three months ended June 30, 2018 and 2017, and $6 and $9 for the six months ended June 30, 2018 and 2017, respectively.

(2) Represents amortization of amounts deferred for adjusted net interest income purposes only.

(3) The Bank includes income and expense associated with net settlements from economic hedges in adjusted net interest income in its analysis of financial performance for its two operating segments. For financial reporting purposes, the Bank does not include these amounts in net interest income in the Statements of Income, but instead records them in other income in “Net gain/(loss) on derivatives and hedging activities.”

(4)

The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments.

Schedule of Segment Assets by Segment

The following table presents total assets by operating segment at June 30, 2018, and December 31, 2017.

	Advances- Related Business		Mortgage- Related Business		Total Assets
June 30, 2018	$	86,849	$	19,359	$	106,208
December 31, 2017	103,426		19,959		123,385

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Derivatives and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table summarizes the notional amount and fair value of derivative instruments, including the effect of netting adjustments and cash collateral as of June 30, 2018, and December 31, 2017. For purposes of this disclosure, the derivative values include the fair value of derivatives and related accrued interest.

	June 30, 2018							December 31, 2017
	Notional Amount of Derivatives		Derivative Assets		Derivative Liabilities			Notional Amount of Derivatives		Derivative Assets			Derivative Liabilities
Derivatives designated as hedging instruments:
Interest rate swaps	$	34,853	$	8	$	43		$	24,270	$	92		$	27
Total	34,853		8		43			24,270		92			27
Derivatives not designated as hedging instruments:
Interest rate swaps	39,022		83		74			73,760		81			57
Interest rate caps and floors	1,563		2		—			1,563		1			1
Mortgage delivery commitments	16		—		—			16		—			—
Total	40,601		85		74			75,339		82			58
Total derivatives before netting and collateral adjustments	$	75,454	93		117			$	99,609	174			85
Netting adjustments and cash collateral(1)			48		(115		)			(91		)	(84		)
Total derivative assets and total derivative liabilities			$	141	$	2				$	83		$	1

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance

The following table presents the components of net gain/(loss) on derivatives and hedging activities as presented in the Statements of Income for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended						Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
	Gain/(Loss)			Gain/(Loss)			Gain/(Loss)			Gain/(Loss)
Derivatives designated as hedging instruments:
Interest rate swaps	$	2		$	(2	)	$	4		$	(2	)
Total net gain/(loss) related to fair value hedge ineffectiveness	2			(2		)	4			(2		)
Derivatives not designated as hedging instruments:
Economic hedges:
Interest rate swaps	18			(10		)	42			(8		)
Interest rate caps and floors	(1		)	(3		)	1			(5		)
Net settlements	(7		)	(13		)	(7		)	(25		)
Mortgage delivery commitments	5			9			9			12
Total net gain/(loss) related to derivatives not designated as hedging instruments	15			(17		)	45			(26		)
Other(1)	—			—			(1		)	—
Net gain/(loss) on derivatives and hedging activities	$	17		$	(19	)	$	48		$	(28	)

Schedule of Derivative Instruments By Type, Gain (Loss) in Statement of Financial Performance

The following tables present, by type of hedged item, the gains and losses on derivatives and the related hedged items in fair value hedging relationships and the impact of those derivatives on the Bank’s net interest income for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	10		$	(6	)	$	4		$	17		$	(10	)	$	8		$	(2	)	$	(8	)
Consolidated obligation bonds	(6		)	4			(2		)	(8		)	1			(1		)	—			6
Total	$	4		$	(2	)	$	2		$	9		$	(9	)	$	7		$	(2	)	$	(2	)

	Six Months Ended
	June 30, 2018												June 30, 2017
Hedged Item Type	Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)			Gain/(Loss) on Derivatives			Gain /(Loss) on Hedged Item			Net Fair Value Hedge Ineffectiveness			Effect of Derivatives on Net Interest Income(1)
Advances	$	80		$	(73	)	$	7		$	20		$	4		$	(6	)	$	(2	)	$	(17	)
Consolidated obligation bonds	(50		)	47			(3		)	(7		)	(10		)	10			—			15
Total	$	30		$	(26	)	$	4		$	13		$	(6	)	$	4		$	(2	)	$	(2	)

(1)

The net interest on derivatives in fair value hedge relationships is presented in the interest income/expense line item of the respective hedged item.

Schedule of Derivative Instruments, Offsetting Derivative Assets

The following table presents separately the fair value of derivative assets and derivative liabilities that have met the netting requirements, including the related collateral received from or pledged to counterparties as of June 30, 2018, and December 31, 2017.

	June 30, 2018							December 31, 2017
	Derivative Instruments Meeting Netting Requirements							Derivative Instruments Meeting Netting Requirements
	Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities		Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities
Derivative Assets
Uncleared	$	89	$	(87	)	$	2	$	35	$	(33	)	$	2
Cleared	4		135			139		139		(58		)	81
Total						$	141						$	83
Derivative Liabilities
Uncleared	$	113	$	(111	)	$	2	$	29	$	(28	)	$	1
Cleared	4		(4		)	—		56		(56		)	—
Total						$	2						$	1

Schedule of Derivative Instruments, Offsetting Derivative Liabilities

The following table presents separately the fair value of derivative assets and derivative liabilities that have met the netting requirements, including the related collateral received from or pledged to counterparties as of June 30, 2018, and December 31, 2017.

	June 30, 2018							December 31, 2017
	Derivative Instruments Meeting Netting Requirements							Derivative Instruments Meeting Netting Requirements
	Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities		Amount Recognized		Gross Amount of Netting Adjustments and Cash Collateral			Total Derivative Assets and Total Derivative Liabilities
Derivative Assets
Uncleared	$	89	$	(87	)	$	2	$	35	$	(33	)	$	2
Cleared	4		135			139		139		(58		)	81
Total						$	141						$	83
Derivative Liabilities
Uncleared	$	113	$	(111	)	$	2	$	29	$	(28	)	$	1
Cleared	4		(4		)	—		56		(56		)	—
Total						$	2						$	1

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Fair Value (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping

The following tables present the carrying value, the estimated fair value, and the fair value hierarchy level of the Bank’s financial instruments at June 30, 2018, and December 31, 2017. The Bank records trading securities, AFS

securities, derivative assets, derivative liabilities, certain advances, certain consolidated obligations, and certain other assets at fair value on a recurring basis, and on occasion certain mortgage loans held for portfolio and certain other assets at fair value on a nonrecurring basis. The Bank records all other financial assets and liabilities at amortized cost. Refer to the following tables for further details about the financial assets and liabilities held at fair value on either a recurring or non-recurring basis.

	June 30, 2018
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	44	$	44	$	44	$	—	$	—	$	—
Interest-bearing deposits	2,035		2,035		2,035		—		—		—
Securities purchased under agreements to resell	4,000		4,000		—		4,000		—		—
Federal funds sold	8,727		8,729		—		8,729		—		—
Trading securities	662		662		—		662		—		—
AFS securities	3,510		3,510		—		—		3,510		—
HTM securities	13,769		13,739		—		12,904		835		—
Advances	70,314		70,363		—		70,363		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,728		2,660		—		2,660		—		—
Accrued interest receivable	161		161		—		161		—		—
Derivative assets, net(1)	141		141		—		93		—		48
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	379		379		—		379		—		—
Consolidated obligations:
Bonds	74,061		73,839		—		73,839		—		—
Discount notes	24,519		24,518		—		24,518		—		—
Total consolidated obligations	98,580		98,357		—		98,357		—		—
Mandatorily redeemable capital stock	255		255		255		—		—		—
Accrued interest payable	131		131		—		131		—		—
Derivative liabilities, net(1)	2		2		—		117		—		(115		)
Other
Standby letters of credit	22		22		—		22		—		—

	December 31, 2017
	Carrying Value		Estimated Fair Value		Level 1		Level 2		Level 3		Netting Adjustments and Cash Collateral(1)
Assets
Cash and due from banks	$	31	$	31	$	31	$	—	$	—	$	—
Interest-bearing deposits	1,115		1,115		1,115		—		—		—
Securities purchased under agreements to resell	11,750		11,750		—		11,750		—		—
Federal funds sold	11,028		11,029		—		11,029		—		—
Trading securities	1,164		1,164		—		1,164		—		—
AFS securities	3,833		3,833		—		—		3,833		—
HTM securities	14,680		14,704		—		13,697		1,007		—
Advances	77,382		77,437		—		77,437		—		—
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans	2,076		2,075		—		2,075		—		—
Accrued interest receivable	119		119		—		119		—		—
Derivative assets, net(1)	83		83		—		174		—		(91		)
Other assets(2)	9		9		9		—		—		—
Liabilities
Deposits	281		281		—		281		—		—
Consolidated obligations:
Bonds	85,063		84,938		—		84,938		—		—
Discount notes	30,440		30,437		—		30,437		—		—
Total consolidated obligations	115,503		115,375		—		115,375		—		—
Mandatorily redeemable capital stock	309		309		309		—		—		—
Accrued interest payable	116		116		—		116		—		—
Derivative liabilities, net(1)	1		1		—		85		—		(84		)
Other
Standby letters of credit	19		19		—		19		—		—

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty.

(2) Represents publicly traded mutual funds held in a grantor trust.

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques

The tables below present the fair value of assets and liabilities, which are recorded on a recurring or nonrecurring basis at June 30, 2018, and December 31, 2017, by level within the fair value hierarchy.

June 30, 2018
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	657	$	—	$	—		$	657
MBS:
Other U.S. obligations – Ginnie Mae	—		5		—		—			5
Total trading securities	—		662		—		—			662
AFS securities:
PLRMBS	—		—		3,510		—			3,510
Total AFS securities	—		—		3,510		—			3,510
Advances(2)	—		6,083		—		—			6,083
Derivative assets, net: interest rate-related	—		93		—		48			141
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	6,838	$	3,510	$	48		$	10,405
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	1,404	$	—	$	—		$	1,404
Derivative liabilities, net: interest rate-related	—		117		—		(115		)	2
Total recurring fair value measurements – Liabilities	$	—	$	1,521	$	—	$	(115	)	$	1,406
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	2	$	—		$	2
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	2	$	—		$	2

December 31, 2017
	Fair Value Measurement Using:						Netting
	Level 1		Level 2		Level 3		Adjustments(1)			Total
Recurring fair value measurements – Assets:
Trading securities:
GSEs – FFCB bonds	$	—	$	1,158	$	—	$	—		$	1,158
MBS:
Other U.S. obligations – Ginnie Mae	—		6		—		—			6
Total trading securities	—		1,164		—		—			1,164
AFS securities:
PLRMBS	—		—		3,833		—			3,833
Total AFS securities	—		—		3,833		—			3,833
Advances(2)	—		6,431		—		—			6,431
Derivative assets, net: interest rate-related	—		174		—		(91		)	83
Other assets	9		—		—		—			9
Total recurring fair value measurements – Assets	$	9	$	7,769	$	3,833	$	(91	)	$	11,520
Recurring fair value measurements – Liabilities:
Consolidated obligation bonds(3)	$	—	$	949	$	—	$	—		$	949
Derivative liabilities, net: interest rate-related	—		85		—		(84		)	1
Total recurring fair value measurements – Liabilities	$	—	$	1,034	$	—	$	(84	)	$	950
Nonrecurring fair value measurements – Assets:(4)
Impaired mortgage loans held for portfolio	$	—	$	—	$	3	$	—		$	3
Total nonrecurring fair value measurements – Assets	$	—	$	—	$	3	$	—		$	3

(1) Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed by the Bank, with the same clearing agents and/or counterparty.

(2) Represents advances recorded under the fair value option at June 30, 2018, and December 31, 2017.

(3) Represents consolidated obligation bonds recorded under the fair value option at June 30, 2018, and December 31, 2017.

(4) The fair value information presented is as of the date the fair value adjustment was recorded during the six months ended June 30, 2018, and the year ended December 31, 2017.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The following tables present a reconciliation of the Bank’s AFS PLRMBS that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2018 and 2017.

	Three Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,686		$	4,294
Total gain/(loss) realized and unrealized included in:
Interest income	20			24
Net OTTI loss, credit-related	(5		)	(6		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	3			84
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(8		)	(1		)
Settlements	(198		)	(231		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	15		$	16

	Six Months Ended
	June 30, 2018			June 30, 2017
Balance, beginning of the period	$	3,833		$	4,489
Total gain/(loss) realized and unrealized included in:
Interest income	42			46
Net OTTI loss, credit-related	(6		)	(9		)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI	20			113
Net amount of OTTI loss reclassified to/(from) other income/(loss)	(10		)	1
Settlements	(381		)	(476		)
Transfers of HTM securities to AFS securities	12			—
Balance, end of the period	$	3,510		$	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period	$	36		$	36

Fair Value, Option, Quantitative Disclosures

The following table presents the difference between the aggregate remaining contractual principal balance outstanding and aggregate fair value of advances and consolidated obligation bonds for which the Bank elected the fair value option at June 30, 2018, and December 31, 2017:

	June 30, 2018							December 31, 2017
	Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance			Principal Balance		Fair Value		Fair Value Over/(Under) Principal Balance
Advances(1)	$	6,161	$	6,083	$	(78	)	$	6,447	$	6,431	$	(16	)
Consolidated obligation bonds	1,418		1,404		(14		)	955		949		(6		)

(1)

At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status. The following tables summarize the activity related to financial assets and liabilities for which the Bank elected the fair value option during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,637		$	1,315		$	3,816		$	2,236
New transactions elected for fair value option	342			89			1,772			95
Maturities and terminations	(882		)	—			(107		)	(1,215		)
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option	(14		)	(2		)	8			3
Change in accrued interest	—			2			1			(1		)
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

	Six Months Ended
	June 30, 2018						June 30, 2017
	Advances			Consolidated Obligation Bonds			Advances			Consolidated Obligation Bonds
Balance, beginning of the period	$	6,431		$	949		$	3,719		$	1,507
New transactions elected for fair value option	1,564			463			2,060			835
Maturities and terminations	(1,850		)	—			(299		)	(1,230		)
Net gain/(loss) from changes in fair value recognized in earnings	(63		)	(10		)	9			5
Change in accrued interest	1			2			1			1
Balance, end of the period	$	6,083		$	1,404		$	5,490		$	1,118

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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Off-Balance Sheet Commitments

Off-balance sheet commitments as of June 30, 2018, and December 31, 2017, were as follows:

	June 30, 2018						December 31, 2017
	Expire Within One Year		Expire After One Year		Total		Expire Within One Year		Expire After One Year		Total
Standby letters of credit outstanding	$	12,737	$	4,083	$	16,820	$	12,910	$	3,240	$	16,150
Commitments to fund additional advances	—		—		—		1		—		1
Commitments to issue consolidated obligation discount notes, par	57		—		57		134		—		134
Commitments to issue consolidated obligation bonds, par	—		—		—		595		—		595
Commitments to purchase mortgage loans	16		—		16		16		—		16

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Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks (Tables)

6 Months Ended

Jun. 30, 2018

Related Party Transactions [Abstract]

Transactions with Certain Members and Nonmembers

The following tables set forth information at the dates and for the periods indicated with respect to transactions with members that have an officer or director serving on the Bank’s Board of Directors.

	June 30, 2018		December 31, 2017
Assets:
Advances	$	3,811	$	3,072
Mortgage loans held for portfolio	12		13
Accrued interest receivable	7		5
Liabilities:
Deposits	$	26	$	3
Capital:
Capital Stock	$	142	$	126

	Three Months Ended				Six Months Ended
	June 30, 2018		June 30, 2017		June 30, 2018		June 30, 2017
Interest Income:
Advances	$	17	$	10	$	31	$	19

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Trading Securities (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities	[1]	$ 662		$ 662		$ 1,164
Net unrealized gain/(loss) on trading securities		0	$ (1)	(1)	$ 0
Government-Sponsored Enterprises (GSEs) – Federal Farm Credit Bank (FFCB) bonds
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities		657		657		1,158
GSEs – single-family: | MBS – Other U.S. obligations – Ginnie Mae
Schedule of Trading Securities and Other Trading Assets [Line Items]
Trading securities		$ 5		$ 5		$ 6

[1] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

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Available-for-Sale Securities (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Credit-related OTTI	$ 1,103	$ 1,113	$ 1,129	$ 1,158	$ 1,169	$ 1,183
Available-for-sale Securities | Collateralized Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Credit-related OTTI	$ 742		$ 801

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Available-for-Sale Securities (AFS Securities by Major Security Type) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	[1]	$ 3,163	$ 3,496
OTTI Recognized in AOCI		(20)	(33)
Gross Unrealized Gains		367	370
Gross Unrealized Losses		0	0
Estimated Fair Value	[2]	3,510	3,833
Subtotal PLRMBS | Prime | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		294	335
OTTI Recognized in AOCI		0	0
Gross Unrealized Gains		29	29
Gross Unrealized Losses		0	0
Estimated Fair Value		323	364
Subtotal PLRMBS | Alt-A, option ARM | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		639	714
OTTI Recognized in AOCI		(7)	(10)
Gross Unrealized Gains		137	130
Gross Unrealized Losses		0	0
Estimated Fair Value		769	834
Subtotal PLRMBS | Alt-A, other | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		2,230	2,447
OTTI Recognized in AOCI		(13)	(23)
Gross Unrealized Gains		201	211
Gross Unrealized Losses		0	0
Estimated Fair Value		$ 2,418	$ 2,635

[1] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings.

[2] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

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Available-for-Sale Securities (Summary of Securities with Unrealized Losses) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months: Estimated Fair Value	$ 51	$ 5
Less Than 12 Months: Unrealized Losses	0	0
12 Months or More: Estimated Fair Value	422	511
12 Months or More: Unrealized Losses	20	33
Estimated Fair Value	473	516
Unrealized Losses	20	33
Prime | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months: Estimated Fair Value	2	0
Less Than 12 Months: Unrealized Losses	0	0
12 Months or More: Estimated Fair Value	8	11
12 Months or More: Unrealized Losses	0	0
Estimated Fair Value	10	11
Unrealized Losses	0	0
Alt-A, option ARM | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months: Estimated Fair Value	0	0
Less Than 12 Months: Unrealized Losses	0	0
12 Months or More: Estimated Fair Value	137	144
12 Months or More: Unrealized Losses	7	10
Estimated Fair Value	137	144
Unrealized Losses	7	10
Alt-A, other | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months: Estimated Fair Value	49	5
Less Than 12 Months: Unrealized Losses	0	0
12 Months or More: Estimated Fair Value	277	356
12 Months or More: Unrealized Losses	13	23
Estimated Fair Value	326	361
Unrealized Losses	$ 13	$ 23

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Held-to-Maturity Securities (Classification of Held-to-Maturity Securities) (Details) - USD ($) $ in Millions		Jun. 30, 2018		Mar. 31, 2018	Dec. 31, 2017		Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	$ 13,774			$ 14,686
OTTI Recognized in AOCI	[1]	(5)			(6)
HTM securities, Carrying Value	[1],[2]	13,769			14,680
Gross Unrecognized Holding Gain		50			71
Gross Unrecognized Holding Loss		(80)			(47)
HTM Securities, Fair Value		13,739			14,704
Credit-related OTTI		1,103		$ 1,113	1,129		$ 1,158	$ 1,169	$ 1,183
Certificates of deposit
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		550	[1]		500
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		550	[1]		500
Gross Unrecognized Holding Gain		0			0
Gross Unrecognized Holding Loss		0			0
HTM Securities, Fair Value		550			500
California Housing Finance Agency (CalHFA) bonds
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		155	[1]		187
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		155	[1]		187
Gross Unrecognized Holding Gain		0			0
Gross Unrecognized Holding Loss		(8)			(9)
HTM Securities, Fair Value		147			178
Ginnie Mae
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		678	[1]		751
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		678	[3]		751
Gross Unrecognized Holding Gain		0			1
Gross Unrecognized Holding Loss		(12)			(1)
HTM Securities, Fair Value		666			751
Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	11,706			12,421
OTTI Recognized in AOCI	[1]	0			0
HTM securities, Carrying Value	[1]	11,706			12,421
Gross Unrecognized Holding Gain		36			54
Gross Unrecognized Holding Loss		(54)			(29)
HTM Securities, Fair Value		11,688			12,446
Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	685			827
OTTI Recognized in AOCI	[1]	(5)			(6)
HTM securities, Carrying Value	[1]	680			821
Gross Unrecognized Holding Gain		14			16
Gross Unrecognized Holding Loss		(6)			(8)
HTM Securities, Fair Value		688			829
Total MBS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	13,069			13,999
OTTI Recognized in AOCI	[1]	(5)			(6)
HTM securities, Carrying Value	[1]	13,064			13,993
Gross Unrecognized Holding Gain		50			71
Gross Unrecognized Holding Loss		(72)			(38)
HTM Securities, Fair Value		13,042			14,026
Held-to-maturity Securities, Premiums		16			19
Held-to-maturity Securities, Discounts		21			24
Total MBS | Held-to-maturity Securities
Schedule of Held-to-maturity Securities [Line Items]
Credit-related OTTI		7			7
GSEs – single-family: | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	4,858			5,639
OTTI Recognized in AOCI	[1]	0			0
HTM securities, Carrying Value	[1]	4,858			5,639
Gross Unrecognized Holding Gain		30			46	[1]
Gross Unrecognized Holding Loss		(53)			(23)	[1]
HTM Securities, Fair Value		4,835			5,662	[1]
GSEs – single-family: | Freddie Mac | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		1,760	[1]		2,039
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		1,760	[1]		2,039
Gross Unrecognized Holding Gain		7			12
Gross Unrecognized Holding Loss		(33)			(15)
HTM Securities, Fair Value		1,734			2,036
GSEs – single-family: | Fannie Mae | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		3,098	[1]		3,600
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		3,098	[1]		3,600
Gross Unrecognized Holding Gain		23			34
Gross Unrecognized Holding Loss		(20)			(8)
HTM Securities, Fair Value		3,101			3,626
GSEs – multifamily: | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	6,848			6,782
OTTI Recognized in AOCI	[1]	0			0
HTM securities, Carrying Value	[1]	6,848			6,782
Gross Unrecognized Holding Gain		6			8
Gross Unrecognized Holding Loss		(1)			(6)
HTM Securities, Fair Value		6,853			6,784
GSEs – multifamily: | Freddie Mac | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		4,855	[1]		4,651
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		4,855	[1]		4,651
Gross Unrecognized Holding Gain		6			6
Gross Unrecognized Holding Loss		0			(6)
HTM Securities, Fair Value		4,861			4,651
GSEs – multifamily: | Fannie Mae | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		1,993	[1]		2,131
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		1,993	[1]		2,131
Gross Unrecognized Holding Gain		0			2
Gross Unrecognized Holding Loss		(1)			0
HTM Securities, Fair Value		1,992			2,133
Prime | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		443	[1]		521
OTTI Recognized in AOCI		0	[1]		0
HTM securities, Carrying Value		443	[1]		521
Gross Unrecognized Holding Gain		4			5
Gross Unrecognized Holding Loss		(4)			(6)
HTM Securities, Fair Value		443			520
Alt-A, other | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost		242	[1]		306
OTTI Recognized in AOCI		(5)	[1]		(6)
HTM securities, Carrying Value		237	[1]		300
Gross Unrecognized Holding Gain		10			11
Gross Unrecognized Holding Loss		(2)			(2)
HTM Securities, Fair Value		$ 245			$ 309

[1] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

[2] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

[3] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

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Held-to-Maturity Securities (Securities with Unrealized Losses) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	$ 4,024	$ 3,534
Less Than 12 Months, Unrealized losses	50	20
12 Months or More, Estimated Fair Value	1,024	1,099
12 Months Or More, Unrealized losses	35	33
Total, Estimated Fair Value	5,048	4,633
Total, Unrealized Losses	85	53
CalHFA bonds [Member]
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	0	0
Less Than 12 Months, Unrealized losses	0	0
12 Months or More, Estimated Fair Value	147	178
12 Months Or More, Unrealized losses	8	9
Total, Estimated Fair Value	147	178
Total, Unrealized Losses	8	9
Ginnie Mae
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	604	406
Less Than 12 Months, Unrealized losses	12	1
12 Months or More, Estimated Fair Value	0	0
12 Months Or More, Unrealized losses	0	0
Total, Estimated Fair Value	604	406
Total, Unrealized Losses	12	1
Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	3,353	3,111
Less Than 12 Months, Unrealized losses	38	19
12 Months or More, Estimated Fair Value	590	528
12 Months Or More, Unrealized losses	16	10
Total, Estimated Fair Value	3,943	3,639
Total, Unrealized Losses	54	29
Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	67	17
Less Than 12 Months, Unrealized losses	0	0
12 Months or More, Estimated Fair Value	287	393
12 Months Or More, Unrealized losses	11	14
Total, Estimated Fair Value	354	410
Total, Unrealized Losses	11	14
Total MBS
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	4,024	3,534
Less Than 12 Months, Unrealized losses	50	20
12 Months or More, Estimated Fair Value	877	921
12 Months Or More, Unrealized losses	27	24
Total, Estimated Fair Value	4,901	4,455
Total, Unrealized Losses	77	44
GSEs – single-family: | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	1,959	1,597
Less Than 12 Months, Unrealized losses	37	13
12 Months or More, Estimated Fair Value	457	528
12 Months Or More, Unrealized losses	16	10
Total, Estimated Fair Value	2,416	2,125
Total, Unrealized Losses	53	23
GSEs – single-family: | Freddie Mac | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	1,015	895
Less Than 12 Months, Unrealized losses	23	9
12 Months or More, Estimated Fair Value	280	323
12 Months Or More, Unrealized losses	10	6
Total, Estimated Fair Value	1,295	1,218
Total, Unrealized Losses	33	15
GSEs – single-family: | Fannie Mae | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	944	702
Less Than 12 Months, Unrealized losses	14	4
12 Months or More, Estimated Fair Value	177	205
12 Months Or More, Unrealized losses	6	4
Total, Estimated Fair Value	1,121	907
Total, Unrealized Losses	20	8
GSEs – multifamily: | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	1,394	1,514
Less Than 12 Months, Unrealized losses	1	6
12 Months or More, Estimated Fair Value	133	0
12 Months Or More, Unrealized losses	0	0
Total, Estimated Fair Value	1,527	1,514
Total, Unrealized Losses	1	6
GSEs – multifamily: | Freddie Mac | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	444	1,058
Less Than 12 Months, Unrealized losses	0	6
12 Months or More, Estimated Fair Value	0	0
12 Months Or More, Unrealized losses	0	0
Total, Estimated Fair Value	444	1,058
Total, Unrealized Losses	0	6
GSEs – multifamily: | Fannie Mae | Subtotal GSEs – single-family
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	950	456
Less Than 12 Months, Unrealized losses	1	0
12 Months or More, Estimated Fair Value	133	0
12 Months Or More, Unrealized losses	0	0
Total, Estimated Fair Value	1,083	456
Total, Unrealized Losses	1	0
Prime | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	23	2
Less Than 12 Months, Unrealized losses	0	0
12 Months or More, Estimated Fair Value	148	202
12 Months Or More, Unrealized losses	4	6
Total, Estimated Fair Value	171	204
Total, Unrealized Losses	4	6
Alt-A, other | Subtotal PLRMBS | Residential Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Less Than 12 Months, Estimated Fair Value	44	15
Less Than 12 Months, Unrealized losses	0	0
12 Months or More, Estimated Fair Value	139	191
12 Months Or More, Unrealized losses	7	8
Total, Estimated Fair Value	183	206
Total, Unrealized Losses	$ 7	$ 8

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Held-to-Maturity Securities (Redemption Terms) (Details) - USD ($) $ in Millions		Jun. 30, 2018		Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	$ 13,774		$ 14,686
HTM securities, Carrying Value	[1],[2]	13,769		14,680
HTM Securities, Fair Value		13,739		14,704
Other Than Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Due in 1 year or less, Amortized Cost		550	[3]	500
Due in 1 year or less, Carrying Value		550	[3]	500
Due in 1 year or less, Fair Value		550		500
Due after 5 years through 10 years, Amortized Cost				12
Due after 5 years through 10 years, Carrying Value				12
Due after 5 years through 10 years, Estimated Fair Value				12
Due after 10 years, Amortized Cost		155	[3]	175
Due after 10 years, Carrying Value		155	[3]	175
Due after 10 years, Estimated Fair Value		147		166
Amortized Cost		705		687
HTM securities, Carrying Value		705		687
HTM Securities, Fair Value		697		678
Collateralized Mortgage Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	[1]	13,069		13,999
HTM securities, Carrying Value	[1]	13,064		13,993
HTM Securities, Fair Value		$ 13,042		$ 14,026

[1] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

[2] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

[3] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

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Other-Than-Temporary Impairment Analysis (Narrative) (Details)	6 Months Ended
	Jun. 30, 2018
Other than Temporary Impairment Losses, Investments [Abstract]
Period Assumed For Housing Markets That Have Reached Trough	12 months
Projected Change In The Twelve Month Housing Price Percentage Rate, Maximum Decrease	8.00%
Projected Change In The Twelve Month Housing Price Percentage Rate, Maximum Increase	13.00%
Projected Change In The Short-term Housing Price Percentage Rate, Minimum Increase In Vast Majority Of Markets	2.00%
Projected Change In The Short-term Housing Price Percentage Rate, Maximum Increase In Vast Majority Of Markets	7.00%

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Other-Than-Temporary Impairment Analysis (Significant Inputs for Other-Than-Temporarily Impaired PLRMBS) (Details) - Residential Mortgage Backed Securities - Subtotal PLRMBS	6 Months Ended
	Jun. 30, 2018	[1]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	10.40%
Default Rate Weighted Average	27.80%
Loss Severity Weighted Average	38.90%
Credit Enhancements Weighted Average	7.40%
Alt-A, option ARM
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	7.70%
Default Rate Weighted Average	40.90%
Loss Severity Weighted Average	34.80%
Credit Enhancements Weighted Average	0.00%
Alt-A, other
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	10.80%
Default Rate Weighted Average	25.90%
Loss Severity Weighted Average	39.50%
Credit Enhancements Weighted Average	8.40%
2007 | Alt-A, other
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	10.00%
Default Rate Weighted Average	28.40%
Loss Severity Weighted Average	40.60%
Credit Enhancements Weighted Average	0.30%
Securitization in 2006 [Member] | Alt-A, option ARM
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	7.70%
Default Rate Weighted Average	40.90%
Loss Severity Weighted Average	34.80%
Credit Enhancements Weighted Average	0.00%
Securitization in 2006 [Member] | Alt-A, other
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	10.60%
Default Rate Weighted Average	25.40%
Loss Severity Weighted Average	39.40%
Credit Enhancements Weighted Average	20.60%
2005 | Alt-A, other
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	14.40%
Default Rate Weighted Average	13.80%
Loss Severity Weighted Average	34.40%
Credit Enhancements Weighted Average	0.10%
2004 and Earlier | Alt-A, other
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Prepayment Weighted Average	17.70%
Default Rate Weighted Average	12.60%
Loss Severity Weighted Average	32.30%
Credit Enhancements Weighted Average	14.00%

[1] Weighted average percentage is based on unpaid principal balance.

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Other-Than-Temporary Impairment Analysis (OTTI Rollforward) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other than Temporary Impairment Losses, Investments [Abstract]
OTTI PLRMBS, Total accretion or amortization recognized in interest income		$ 20	$ 23	$ 42	$ 46
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Balance, beginning of the period		1,113	1,169	1,129	1,183
Additional charges on securities for which OTTI was previously recognized	[1]	5	6	6	9
Accretion of yield adjustments resulting from improvement of expected cash flows that are recognized over the remaining life of the securities	[2]	(15)	(17)	(32)	(34)
Balance, end of the period		$ 1,103	$ 1,158	$ 1,103	$ 1,158

[1] For the six months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to January 1, 2018 and 2017, respectively.

[2] The total net accretion/(amortization) associated with other-than-temporarily impaired PLRMBS (amount recognized in interest income) totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively.

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Other-Than-Temporary Impairment Analysis (Transfers) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Transfers of other-than-temporarily impaired held to maturity securities to available for sale securities	$ 12	$ 12	$ 0
Held to Maturity Securities Transferred to Available for Sale Securities During Period, Other Than Temporary Impairment Recognized in Accumulated Other Comprehensive Income	0	0
Held-to-maturity Securities, Transferred Security, Unrealized Gain (Loss)	0	0
HTM Transferred to AFS, Amortized Cost			$ 0
Held to Maturity Securities Transferred to Available for Sale Securities During Period, Fair Value	12	12
Residential Mortgage Backed Securities | Alt-A, other | Subtotal PLRMBS
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Transfers of other-than-temporarily impaired held to maturity securities to available for sale securities	12	12
Held to Maturity Securities Transferred to Available for Sale Securities During Period, Other Than Temporary Impairment Recognized in Accumulated Other Comprehensive Income	0	0
Held-to-maturity Securities, Transferred Security, Unrealized Gain (Loss)	0	0
Held to Maturity Securities Transferred to Available for Sale Securities During Period, Fair Value	$ 12	$ 12

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Other-Than-Temporary Impairment Analysis (OTTI Impaired PLRMBS) (Details) - Subtotal PLRMBS - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	$ 3,894	$ 4,285
Amortized Cost	3,163	3,496
Estimated Fair Value	3,510	3,833
Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	58	64
Amortized Cost	53	59
Estimated Fair Value	58	63
Carrying Value	49	53
Prime | Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	356	405
Amortized Cost	294	335
Estimated Fair Value	323	364
Prime | Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	0	0
Amortized Cost	0	0
Estimated Fair Value	0	0
Carrying Value	0	0
Alt-A, option ARM | Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	859	953
Amortized Cost	639	714
Estimated Fair Value	769	834
Alt-A, option ARM | Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	0	0
Amortized Cost	0	0
Estimated Fair Value	0	0
Carrying Value	0	0
Alt-A, other | Available-for-sale Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	2,679	2,927
Amortized Cost	2,230	2,447
Estimated Fair Value	2,418	2,635
Alt-A, other | Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Unpaid Principal Balance	58	64
Amortized Cost	53	59
Estimated Fair Value	58	63
Carrying Value	$ 49	$ 53

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Advances (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Advances [Line Items]
Advances, Par Value	$ 70,553	$ 77,486	$ 55,187
Advances With Partial Prepayment Symmetry Outstanding	$ 5,109	$ 4,619
Minimum
Advances [Line Items]
Advances, Maturity Period, Fixed Rate	1 day
Advances, Maturity Period, Variable Rate	30 days
Advances, Interest Rate	0.86%	0.79%
Maximum
Advances [Line Items]
Advances, Maturity Period, Fixed Rate	30 years
Advances, Maturity Period, Variable Rate	10 years
Advances, Interest Rate	8.57%	8.57%
Advances, Callable Option
Advances [Line Items]
Advances, Par Value	$ 12,817	$ 18,373
Advances, Putable Option
Advances [Line Items]
Advances, Par Value	$ 10	$ 0

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Advances (Redemption Terms) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Federal Home Loan Bank Advances, Maturities [Abstract]
Within 1 year		$ 41,660	$ 46,403
After 1 year through 2 years		14,131	16,287
After 2 years through 3 years		7,524	5,423
After 3 years through 4 years		4,596	6,719
After 4 years through 5 years		1,550	1,741
After 5 years		1,092	913
Total par value		70,553	77,486	$ 55,187
Valuation adjustments for hedging activities		(161)	(88)
Valuation adjustments under fair value option	[1]	(78)	(16)
Total		$ 70,314	$ 77,382
Federal Home Loan Bank Advances, Weighted Average Interest Rate [Abstract]
Within 1 year		2.03%	1.46%
After 1 year through 2 years		2.19%	1.61%
After 2 years through 3 years		2.30%	1.73%
After 3 years through 4 years		2.42%	1.69%
After 4 years through 5 years		2.48%	2.10%
After 5 years		3.24%	3.13%
Total par value		2.14%	1.57%

[1] At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

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Advances (Earlier of Contractual Maturity or Next Call/Put Date) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Call Date, Rolling Year, Par Value [Abstract]
Within 1 year	$ 45,877	$ 52,624
After 1 year through 2 years	13,256	12,593
After 2 years through 3 years	7,224	7,973
After 3 years through 4 years	1,596	1,719
After 4 years through 5 years	1,544	1,729
After 5 years	1,056	848
Federal Home Loan Bank, Advances, Earlier of Contractual Maturity or Next Put or Convert Date, Rolling Year, Par Value [Abstract]
Within 1 year	41,665	46,403
After 1 year through 2 years	14,136	16,287
After 2 years through 3 years	7,524	5,423
After 3 years through 4 years	4,596	6,719
After 4 years through 5 years	1,550	1,741
After 5 years	1,082	913
Total par value	$ 70,553	$ 77,486	$ 55,187

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Advances (Credit and Concentration Risk) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018		Jun. 30, 2017		Dec. 31, 2017
Advances [Line Items]
Advances Outstanding	$ 70,553	$ 55,187	$ 70,553		$ 55,187		$ 77,486
Interest Income from Advances	$ 361	$ 201	$ 727	[1]	$ 362	[1]
Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	100.00%	100.00%
Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	100.00%	100.00%	100.00%		100.00%
MUFG Union Bank, NA
Advances [Line Items]
Advances Outstanding	$ 13,400	$ 4,600	$ 13,400		$ 4,600
Interest Income from Advances	60	6	104	[1],[2]	8	[1]
First Republic Bank
Advances [Line Items]
Advances Outstanding	10,250	7,700	10,250		7,700
Interest Income from Advances	46	28	81	[1]	48	[1]
JPMorgan Chase Bank, National Association
Advances [Line Items]
Advances Outstanding	9,361	12,805	9,361		12,805
Interest Income from Advances	54	45	104	[1]	86	[2]
Bank of the West
Advances [Line Items]
Advances Outstanding	7,508	9,110	7,508		9,110
Interest Income from Advances	35	19	64	[1],[2]	33	[1]
Wells Fargo National Bank
Advances [Line Items]
Advances Outstanding	4,000		4,000
Interest Income from Advances	21		38	[1],[2]
CIT Bank N.A.
Advances [Line Items]
Advances Outstanding		2,396			2,396
Interest Income from Advances		8			16	[1],[2]
Top five borrowers
Advances [Line Items]
Advances Outstanding	44,519	36,611	44,519		36,611
Interest Income from Advances	$ 216	$ 106	$ 391	[1]	$ 191	[1]
Top five borrowers | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	63.00%	66.00%
Top five borrowers | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	60.00%	53.00%	54.00%		53.00%
Top five borrowers | MUFG Union Bank, NA | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	19.00%	8.00%
Top five borrowers | MUFG Union Bank, NA | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	16.00%	3.00%	14.00%	[2]	2.00%
Top five borrowers | First Republic Bank | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	14.00%	14.00%
Top five borrowers | First Republic Bank | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	13.00%	14.00%	11.00%		14.00%
Top five borrowers | JPMorgan Chase Bank, National Association | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	13.00%	23.00%
Top five borrowers | JPMorgan Chase Bank, National Association | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	15.00%	22.00%	14.00%		24.00%	[2]
Top five borrowers | Bank of the West | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	11.00%	17.00%
Top five borrowers | Bank of the West | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	10.00%	10.00%	9.00%	[2]	9.00%
Top five borrowers | Wells Fargo National Bank | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	6.00%
Top five borrowers | Wells Fargo National Bank | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	6.00%		6.00%	[2]
Top five borrowers | CIT Bank N.A. | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage		4.00%
Top five borrowers | CIT Bank N.A. | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage		4.00%			4.00%	[2]
Other Borrowers
Advances [Line Items]
Advances Outstanding	$ 26,034	$ 18,576	$ 26,034		$ 18,576
Interest Income from Advances	$ 145	$ 95	$ 336	[1]	$ 171	[1]
Other Borrowers | Percentage of Total Advances Outstanding
Advances [Line Items]
Concentration Risk, Percentage	37.00%	34.00%
Other Borrowers | Percentage of Total Interest Income from Advances
Advances [Line Items]
Concentration Risk, Percentage	40.00%	47.00%	46.00%		47.00%

[1] Interest income amounts exclude the interest effect of interest rate exchange agreements with derivative counterparties; as a result, the total interest income amounts will not agree to the Statements of Income. The amount of interest income from advances can vary depending on the amount outstanding, terms to maturity, interest rates, and repricing characteristics.

[2] Nonmember institution.

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Advances (Interest Rate Payment Terms and Prepayment Fees) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Federal Home Loan Bank, Advances, Fixed Rate [Abstract]
Fixed Rate, due within 1 year	$ 23,275	$ 31,767
Fixed Rate, due after 1 year	17,185	13,022
Advances, Total Fixed Rate	40,460	44,789
Federal Home Loan Bank, Advances, Floating Rate [Abstract]
Adjustable Rate, due within 1 year	18,385	14,636
Adjustable Rate, due after 1 year	11,708	18,061
Advances, Total Adjustable Rate	30,093	32,697
Total par value	$ 70,553	$ 77,486	$ 55,187

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Mortgage Loans Held for Portfolio (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 2,638	$ 2,005
Unamortized premiums	95	76
Unamortized discounts	(5)	(5)
Mortgage loans held for portfolio	2,728	2,076
Less: Allowance for credit losses	0	0
Total mortgage loans held for portfolio, net	$ 2,728	2,076
Fixed rate medium-term mortgage loans | Maximum
Mortgage Loans on Real Estate [Line Items]
Mortgage Loans on Real Estate, Original Contractual Terms	15 years
Fixed rate long-term mortgage loans [Member] | Minimum
Mortgage Loans on Real Estate [Line Items]
Mortgage Loans on Real Estate, Original Contractual Terms	15 years
GSEs – single-family: | Fixed rate medium-term mortgage loans
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 20	32
GSEs – single-family: | Fixed rate long-term mortgage loans [Member]
Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	$ 2,618	$ 1,973

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Allowance for Credit Losses (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Period Loan Receivable Becomes Nonaccrual Status	90 days
Loan to Value Ratio Above Which a Borrower is Required to Obtain Primary Mortgage Insurance	80.00%
Allowance for credit losses on mortgage loans	$ 0	$ 0
Conventional Mortgage Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses on mortgage loans	0	0
Nonperforming TDR | Conventional Mortgage Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled Debt Restructuring, Modifications, Recorded Investment	$ 2	$ 3

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Allowance for Credit Losses (Delinquent Mortgage Loans) (Details) - Conventional Mortgage Loan - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	[1]	$ 20	$ 22
Total current loans	[1]	2,723	2,065
Total mortgage loans	[1]	2,743	2,087
In process of foreclosure, included above	[1],[2]	3	3
Nonaccrual loans	[1]	11	12
Loans past due 90 days or more and still accruing interest	[1]	$ 0	$ 0
Serious delinquencies as a percentage of total mortgage loans outstanding	[1],[3]	0.41%	0.59%
30 – 59 days delinquent
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	[1]	$ 7	$ 8
60 – 89 days delinquent
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	[1]	2	2
90 days or more delinquent
Financing Receivable, Allowance for Credit Losses [Line Items]
Total past due	[1]	$ 11	$ 12

[1] The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

[2] Includes loans for which the servicer has reported a decision to foreclose or to pursue a similar alternative, such as deed-in-lieu. Loans in process of foreclosure are included in past due or current loans depending on their delinquency status.

[3] Represents loans that are 90 days or more past due or in the process of foreclosure as a percentage of the recorded investment of total mortgage loans outstanding

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Allowance for Credit Losses (Rollforward) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan and Lease Losses Write-offs, Net	$ 0	$ 0	$ 0	$ 0
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of the period			0
Provision for/(reversal of) credit losses on mortgage loans	0	$ 0	0	$ 0
Balance, end of the period	0		0
Conventional Mortgage Loan
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of the period			0
Balance, end of the period	0		0
Individually evaluated for impairment, Allowance for credit losses	0		0		$ 0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 0		$ 0		$ 0

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Allowance for Credit Losses (By Impairment Methodology) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Allowance for Credit Losses		$ 0	$ 0
Conventional Mortgage Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Allowance for credit losses		0	0
Collectively Evaluated for Impairment, Allowance for credit losses		0	0
Total Allowance for Credit Losses		0	0
Individually evaluated for impairment, Recorded investment		9	9
Collectively evaluated for impairment, Recorded investment		2,734	2,078
Total mortgage loans	[1]	$ 2,743	$ 2,087

[1] The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

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Allowance for Credit Losses (Recorded Investment, Unpaid Principal Balance and Related Allowance of Impaired Loans) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Loans and Leases Receivable, Allowance		$ 0	$ 0
Conventional Mortgage Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, Allowance for credit losses		0	0
Impaired Financing Receivable, Recorded Investment [Abstract]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		9	9
Impaired Financing Receivable, with Related Allowance, Recorded Investment		0	0
Impaired Financing Receivable, Recorded Investment		9	9
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		9	9
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance		0	0
Impaired Financing Receivable, Unpaid Principal Balance		9	9
Impaired Financing Receivable, Related Allowance		0	0
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment		0	0
Loans and Leases Receivable, Allowance		0	0
Financing Receivable, Individually Evaluated for Impairment		9	9
Financing Receivable, Collectively Evaluated for Impairment		2,734	2,078
Financing Receivable, Gross	[1]	$ 2,743	$ 2,087

[1] The recorded investment in a loan is the unpaid principal balance of the loan, adjusted for accrued interest, net deferred loan fees or costs, unamortized premiums or discounts, and direct write-downs. The recorded investment is not net of any valuation allowance.

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Deposits (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Demand Deposits [Line Items]
Interest-bearing Domestic Deposit, Time Deposits	$ 2	$ 0
Interest-bearing Deposit Liabilities, Domestic	356	263
Noninterest-bearing Domestic Deposit, Other	23	18
Deposits	379	281
Adjustable rate
Demand Deposits [Line Items]
Interest-bearing Deposit, Demand and Overnight	354	263
Interest-bearing Deposit Liabilities, Domestic	$ 354	$ 263
Weighted Average Rate, Interest-bearing Domestic Deposits, Point in Time	1.60%	1.10%
Interest-bearing Deposits [Member]
Demand Deposits [Line Items]
Weighted Average Rate, Interest-bearing Domestic Deposits, Point in Time
Interest-bearing Deposits [Member] | Fixed Interest Rate
Demand Deposits [Line Items]
Interest-bearing Deposit Liabilities, Domestic	$ 2	$ 0
Weighted Average Rate, Interest-bearing Domestic Deposits, Point in Time	1.60%	0.00%

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Consolidated Obligations Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Obligation with Joint and Several Liability Arrangement, Amount Outstanding	$ 1,059,859	$ 1,034,260
Federal Home Loan Bank, Consolidated Obligations	$ 98,580	$ 115,503

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Consolidated Obligations (Redemption Terms) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total par value	$ 74,165	$ 85,108
Total	$ 74,061	$ 85,063
Weighted Average Interest Rate [Abstract]
Weighted Average Interest Rate, Maturing In Next Twelve Rolling Months	1.90%	1.33%
Weighted Average Interest Rate, Maturing In Rolling Year Two	1.88%	1.42%
Weighted Average Interest Rate, Maturing In Rolling Year Three	1.82%	1.74%
Weighted Average Interest Rate, Maturing In Rolling Year Four	1.93%	1.78%
Weighted Average Interest Rate, Maturing In Rolling Year Five	2.41%	2.15%
Weighted Average Interest Rate, Maturing After Rolling Year Five	2.94%	2.80%
Consolidated obligation bonds
Debt Instrument [Line Items]
Within 1 year	$ 58,923	$ 69,734
After 1 year through 2 years	6,226	6,461
After 2 years through 3 years	3,791	2,785
After 3 years through 4 years	1,165	2,058
After 4 years through 5 years	2,029	1,994
After 5 years	2,031	2,076
Unamortized premiums	5	9
Unamortized discounts	(11)	(11)
Valuation adjustments for hedging activities	(84)	(37)
Fair value option valuation adjustments	$ (14)	$ (6)
Weighted Average Interest Rate [Abstract]
Total par amount, Weighted Average Interest Rate	1.94%	1.41%

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Consolidated Obligations (Consolidated Obligation Bonds Noncallable and Callable) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total bonds, par value	$ 74,165	$ 85,108
Notional Amount of Derivatives	75,454	99,609
Non-callable
Debt Instrument [Line Items]
Total bonds, par value	63,520	75,496
Callable
Debt Instrument [Line Items]
Total bonds, par value	10,645	9,612
Consolidated obligation bonds | Callable
Debt Instrument [Line Items]
Notional Amount of Derivatives	$ 7,141	$ 6,406

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Consolidated Obligations (Consolidated Obligation Bonds by Earlier of Contractual Maturity or Next Call Date) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total bonds, par value	$ 74,165	$ 85,108
Earlier of Contractual Maturity or Next Call Date [Member]
Debt Instrument [Line Items]
Within 1 year	68,154	78,606
After 1 year through 2 years	5,125	5,326
After 2 years through 3 years	730	935
After 3 years through 4 years	5	85
After 4 years through 5 years	90	55
After 5 years	$ 61	$ 101

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Consolidated Obligations (Consolidated Obligation Discount Notes) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Short-term Debt [Line Items]
Discount notes, par value		$ 24,570	$ 30,494
Total		$ 24,519	$ 30,440
Par amount, Weighted Average Interest Rate	[1]	1.86%	1.24%
Discount notes
Short-term Debt [Line Items]
Unamortized discounts		$ (51)	$ (54)

[1] Represents yield to maturity excluding concession fees.

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Consolidated Obligations (Interest Rate Payment Terms) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Fixed rate	$ 16,348	$ 17,967
Adjustable rate	56,489	66,276
Step-up	953	565
Step-down	275	200
Range bonds	100	100
Total bonds, par value	74,165	85,108
Discount notes, par value	24,570	30,494
Total consolidated obligations, par value	$ 98,735	$ 115,602

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	$ 6,499	$ 6,103	$ 6,499	$ 6,103		$ 6,806		$ 5,537
Net change in pension and postretirement benefits	0	0	1	0
Accumulated Other-than-Temporary Impairment | Available-for-sale Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	347	250	347	250	$ 352	337	$ 167	136
Non-credit-related OTTI loss, Available-for-sale Securities	(9)	(3)	(11)	(3)
Net change in fair value	3	84	20	113
Reclassification from other comprehensive income/(loss) to net income/(loss) [Abstract]
Non-credit-related OTTI to credit-related OTTI, AFS	1	2	1	4
Net current period other comprehensive income/(loss)	(5)	83	10	114
Accumulated Other-than-Temporary Impairment | Held-to-maturity Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	(5)	(7)	(5)	(7)	(5)	(6)	(8)	(9)
Non-credit-related OTTI loss, Held-to-maturity Securities	0	0	0	0
Accretion of Noncredit Related OTTI Loss		1	1	2
Reclassification from other comprehensive income/(loss) to net income/(loss) [Abstract]
Non-credit-related OTTI to credit-related OTTI, HTM	0	0	0	0
Net current period other comprehensive income/(loss)	0	1	1	2
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	(12)	(16)	(12)	(16)	(12)	(13)	(16)	(16)
Net change in pension and postretirement benefits			1
Reclassification from other comprehensive income/(loss) to net income/(loss) [Abstract]
Net current period other comprehensive income/(loss)	0	0	1	0
Accumulated Other Comprehensive Income/(Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity Attributable to Parent	330	227	330	227	$ 335	$ 318	$ 143	$ 111
Net change in pension and postretirement benefits			1
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Parent	(9)	(3)	(11)	(3)
Net change in fair value	3	84	20	113
Accretion of Noncredit Related OTTI Loss		1	1	2
Reclassification from other comprehensive income/(loss) to net income/(loss) [Abstract]
Non-credit-related OTTI to credit-related OTTI, AFS	1	2	1	4
Net current period other comprehensive income/(loss)	$ (5)	$ 84	$ 12	$ 116

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Capital (Capital Requirements) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Risk-Based Capital, Required	$ 2,022	$ 2,023
Risk-Based Capital, Actual	6,424	6,797
Regulatory Capital, Required	4,248	4,935
Regulatory Capital, Actual	$ 6,424	$ 6,797
Regulatory Capital Ratio, Required	4.00%	4.00%
Regulatory Capital Ratio, Actual	6.05%	5.51%
Leverage Capital, Required	$ 5,310	$ 6,169
Leverage Capital, Actual	$ 9,636	$ 10,195
Leverage ratio - Required	5.00%	5.00%
Leverage Ratio, Actual	9.07%	8.26%
Multiplier for Determining Permanent Capital in Leverage Capital Calculation	1.5

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Capital (Mandatorily Redeemable Capital Stock) (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($) Institutions	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Institutions	Jun. 30, 2017 USD ($)	Dec. 31, 2017 Institutions
Capital [Line Items]
Financial Instruments Subject to Mandatory Redemption, Number of Stockholders | Institutions		6		6		7
Interest Expense on Mandatorily Redeemable Capital Stock	[1]	$ 5	$ 7	$ 11	$ 18
Mandatorily Redeemable Capital Stock [Roll Forward]
Balance at the beginning of the period		309	403	309	457
Reclassified from/(to) capital during the period		2	2	2	2
Redemption of mandatorily redeemable capital stock		0	0	0	(54)
Repurchase of excess mandatorily redeemable capital stock		56	1	56	1
Balance at the end of the period		$ 255	$ 404	$ 255	$ 404

[1] The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments

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Capital (By Redemption Period) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount [Abstract]
After 1 year through 2 years		$ 1		$ 0
After 2 years through 3 years		251		306
Past contractual redemption date because of remaining activity	[1]	3		3
Total		$ 255	$ 309	$ 309	$ 404	$ 403	$ 457

[1] Represents mandatorily redeemable capital stock that is past the end of the contractual redemption period because of outstanding activity.

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Capital (Retained Earnings and Dividend Policy) (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended
		Aug. 13, 2018	Apr. 24, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jul. 26, 2018	Jan. 01, 2018	Dec. 31, 2017	Sep. 30, 2017
Capital [Line Items]
Restriction on Dividend Payment, Ratio of Market Value of Capital to Par Value of Capital Less than 70%				70.00%		70.00%
Ratio of Market Value of Capital to Par Value of Capital Stock				224.00%		224.00%
Retained Earnings, Set by the Board inc JCEA					$ 2,000		$ 2,000		$ 2,500		$ 2,300
Excess Capital				$ 152		$ 152				$ 493
Excess Capital to Assets				0.14%		0.14%
Dividends [Abstract]
Dividends, Cash, Annualized Rate						7.00%	8.04%
Total dividends						$ 122	$ 113
Interest Expense on Mandatorily Redeemable Capital Stock	[1]			$ 5	7	11	18
Retained Earnings Activity [Roll Forward]
Balance						6,806	5,537
Balance at beginning of the period						575
Net Income/(Loss)				104	80	185	228
Cash dividends on capital stock						(111)	(95)
Balance at end of the period				612		612
Balance				6,499	6,103	6,499	6,103
Subsequent Events [Abstract]
Amount of Excess Stock and Financial Instruments Subject to Mandatory Redemption, Repurchased During Period			$ 363	700	60	1,128	233
Financial Instruments Subject to Mandatory Redemption, Redeemed				$ 0	0	$ 0	54
Subsequent Event
Subsequent Events [Abstract]
Dividends, Cash Declared, Annualized Rate								7.00%
Interest and Dividends Payable, Current								$ 56
Dividends Payable								51
Interest Payable, Current								$ 5
Dividends Payable, Date to be Paid		Aug. 13, 2018
Minimum
Capital [Line Items]
Regulatory Restrictions on Payment of Capital Stock Dividends, Excess Stock to Assets, Percent				1.00%		1.00%
Limit on Dividend Payment, Ratio of Market Value of Capital to Par Value of Capital				70.00%		70.00%
Subsequent Events [Abstract]
Dividends, Cash Declared, Annualized Rate				5.00%		5.00%
Maximum
Capital [Line Items]
Limit on Dividend Payment, Ratio of Market Value of Capital to Par Value of Capital				100.00%		100.00%
Subsequent Events [Abstract]
Dividends, Cash Declared, Annualized Rate				7.00%		7.00%
Unrestricted Retained Earnings
Retained Earnings Activity [Roll Forward]
Balance				$ 2,681	850	$ 2,670	888
Net Income/(Loss)				84	63	148	79
Cash dividends on capital stock				(58)	(41)	(111)	(95)
Balance				2,707	872	2,707	872
Total Restricted Retained Earnings
Retained Earnings Activity [Roll Forward]
Balance				592	2,300	575	2,168
Net Income/(Loss)				20	17	37	149
Balance				612	2,317	612	2,317
Valuation Adjustments
Retained Earnings Activity [Roll Forward]
Balance				0	20	0	18
Net Income/(Loss)				0	1	0	3
Balance				0	21	0	21
Other
Retained Earnings Activity [Roll Forward]
Balance				0	1,750	0	1,650
Net Income/(Loss)				0	0	0	100
Balance				0	1,750	0	1,750
Joint Capital Enhancement Agreement
Retained Earnings Activity [Roll Forward]
Balance				592	530	575	500
Net Income/(Loss)				20	16	37	46
Balance				612	546	612	546
Total Retained Earnings
Retained Earnings Activity [Roll Forward]
Balance				3,273	3,150	3,245	3,056
Net Income/(Loss)				104	80	185	228
Cash dividends on capital stock				(58)	(41)	(111)	(95)
Balance				$ 3,319	$ 3,189	$ 3,319	$ 3,189

[1] The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments

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Capital (Excess Capital Stock) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	Apr. 24, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jul. 26, 2018	Dec. 31, 2017
Capital [Line Items]
Amount of Excess Stock Repurchased During Period	$ 363	$ 700	$ 60	$ 1,128	$ 233
Financial Instruments Subject to Mandatory Redemption, Redeemed		$ 0	$ 0	$ 0	$ 54
Common stock, par value		$ 100		$ 100
Excess Capital		$ 152		$ 152			$ 493
Excess Capital Stock and Excess Mandatorily Redeemable Capital Stock, Redemption, Period of Written Notice				15 days
Mandatorily Redeemable Capital Stock, Redemption Period				5 years
Maximum
Capital [Line Items]
Dividends, Cash Declared, Annualized Rate		7.00%		7.00%
Minimum
Capital [Line Items]
Dividends, Cash Declared, Annualized Rate		5.00%		5.00%
Subsequent Event
Capital [Line Items]
Dividends, Cash Declared, Annualized Rate						7.00%

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Capital (Concentration) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Concentration Risk [Line Items]
Financial Instruments Subject to Mandatory Redemption, Redemption	$ 0	$ 0	$ 0	$ 54
Capital Stock Outstanding	3,105		3,105		$ 3,552
Total Capital Stock, 10% or more
Concentration Risk [Line Items]
Capital Stock Outstanding	384		$ 384		610
Percentage of Total Capital Stock Outstanding			100.00%	100.00%
Other Borrowers
Concentration Risk [Line Items]
Capital Stock Outstanding	2,721		$ 2,721		2,942
Percentage of Total Capital Stock Outstanding			87.00%	83.00%
Certain Members And Certain Nonmembers [Member]
Concentration Risk [Line Items]
Percentage of Total Capital Stock Outstanding			13.00%	17.00%
MUFG Union Bank, NA
Concentration Risk [Line Items]
Capital Stock Outstanding	367		$ 367		205
MUFG Union Bank, NA | Total Capital Stock, 10% or more
Concentration Risk [Line Items]
Percentage of Total Capital Stock Outstanding			12.00%	6.00%
Charles Schwab Bank [Member]
Concentration Risk [Line Items]
Capital Stock Outstanding	$ 17		$ 17		$ 405
Charles Schwab Bank [Member] | Total Capital Stock, 10% or more
Concentration Risk [Line Items]
Percentage of Total Capital Stock Outstanding			1.00%	11.00%

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Segment Information (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment				2
Adjusted Net Interest Income		$ 152	$ 138	$ 305	$ 269
Amortization of Basis Adjustments	[1]	0	0	(1)	(2)
Income/(Expense) on Economic Hedges	[2]	(7)	(13)	(7)	(25)
Interest Expense on Mandatorily Redeemable Capital Stock	[3]	5	7	11	18
Net Interest Income After Mortgage Loan Loss Provision		154	144	302	278
Other Income/ (Loss)		5	(16)	(3)	96
Other Expense		43	39	92	119
Income Before AHP Assessment		116	89	207	255
OTTI PLRMBS, Total accretion or amortization recognized in interest income		20	23	42	46
Net OTTI loss, credit-related		(5)	(6)	(6)	(9)
Assets		106,208		106,208		$ 123,385
Advances- Related Business
Segment Reporting Information [Line Items]
Adjusted Net Interest Income		79	57	157	105
Assets		86,849		86,849		103,426
Mortgage- Related Business
Segment Reporting Information [Line Items]
Adjusted Net Interest Income	[4]	73	$ 81	148	$ 164
Assets		$ 19,359		$ 19,359		$ 19,959

[1] Represents amortization of amounts deferred for adjusted net interest income purposes only

[2] The Bank includes income and expense associated with net settlements from economic hedges in adjusted net interest income in its analysis of financial performance for its two operating segments. For financial reporting purposes, the Bank does not include these amounts in net interest income in the Statements of Income, but instead records them in other income in “Net gain/(loss) on derivatives and hedging activities.”

[3] The Bank excludes interest expense on mandatorily redeemable capital stock from adjusted net interest income in its analysis of financial performance for its two operating segments

[4] The mortgage-related business includes total accretion or amortization associated with other-than-temporarily impaired PLRMBS, which are recognized in interest income, totaled $20 and $23 for the three months ended June 30, 2018 and 2017; and totaled $42 and $46 for the six months ended June 30, 2018 and 2017, respectively. The mortgage-related business does not include credit-related OTTI losses of $5 and $6 for the three months ended June 30, 2018 and 2017, and $6 and $9 for the six months ended June 30, 2018 and 2017, respectively.

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Derivatives and Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional Amount of Derivatives	$ 75,454	$ 99,609
Derivative, Net Liability Position, Aggregate Fair Value	58
Collateral Already Posted, Aggregate Fair Value	$ 56
Maximum
Derivative [Line Items]
Advances, Maturity Term	30 years

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Derivatives and Hedging Activities (Derivatives in Statement of Condition) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		$ 75,454	$ 99,609
Derivative Assets		93	174
Netting adjustments and cash collateral	[1]	48	(91)
Total Derivative Assets and Derivative Liabilities		141	83
Derivative Liabilities		117	85
Netting adjustments and cash collateral	[1]	115	84
Derivative Assets and Derivative Liabilities		2	1
Cash collateral posted and related accrued interest		195	10
Cash collateral received and related accrued interest		32	18
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		34,853	24,270
Derivative Assets		8	92
Derivative Liabilities		43	27
Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		34,853	24,270
Derivative Assets		8	92
Derivative Liabilities		43	27
Not Designated as Hedging Instrument, Economic Hedge | Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		39,022	73,760
Derivative Assets		83	81
Derivative Liabilities		74	57
Not Designated as Hedging Instrument, Economic Hedge | Interest rate caps and floors
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		1,563	1,563
Derivative Assets		2	1
Derivative Liabilities		0	1
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		40,601	75,339
Derivative Assets		85	82
Derivative Liabilities		74	58
Mortgages | Not Designated as Hedging Instrument | Mortgage delivery commitments
Derivatives, Fair Value [Line Items]
Notional Amount of Derivatives		16	16
Derivative Assets		0	0
Derivative Liabilities		$ 0	$ 0

[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

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Derivatives and Hedging Activities (Derivatives in Statement of Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain (loss) related to fair value hedge ineffectiveness	$ 2	$ (2)	$ 4	$ (2)
Total net gain/(loss) related to derivatives not designated as hedging instruments	15	(17)	45	(26)
Derivative Instruments, Other Gain (Loss)	0	0	(1)	0
Net gain/(loss) on derivatives and hedging activities	17	(19)	48	(28)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain (loss) related to fair value hedge ineffectiveness	2	(2)	4	(2)
Total net gain/(loss) related to derivatives not designated as hedging instruments	18	(10)	42	(8)
Interest rate caps and floors
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain/(loss) related to derivatives not designated as hedging instruments	(1)	(3)	1	(5)
Net settlements
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain/(loss) related to derivatives not designated as hedging instruments	(7)	(13)	(7)	(25)
Mortgages | Mortgage delivery commitments
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain/(loss) related to derivatives not designated as hedging instruments	$ 5	$ 9	$ 9	$ 12

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Derivatives and Hedging Activities (Derivatives in Statement of Income and Impact on Interest) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	$ 4	$ (9)	$ 30	$ (6)
Gain /(Loss) on Hedged Item	(2)	7	(26)	4
Net Fair Value Hedge Ineffectiveness	2	(2)	4	(2)
Effect of Derivatives on Net Interest Income	9	(2)	13	(2)
Percentage of Total Advances Outstanding
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	10	(10)	80	4
Gain /(Loss) on Hedged Item	(6)	8	(73)	(6)
Net Fair Value Hedge Ineffectiveness	4	(2)	7	(2)
Effect of Derivatives on Net Interest Income	17	(8)	20	(17)
Consolidated obligation bonds
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Derivatives	(6)	1	(50)	(10)
Gain /(Loss) on Hedged Item	4	(1)	47	10
Net Fair Value Hedge Ineffectiveness	(2)	0	(3)	0
Effect of Derivatives on Net Interest Income	$ (8)	$ 6	$ (7)	$ 15

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Derivatives and Hedging Activities (Offsetting of Derivative Assets and Derivative Liabilities) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Total Derivative Assets and Derivative Liabilities		$ 141	$ 83
Netting Adjustments and Cash Collateral-Derivative Liability	[1]	(115)	(84)
Derivative Assets and Derivative Liabilities		2	1
Uncleared derivatives
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Recognized Amount		89	35
Derivative Asset Fair Value Gross Liability and Right To Reclaim Cash Offset		(87)	(33)
Total Derivative Assets and Derivative Liabilities		2	2
Derivative Liability, Fair Value, Gross Recognized Amount		113	29
Netting Adjustments and Cash Collateral-Derivative Liability		(111)	(28)
Derivative Assets and Derivative Liabilities		2	1
Cleared derivatives
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Recognized Amount		4	139
Derivative Asset Fair Value Gross Liability and Right To Reclaim Cash Offset		135	(58)
Total Derivative Assets and Derivative Liabilities		139	81
Derivative Liability, Fair Value, Gross Recognized Amount		4	56
Netting Adjustments and Cash Collateral-Derivative Liability		(4)	(56)
Derivative Assets and Derivative Liabilities		$ 0	$ 0

[1] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

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Fair Value (Carrying Value and Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions		Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks		$ 44		$ 31
Trading securities	[1]	662		1,164
Available-for-sale (AFS) securities	[1]	3,510		3,833
HTM securities, Carrying Value	[1],[2]	13,769		14,680
HTM Securities, Fair Value		13,739		14,704
Accrued interest receivable		161		119
Derivative assets, net		141		83
Derivative Assets		93		174
Derivative Asset, Netting adjustments	[3]	48		(91)
Liabilities
Mandatorily redeemable capital stock		255	$ 309	309		$ 404	$ 403	$ 457
Accrued interest payable		131		116
Derivative liabilities, net		2		1
Derivative Liabilities		117		85
Derivative Liability, Netting adjustments	[3]	(115)		(84)
Carrying Value
Assets
Cash and due from banks		44		31
Interest-bearing deposits		2,035		1,115
Securities purchased under agreements to resell		4,000		11,750
Federal funds sold		8,727		11,028
Trading securities		662		1,164
Available-for-sale (AFS) securities		3,510		3,833
HTM securities, Carrying Value		13,769		14,680
Advances		70,314		77,382
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans		2,728		2,076
Accrued interest receivable		161		119
Derivative assets, net	[4]	141		83
Other assets	[5]	9		9
Liabilities
Deposits		379		281
Total consolidated obligations		98,580		115,503
Mandatorily redeemable capital stock		255		309
Accrued interest payable		131		116
Derivative liabilities, net	[4]	2		1
Estimated Fair Value
Assets
Cash and due from banks		44		31
Interest-bearing deposits		2,035		1,115
Securities purchased under agreements to resell		4,000		11,750
Federal funds sold		8,729		11,029
Trading securities		662		1,164
Available-for-sale (AFS) securities		3,510		3,833
HTM Securities, Fair Value		13,739		14,704
Advances		70,363		77,437
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans		2,660		2,075
Accrued interest receivable		161		119
Derivative assets, net	[4]	141		83
Other assets	[5]	9		9
Liabilities
Deposits		379		281
Total consolidated obligations		98,357		115,375
Mandatorily redeemable capital stock		255		309
Accrued interest payable		131		116
Derivative liabilities, net	[4]	2		1
Level 1
Assets
Cash and due from banks		44		31
Interest-bearing deposits		2,035		1,115
Securities purchased under agreements to resell		0		0
Federal funds sold		0		0
Trading securities		0		0
Available-for-sale (AFS) securities		0		0
HTM Securities, Fair Value		0		0
Advances		0		0
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans		0		0
Accrued interest receivable		0		0
Derivative Assets		0		0	[4]
Other assets	[5]	9		9
Liabilities
Deposits		0		0
Total consolidated obligations		0		0
Mandatorily redeemable capital stock		255		309
Accrued interest payable		0		0
Derivative Liabilities		0		0	[4]
Level 2
Assets
Cash and due from banks		0		0
Interest-bearing deposits		0		0
Securities purchased under agreements to resell		4,000		11,750
Federal funds sold		8,729		11,029
Trading securities		662		1,164
Available-for-sale (AFS) securities		0		0
HTM Securities, Fair Value		12,904		13,697
Advances		70,363		77,437
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans		2,660		2,075
Accrued interest receivable		161		119
Derivative Assets	[4]	93		174
Derivative Asset, Netting adjustments	[4]	48		(91)
Other assets	[5]	0		0
Liabilities
Deposits		379		281
Total consolidated obligations		98,357		115,375
Mandatorily redeemable capital stock		0		0
Accrued interest payable		131		116
Derivative Liabilities	[4]	117		85
Derivative Liability, Netting adjustments	[4]	(115)		(84)
Level 3
Assets
Cash and due from banks		0		0
Interest-bearing deposits		0		0
Securities purchased under agreements to resell		0		0
Federal funds sold		0		0
Trading securities		0		0
Available-for-sale (AFS) securities		3,510		3,833
HTM Securities, Fair Value		835		1,007
Advances		0		0
Mortgage loans held for portfolio, net of allowance for credit losses on mortgage loans		0		0
Accrued interest receivable		0		0
Derivative Assets		0		0	[4]
Other assets	[5]	0		0
Liabilities
Deposits		0		0
Total consolidated obligations		0		0
Mandatorily redeemable capital stock		0		0
Accrued interest payable		0		0
Derivative Liabilities		0		0	[4]
Standby letters of credit | Carrying Value
Other
Other commitments		22		19
Standby letters of credit | Estimated Fair Value
Other
Other commitments		22		19
Standby letters of credit | Level 1
Other
Other commitments		0		0
Standby letters of credit | Level 2
Other
Other commitments		22		19
Standby letters of credit | Level 3
Other
Other commitments		0		0
Discount notes | Carrying Value
Liabilities
Discount notes		24,519		30,440
Discount notes | Estimated Fair Value
Liabilities
Discount notes		24,518		30,437
Discount notes | Level 1
Liabilities
Discount notes		0		0
Discount notes | Level 2
Liabilities
Discount notes		24,518		30,437
Discount notes | Level 3
Liabilities
Discount notes		0		0
Bonds
Liabilities
Bonds		1,404		949
Bonds | Carrying Value
Liabilities
Bonds		74,061		85,063
Bonds | Estimated Fair Value
Liabilities
Bonds		73,839		84,938
Bonds | Level 1
Liabilities
Bonds		0		0
Bonds | Level 2
Liabilities
Bonds		73,839		84,938
Bonds | Level 3
Liabilities
Bonds		$ 0		$ 0

[1] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

[2] Amortized cost includes unpaid principal balance, unamortized premiums and discounts, and previous OTTI recognized in earnings. The carrying value of HTM securities represents amortized cost after adjustment for non-credit-related OTTI recognized in AOCI.

[3] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

[4] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty.

[5] Represents publicly traded mutual funds held in a grantor trust.

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Fair Value (Fair Value Measured on Recurring and Nonrecurring Basis) (Details) - USD ($) $ in Millions		Jun. 30, 2018		Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	[1]	$ 662		$ 1,164
Available-for-sale (AFS) securities	[1]	3,510		3,833
Advances		6,083	[2]	6,431
Derivative Asset, Netting adjustments	[3]	48		(91)
Derivative assets, net		141		83
Derivative Liability, Netting adjustments	[3]	(115)		(84)
Derivative liabilities, net		2		1
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Available-for-sale (AFS) securities		0		0
Other assets	[4]	9		9
Mortgage loans held for portfolio		0		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		662		1,164
Available-for-sale (AFS) securities		0		0
Derivative Asset, Netting adjustments	[5]	48		(91)
Other assets	[4]	0		0
Derivative Liability, Netting adjustments	[5]	(115)		(84)
Mortgage loans held for portfolio		2,660		2,075
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Available-for-sale (AFS) securities		3,510		3,833
Other assets	[4]	0		0
Mortgage loans held for portfolio		0		0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Advances	[6]	6,083		6,431
Derivative Asset, Netting adjustments	[7]	48		(91)
Derivative Liability, Netting adjustments	[7]	(115)		(84)
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Available-for-sale (AFS) securities		0		0
Advances	[6]	0		0
Other assets		9		9
Total fair value measurements – Assets		9		9
Total recurring fair value measurements – Liabilities		0		0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		662		1,164
Available-for-sale (AFS) securities		0		0
Advances	[6]	6,083		6,431
Other assets		0		0
Total fair value measurements – Assets		6,838		7,769
Total recurring fair value measurements – Liabilities		1,521		1,034
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Available-for-sale (AFS) securities		3,510		3,833
Advances	[6]	0		0
Other assets		0		0
Total fair value measurements – Assets		3,510		3,833
Total recurring fair value measurements – Liabilities		0		0
Fair Value, Measurements, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurements – Assets	[8]	0		0
Mortgage loans held for portfolio		0		0	[8]
Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurements – Assets	[8]	0		0
Mortgage loans held for portfolio		0		0	[8]
Fair Value, Measurements, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurements – Assets	[8]	2		3
Mortgage loans held for portfolio	[8]	2		3
GSEs – FFCB bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		657		1,158
GSEs – FFCB bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
GSEs – FFCB bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		657		1,158
GSEs – FFCB bonds | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Other U.S. obligations – Ginnie Mae | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Other U.S. obligations – Ginnie Mae | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		5		6
Other U.S. obligations – Ginnie Mae | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		0		0
Consolidated obligation bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds		1,404		949
Consolidated obligation bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds		0		0
Consolidated obligation bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds		73,839		84,938
Consolidated obligation bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds		0		0
Consolidated obligation bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	[9]	1,404		949
Consolidated obligation bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	[9]	0		0
Consolidated obligation bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	[9]	1,404		949
Consolidated obligation bonds | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds	[9]	0		0
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		662		1,164
Available-for-sale (AFS) securities		3,510		3,833
Derivative assets, net	[5]	141		83
Other assets	[4]	9		9
Derivative liabilities, net	[5]	2		1
Mortgage loans held for portfolio		2,660		2,075
Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		662		1,164
Available-for-sale (AFS) securities		3,510		3,833
Other assets		9		9
Total fair value measurements – Assets		10,405		11,520
Total recurring fair value measurements – Liabilities		1,406		950
Estimate of Fair Value Measurement | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total fair value measurements – Assets	[8]	2		3
Mortgage loans held for portfolio	[8]	2		3
Estimate of Fair Value Measurement | GSEs – FFCB bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		657		1,158
Estimate of Fair Value Measurement | Other U.S. obligations – Ginnie Mae | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities		5		6
Estimate of Fair Value Measurement | Consolidated obligation bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Bonds		73,839		84,938
Residential Mortgage Backed Securities | Subtotal PLRMBS | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale (AFS) securities		0		0
Residential Mortgage Backed Securities | Subtotal PLRMBS | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale (AFS) securities		0		0
Residential Mortgage Backed Securities | Subtotal PLRMBS | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale (AFS) securities		3,510		3,833
Residential Mortgage Backed Securities | Estimate of Fair Value Measurement | Subtotal PLRMBS | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale (AFS) securities		3,510		3,833
Interest rate swaps | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Netting adjustments	[7]	48		(91)
Derivative Liability, Netting adjustments	[7]	(115)		(84)
Interest rate swaps | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, net		0		0
Derivative liabilities, net		0		0
Interest rate swaps | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, net		93		174
Derivative liabilities, net		117		85
Interest rate swaps | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, net		0		0
Derivative liabilities, net		0		0
Interest rate swaps | Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, net		141		83
Derivative liabilities, net		$ 2		$ 1

[1] At June 30, 2018, and December 31, 2017, none of these securities were pledged as collateral that may be repledged.

[2] At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

[3] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted and related accrued interest was $195 and $10 at June 30, 2018, and December 31, 2017, respectively. Cash collateral received and related accrued interest was $32 and $18 at June 30, 2018, and December 31, 2017, respectively.

[4] Represents publicly traded mutual funds held in a grantor trust.

[5] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty.

[6] Represents advances recorded under the fair value option at June 30, 2018, and December 31, 2017.

[7] Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed by the Bank, with the same clearing agents and/or counterparty

[8] The fair value information presented is as of the date the fair value adjustment was recorded during the six months ended June 30, 2018

[9] Represents consolidated obligation bonds recorded under the fair value option at June 30, 2018, and December 31, 2017

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Fair Value (Level 3) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net OTTI loss, credit-related	[1]	$ (5)	$ (6)	$ (6)	$ (9)
Net amount of OTTI loss reclassified to/(from) other income/(loss)		(8)	(1)	(10)	1
Residential Mortgage Backed Securities | Subtotal PLRMBS | Fair Value, Measurements, Recurring | Level 3 | Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of the period		3,686	4,294	3,833	4,489
Interest income		20	24	42	46
Net OTTI loss, credit-related		(5)	(6)	(6)	(9)
Unrealized gain/(loss) of other-than-temporarily impaired securities included in AOCI		3	84	20	113
Net amount of OTTI loss reclassified to/(from) other income/(loss)		(8)	(1)	(10)	1
Settlements		(198)	(231)	(381)	(476)
Transfers of HTM securities to AFS securities		12	0	12	0
Balance, end of the period		3,510	4,164	3,510	4,164
Total amount of gain/(loss) for the period included in earnings attributable to the change in unrealized gains/losses relating to assets and liabilities still held at the end of the period		$ 15	$ 16	$ 36	$ 36

[1] For the six months ended June 30, 2018 and 2017, “securities for which OTTI was previously recognized” represents all securities that were also other-than-temporarily impaired prior to January 1, 2018 and 2017, respectively.

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Fair Value (Fair Value Option) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Balance, beginning of the period				$ 6,431
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option		$ (12)	$ 5	(53)	$ 4
Balance, end of the period	[1]	6,083		6,083
Percentage of Total Advances Outstanding
Fair Value, Option, Quantitative Disclosures [Line Items]
Balance, beginning of the period		6,637	3,816	6,431	3,719
New transactions elected for fair value option		342	1,772	1,564	2,060
Maturities and terminations		(882)	(107)	(1,850)	(299)
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option		(14)	8	(63)	9
Change in accrued interest		0	1	1	1
Balance, end of the period		6,083	5,490	6,083	5,490
Consolidated obligation bonds
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gain/(loss) on advances and net (gain)/loss on consolidated obligation bonds held under fair value option		(2)	3	(10)	5
Balance, beginning of the period		1,315	2,236	949	1,507
New transactions elected for fair value option		89	95	463	835
Maturities and terminations		0	(1,215)	0	(1,230)
Change in accrued interest		2	(1)	2	1
Balance, end of the period		$ 1,404	$ 1,118	$ 1,404	$ 1,118

[1] At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

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Fair Value (Fair Value Difference Between Fair Value and Remaining Contractual Principal Balance Outstanding) (Details) - USD ($) $ in Millions		Jun. 30, 2018		Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Option, Principal Balance, Advances		$ 6,161	[1]		$ 6,447
Fair Value of Advances Under the Fair Value Option		6,083	[1]		6,431
Fair Value Over/(Under) Principal Balance, Advances	[1]	(78)			(16)
Consolidated obligation bonds
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Option, Principal Balance, CO Bonds		1,418			955
Fair Value of Bonds Under the Fair Value Option		1,404			949
Fair Value Over/(Under) Principal Balance, CO Bonds		(14)			(6)
Percentage of Total Advances Outstanding
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Advances Under the Fair Value Option		6,083		$ 6,637	6,431	$ 5,490	$ 3,816	$ 3,719
Consolidated obligation bonds
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value of Bonds Under the Fair Value Option		$ 1,404		$ 1,315	$ 949	$ 1,118	$ 2,236	$ 1,507

[1] At June 30, 2018, and December 31, 2017, none of these advances were 90 days or more past due or had been placed on nonaccrual status.

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Commitments and Contingencies Off-Balance Sheet Commitments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Obligation with Joint and Several Liability Arrangement, Amount Outstanding	$ 1,059,859	$ 1,034,260
Standby Letters Of Credit, Final Expiration	2033
Other Liabilities	$ 164	165
Commitments to purchase mortgage loans, maximum term	60 days
Total consolidated obligations, par value	$ 98,735	115,602
Standby letters of credit outstanding
Loss Contingencies [Line Items]
Expire Within One Year	12,737	12,910
Expire After One Year	4,083	3,240
Total	16,820	16,150
Other Liabilities	22	19
Commitments to fund additional advances
Loss Contingencies [Line Items]
Expire Within One Year	0	1
Expire After One Year	0	0
Total	0	1
Commitments to issue consolidated obligation discount notes, par
Loss Contingencies [Line Items]
Expire Within One Year	57	134
Expire After One Year	0	0
Total	57	134
Commitments to issue consolidated obligation bonds, par
Loss Contingencies [Line Items]
Expire Within One Year	0	595
Expire After One Year	0	0
Total	$ 0	595
Minimum | Standby letters of credit outstanding
Loss Contingencies [Line Items]
Guarantor Obligations, Term	14 days
Maximum | Standby letters of credit outstanding
Loss Contingencies [Line Items]
Guarantor Obligations, Term	15 years
Guarantee of Indebtedness of Others
Loss Contingencies [Line Items]
Total consolidated obligations, par value	$ 98,735	115,602
Mortgages | Commitments to purchase mortgage loans
Loss Contingencies [Line Items]
Expire Within One Year	16	16
Expire After One Year	0	0
Total	$ 16	$ 16

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Transactions with Certain Members, Certain Nonmembers, and Other FHLBanks (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Proceeds from Other FHLBank Borrowings			$ 1,510	$ 15
Assets:
Advances	$ 70,314		70,314		$ 77,382
Mortgage loans held for portfolio	2,728		2,728		2,076
Accrued interest receivable	161		161		119
Liabilities:
Deposits	379		379		281
Capital [Abstract]
Capital Stock	2,850		2,850		3,243
Interest Income:
Advances	379	$ 193	748	346
Mortgage loans held for portfolio	23	11	44	20
MPF Service Fee Expense to FHLB Chicago	0		1	1
FHLBanks [Member]
Related Party Transaction [Line Items]
Deposits with other FHLB	0		0		0
Payments to Extend Overnight Loans to Other FHLBanks			(280)	(1,005)
Proceeds from Collection of Loans to Other FHLBanks			0	0
Transaction with Member Officer or Director
Assets:
Advances	3,811		3,811		3,072
Mortgage loans held for portfolio	12		12		13
Accrued interest receivable	7		7		5
Liabilities:
Deposits	26		26		3
Capital [Abstract]
Capital Stock	142		142		$ 126
Interest Income:
Advances	$ 17	$ 10	$ 31	$ 19