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Investment Securities
9 Months Ended
Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]  
Investment Securities
Note 4:  Investment Securities

Table 4.1 provides the amortized cost and fair value by major categories of available-for-sale securities, which are carried at fair value, and held-to-maturity debt securities, which are carried at amortized cost. The net unrealized gains (losses) for available-for-sale securities are reported on an after-tax basis as a component of cumulative OCI.
Table 4.1: Amortized Cost and Fair Value
(in millions)
Amortized Cost

 
Gross
unrealized
gains

 
Gross
unrealized
losses

 
Fair
value

September 30, 2016
 
 
 
 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
25,968

 
410

 
(2
)
 
26,376

Securities of U.S. states and political subdivisions
56,000

 
910

 
(1,544
)
 
55,366

Mortgage-backed securities:
 
 
 
 
 
 
 
Federal agencies
132,732

 
3,020

 
(60
)
 
135,692

Residential
7,881

 
653

 
(7
)
 
8,527

Commercial
9,801

 
126

 
(67
)
 
9,860

Total mortgage-backed securities
150,414

 
3,799

 
(134
)
 
154,079

Corporate debt securities
12,506

 
389

 
(174
)
 
12,721

Collateralized loan and other debt obligations (1) 
35,201

 
292

 
(48
)
 
35,445

Other (2)
6,278

 
128

 
(35
)
 
6,371

Total debt securities
286,367

 
5,928

 
(1,937
)
 
290,358

Marketable equity securities:
 
 
 
 
 
 
 
Perpetual preferred securities
529

 
65

 
(3
)
 
591

Other marketable equity securities
222

 
420

 

 
642

Total marketable equity securities
751

 
485

 
(3
)
 
1,233

Total available-for-sale securities
287,118

 
6,413

 
(1,940
)
 
291,591

Held-to-maturity securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
44,682

 
2,209

 

 
46,891

Securities of U.S. states and political subdivisions
2,994

 
121

 
(8
)
 
3,107

    Federal agency and other mortgage-backed securities (3)
47,721

 
969

 

 
48,690

Collateralized loan obligations
1,406

 
7

 
(2
)
 
1,411

Other (2)
2,438

 
11

 
(1
)
 
2,448

Total held-to-maturity securities
99,241

 
3,317

 
(11
)
 
102,547

Total
$
386,359

 
9,730

 
(1,951
)
 
394,138

December 31, 2015
 
 
 
 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
36,374

 
24

 
(148
)
 
36,250

Securities of U.S. states and political subdivisions
49,167

 
1,325

 
(502
)
 
49,990

Mortgage-backed securities:
 
 
 
 
 
 
 
Federal agencies
103,391

 
1,983

 
(828
)
 
104,546

Residential
7,843

 
740

 
(25
)
 
8,558

Commercial
13,943

 
230

 
(85
)
 
14,088

Total mortgage-backed securities
125,177

 
2,953

 
(938
)
 
127,192

Corporate debt securities
15,548

 
312

 
(449
)
 
15,411

Collateralized loan and other debt obligations (1)
31,210

 
125

 
(368
)
 
30,967

Other (2)
5,842

 
115

 
(46
)
 
5,911

Total debt securities
263,318

 
4,854

 
(2,451
)
 
265,721

Marketable equity securities:
 
 
 
 
 
 
 
Perpetual preferred securities
819

 
112

 
(13
)
 
918

Other marketable equity securities
239

 
482

 
(2
)
 
719

Total marketable equity securities
1,058

 
594

 
(15
)
 
1,637

Total available-for-sale securities
264,376

 
5,448

 
(2,466
)
 
267,358

Held-to-maturity securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
44,660

 
580

 
(73
)
 
45,167

Securities of U.S. states and political subdivisions
2,185

 
65

 

 
2,250

Federal agency and other mortgage-backed securities (3)
28,604

 
131

 
(314
)
 
28,421

Collateralized loan obligations
1,405

 

 
(24
)
 
1,381

Other (2)
3,343

 
8

 
(3
)
 
3,348

Total held-to-maturity securities
80,197

 
784

 
(414
)
 
80,567

Total
$
344,573

 
6,232

 
(2,880
)
 
347,925

(1)
The available-for-sale portfolio includes collateralized debt obligations (CDOs) with a cost basis and fair value of $824 million and $832 million, respectively, at September 30, 2016, and $247 million and $257 million, respectively, at December 31, 2015.
(2)
The “Other” category of available-for-sale securities largely includes asset-backed securities collateralized by credit cards, student loans, home equity loans and automobile leases or loans and cash. Included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by automobile leases or loans and cash with a cost basis and fair value of $1.4 billion each at September 30, 2016, and $1.9 billion each at December 31, 2015. Also included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by dealer floorplan loans with a cost basis and fair value of $1.1 billion each at September 30, 2016, and $1.4 billion each at December 31, 2015.
(3)
Predominantly consists of federal agency mortgage-backed securities at September 30, 2016. The entire balance consists of federal agency mortgage-backed securities at December 31, 2015.
Gross Unrealized Losses and Fair Value
Table 4.2 shows the gross unrealized losses and fair value of securities in the investment securities portfolio by length of time that individual securities in each category have been in a continuous loss position. Debt securities on which we have taken credit-related OTTI write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down.
Table 4.2: Gross Unrealized Losses and Fair Value
 
Less than 12 months
 
 
12 months or more
 
 
Total
 
(in millions)
Gross
unrealized
losses

 
Fair
value

 
Gross
unrealized
losses

 
Fair
value

 
Gross
unrealized
losses

 
Fair
value

September 30, 2016
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
(2
)
 
2,033

 

 

 
(2
)
 
2,033

Securities of U.S. states and political subdivisions
(455
)
 
21,306

 
(1,089
)
 
12,596

 
(1,544
)
 
33,902

Mortgage-backed securities:
 
 
 
 
 
 
 
 
 
 

Federal agencies
(7
)
 
4,785

 
(53
)
 
3,697

 
(60
)
 
8,482

Residential
(3
)
 
379

 
(4
)
 
210

 
(7
)
 
589

Commercial
(23
)
 
1,255

 
(44
)
 
2,415

 
(67
)
 
3,670

Total mortgage-backed securities
(33
)
 
6,419

 
(101
)
 
6,322

 
(134
)
 
12,741

Corporate debt securities
(11
)
 
758

 
(163
)
 
1,683

 
(174
)
 
2,441

Collateralized loan and other debt obligations
(6
)
 
754

 
(42
)
 
5,256

 
(48
)
 
6,010

Other
(7
)
 
1,107

 
(28
)
 
1,304

 
(35
)
 
2,411

Total debt securities
(514
)
 
32,377

 
(1,423
)
 
27,161

 
(1,937
)
 
59,538

Marketable equity securities:
 
 
 
 
 
 
 
 

 

Perpetual preferred securities
(1
)
 
5

 
(2
)
 
51

 
(3
)
 
56

Other marketable equity securities

 

 

 

 

 

Total marketable equity securities
(1
)
 
5

 
(2
)
 
51

 
(3
)
 
56

Total available-for-sale securities
(515
)
 
32,382

 
(1,425
)
 
27,212

 
(1,940
)
 
59,594

Held-to-maturity securities:
 
 
 
 
 
 
 
 

 

Securities of U.S. Treasury and federal agencies

 

 

 

 

 

Securities of U.S. states and political subdivisions
(5
)
 
547

 
(3
)
 
252

 
(8
)
 
799

Federal agency and other mortgage-backed
   securities

 

 

 

 

 

Collateralized loan obligations

 

 
(2
)
 
285

 
(2
)
 
285

Other
(1
)
 
739

 

 

 
(1
)
 
739

Total held-to-maturity securities
(6
)
 
1,286

 
(5
)
 
537

 
(11
)
 
1,823

Total
$
(521
)
 
33,668

 
(1,430
)
 
27,749

 
(1,951
)
 
61,417

December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
(148
)
 
24,795

 

 

 
(148
)
 
24,795

Securities of U.S. states and political subdivisions
(26
)
 
3,453

 
(476
)
 
12,377

 
(502
)
 
15,830

Mortgage-backed securities:
 
 
 
 
 
 
 
 
 
 
 
Federal agencies
(522
)
 
36,329

 
(306
)
 
9,888

 
(828
)
 
46,217

Residential
(20
)
 
1,276

 
(5
)
 
285

 
(25
)
 
1,561

Commercial
(32
)
 
4,476

 
(53
)
 
2,363

 
(85
)
 
6,839

Total mortgage-backed securities
(574
)
 
42,081

 
(364
)
 
12,536

 
(938
)
 
54,617

Corporate debt securities
(244
)
 
4,941

 
(205
)
 
1,057

 
(449
)
 
5,998

Collateralized loan and other debt obligations
(276
)
 
22,214

 
(92
)
 
4,844

 
(368
)
 
27,058

Other
(33
)
 
2,768

 
(13
)
 
425

 
(46
)
 
3,193

Total debt securities
(1,301
)
 
100,252

 
(1,150
)
 
31,239

 
(2,451
)
 
131,491

Marketable equity securities:
 
 
 
 
 
 
 
 
 
 
 
Perpetual preferred securities
(1
)
 
24

 
(12
)
 
109

 
(13
)
 
133

Other marketable equity securities
(2
)
 
40

 

 

 
(2
)
 
40

Total marketable equity securities
(3
)
 
64

 
(12
)
 
109

 
(15
)
 
173

Total available-for-sale securities
(1,304
)
 
100,316

 
(1,162
)
 
31,348

 
(2,466
)
 
131,664

Held-to-maturity securities:
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
(73
)
 
5,264

 

 

 
(73
)
 
5,264

Securities of U.S. states and political subdivisions

 

 

 

 

 

Federal agency and other mortgage-backed securities
(314
)
 
23,115

 

 

 
(314
)
 
23,115

Collateralized loan obligations
(20
)
 
1,148

 
(4
)
 
233

 
(24
)
 
1,381

Other
(3
)
 
1,096

 

 

 
(3
)
 
1,096

Total held-to-maturity securities
(410
)
 
30,623

 
(4
)
 
233

 
(414
)
 
30,856

Total
$
(1,714
)
 
130,939

 
(1,166
)
 
31,581

 
(2,880
)
 
162,520


We have assessed each security with gross unrealized losses included in the previous table for credit impairment. As part of that assessment we evaluated and concluded that we do not intend to sell any of the securities and that it is more likely than not that we will not be required to sell prior to recovery of the amortized cost basis. For debt securities, we evaluate, where necessary, whether credit impairment exists by comparing the present value of the expected cash flows to the securities’ amortized cost basis. For equity securities, we consider numerous factors in determining whether impairment exists, including our intent and ability to hold the securities for a period of time sufficient to recover the cost basis of the securities.
For descriptions of the factors we consider when analyzing securities for impairment, see Note 1 (Summary of Significant Accounting Policies) and Note 5 (Investment Securities) to Financial Statements in our 2015 Form 10-K. There were no material changes to our methodologies for assessing impairment in the first nine months of 2016
Table 4.3 shows the gross unrealized losses and fair value of debt and perpetual preferred investment securities by those rated investment grade and those rated less than investment grade, according to their lowest credit rating by Standard & Poor’s Rating Services (S&P) or Moody’s Investors Service (Moody’s). Credit ratings express opinions about the credit quality of a security. Securities rated investment grade, that is those rated BBB- or higher by S&P or Baa3 or higher by Moody’s, are generally considered by the rating agencies and market participants to be low credit risk. Conversely, securities rated below investment grade, labeled as “speculative grade” by the rating agencies, are considered to be distinctively higher credit risk than investment grade securities. We have also included securities not rated by S&P or Moody’s in the table below based on our internal credit grade of the securities (used for credit risk management purposes) equivalent to the credit rating assigned by major credit agencies. The unrealized losses and fair value of unrated securities categorized as investment grade based on internal credit grades were $63 million and $4.0 billion, respectively, at September 30, 2016, and $17 million and $3.7 billion, respectively, at December 31, 2015. If an internal credit grade was not assigned, we categorized the security as non-investment grade. 
Table 4.3: Gross Unrealized Losses and Fair Value by Investment Grade
 
Investment grade
 
 
Non-investment grade
 
(in millions)
Gross
unrealized
losses

 
Fair
value

 
Gross
unrealized
losses

 
Fair
value

September 30, 2016
 
 
 
 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
(2
)
 
2,033

 

 

Securities of U.S. states and political subdivisions
(1,509
)
 
33,572

 
(35
)
 
330

Mortgage-backed securities:
 
 
 
 
 
 
 
Federal agencies
(60
)
 
8,482

 

 

Residential
(1
)
 
150

 
(6
)
 
439

Commercial
(20
)
 
3,041

 
(47
)
 
629

Total mortgage-backed securities
(81
)
 
11,673

 
(53
)
 
1,068

Corporate debt securities
(78
)
 
1,417

 
(96
)
 
1,024

Collateralized loan and other debt obligations
(48
)
 
6,010

 

 

Other
(30
)
 
2,043

 
(5
)
 
368

Total debt securities
(1,748
)
 
56,748

 
(189
)
 
2,790

Perpetual preferred securities
(3
)
 
56

 

 

Total available-for-sale securities
(1,751
)

56,804


(189
)

2,790

Held-to-maturity securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies

 

 

 

  Securities of U.S. states and political subdivisions
(8
)
 
799

 

 

Federal agency and other mortgage-backed securities

 

 

 

Collateralized loan obligations
(2
)
 
285

 

 

Other
(1
)
 
739

 

 

Total held-to-maturity securities
(11
)
 
1,823

 

 

Total
$
(1,762
)
 
58,627

 
(189
)
 
2,790

December 31, 2015
 
 

 
 
 
 
Available-for-sale securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
(148
)
 
24,795

 

 

Securities of U.S. states and political subdivisions
(464
)
 
15,470

 
(38
)
 
360

Mortgage-backed securities:
 
 
 
 
 
 
 
Federal agencies
(828
)
 
46,217

 

 

Residential
(12
)
 
795

 
(13
)
 
766

Commercial
(59
)
 
6,361

 
(26
)
 
478

Total mortgage-backed securities
(899
)
 
53,373

 
(39
)
 
1,244

Corporate debt securities
(140
)
 
4,167

 
(309
)
 
1,831

Collateralized loan and other debt obligations
(368
)
 
27,058

 

 

Other
(43
)
 
2,915

 
(3
)
 
278

Total debt securities
(2,062
)
 
127,778

 
(389
)
 
3,713

Perpetual preferred securities
(13
)
 
133

 

 

Total available-for-sale securities
(2,075
)
 
127,911

 
(389
)
 
3,713

Held-to-maturity securities:
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
(73
)
 
5,264

 

 

Securities of U.S. states and political subdivisions

 

 

 

Federal agency and other mortgage-backed securities
(314
)
 
23,115

 

 

Collateralized loan obligations
(24
)
 
1,381

 

 

Other
(3
)
 
1,096



 

Total held-to-maturity securities
(414
)
 
30,856

 

 

Total
$
(2,489
)
 
158,767

 
(389
)
 
3,713


Contractual Maturities
Table 4.4 shows the remaining contractual maturities and contractual weighted-average yields (taxable-equivalent basis) of available-for-sale debt securities. The remaining contractual principal maturities for MBS do not consider prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations before the underlying mortgages mature.
 
Table 4.4: Contractual Maturities
  
  
 
 
Remaining contractual maturity
 
  
Total

 
  

 
Within one year
 
 
After one year
through five years
 
 
After five years
through ten years
 
 
After ten years
 
(in millions)

amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

September 30, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale debt securities (1): 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair value:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
26,376

 
1.44
%
 
$
110

 
1.39
%
 
$
25,217

 
1.42
%
 
$
1,049

 
1.80
%
 
$

 
%
Securities of U.S. states and political subdivisions
55,366

 
5.76

 
2,985

 
1.70

 
9,305

 
2.80

 
2,885

 
5.06

 
40,191

 
6.79

Mortgage-backed securities:
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Federal agencies
135,692

 
3.11

 

 

 
133

 
2.95

 
2,930

 
3.37

 
132,629

 
3.10

Residential
8,527

 
3.86

 

 

 
27

 
5.19

 
37

 
4.29

 
8,463

 
3.86

Commercial
9,860

 
4.82

 

 

 

 

 
31

 
3.15

 
9,829

 
4.82

Total mortgage-backed securities
154,079

 
3.26

 

 

 
160

 
3.33

 
2,998

 
3.38

 
150,921

 
3.26

Corporate debt securities
12,721

 
4.78

 
2,264

 
3.12

 
4,210

 
5.50

 
4,956

 
4.77

 
1,291

 
5.36

Collateralized loan and other debt obligations
35,445

 
2.53

 
1

 
1.03

 
361

 
1.32

 
16,965

 
2.48

 
18,118

 
2.61

Other
6,371

 
2.09

 
57

 
3.00

 
916

 
2.34

 
1,163

 
2.02

 
4,235

 
2.04

Total available-for-sale debt securities at fair value
$
290,358

 
3.52
%
 
$
5,417

 
2.30
%
 
$
40,169

 
2.20
%
 
$
30,016

 
3.16
%
 
$
214,756

 
3.85
%
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale debt securities (1):
 
 
 
 
 
 
 
 
`
 
 
 
 
 
 
 
 
 
 
Fair value:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
36,250

 
1.49
%
 
$
216

 
0.77
%
 
$
31,602

 
1.44
%
 
$
4,432

 
1.86
%
 
$

 
%
Securities of U.S. states and political subdivisions
49,990

 
5.82

 
1,969

 
2.09

 
7,709

 
2.02

 
3,010

 
5.25

 
37,302

 
6.85

Mortgage-backed securities:
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Federal agencies
104,546

 
3.29

 
3

 
6.55

 
373

 
1.58

 
1,735

 
3.84

 
102,435

 
3.29

Residential
8,558

 
4.17

 

 

 
34

 
5.11

 
34

 
6.03

 
8,490

 
4.16

Commercial
14,088

 
5.06

 

 

 
61

 
2.79

 

 

 
14,027

 
5.07

Total mortgage-backed securities
127,192

 
3.54

 
3

 
6.55

 
468

 
1.99

 
1,769

 
3.88

 
124,952

 
3.55

Corporate debt securities
15,411

 
4.57

 
1,960

 
3.84

 
6,731

 
4.47

 
5,459

 
4.76

 
1,261

 
5.47

Collateralized loan and other debt obligations
30,967

 
2.08

 
2

 
0.33

 
804

 
0.90

 
12,707

 
2.01

 
17,454

 
2.19

Other
5,911

 
2.05

 
68

 
2.47

 
1,228

 
2.57

 
953

 
1.94

 
3,662

 
1.89

Total available-for-sale debt securities at fair value
$
265,721

 
3.55
%
 
$
4,218

 
2.84
%
 
$
48,542

 
1.98
%
 
$
28,330

 
2.98
%
 
$
184,631

 
4.07
%
(1)
Weighted-average yields displayed by maturity bucket are weighted based on fair value and predominantly represent contractual coupon rates without effect for any related hedging derivatives.

Table 4.5 shows the amortized cost and weighted-average yields of held-to-maturity debt securities by contractual maturity.
Table 4.5: Amortized Cost by Contractual Maturity
  
  
 
 
Remaining contractual maturity
 
  
Total

 
  

 
Within one year
 
 
After one year
through five years
 
 
After five years
through ten years
 
 
After ten years
 
(in millions)
amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

 
Amount

 
Yield

September 30, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Held-to-maturity securities (1): 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortized cost:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
44,682

 
2.12
%
 
$

 
%
 
$
24,638

 
2.08
%
 
$
20,044

 
2.16
%
 
$

 
%
Securities of U.S. states and political subdivisions
2,994

 
5.86

 

 

 

 

 
203

 
7.25

 
2,791

 
5.76

Federal agency and other mortgage-backed securities
47,721

 
3.24

 

 

 

 

 



 
47,721

 
3.24

Collateralized loan obligations
1,406

 
2.42

 

 

 

 

 
1,406

 
2.42

 

 

Other
2,438

 
1.69

 

 

 
1,790

 
1.69

 
648

 
1.68

 

 

Total held-to-maturity debt securities at amortized cost
$
99,241

 
2.76
%
 
$

 
%
 
$
26,428

 
2.05
%
 
$
22,301

 
2.21
%
 
$
50,512

 
3.38
%
December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Held-to-maturity securities (1):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortized cost:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
44,660

 
2.12
%
 
$

 
%
 
$
1,276

 
1.75
%
 
$
43,384

 
2.13
%
 
$

 
%
Securities of U.S. states and political subdivisions
2,185

 
5.97

 

 

 

 

 
104

 
7.49

 
2,081

 
5.89

Federal agency and other mortgage-backed securities
28,604

 
3.47

 

 

 

 

 

 

 
28,604

 
3.47

Collateralized loan obligations
1,405

 
2.03

 

 

 

 

 

 

 
1,405

 
2.03

Other
3,343

 
1.68

 

 

 
2,351

 
1.74

 
992

 
1.53

 

 

Total held-to-maturity debt securities at amortized cost
$
80,197

 
2.69
%
 
$

 
%
 
$
3,627

 
1.74
%
 
$
44,480

 
2.13
%
 
$
32,090

 
3.57
%
(1)
Weighted-average yields displayed by maturity bucket are weighted based on amortized cost and predominantly represent contractual coupon rates.

Table 4.6 shows the fair value of held-to-maturity debt securities by contractual maturity.

Table 4.6: Fair Value by Contractual Maturity
  
  

 
Remaining contractual maturity
 
  
Total

 
Within one year

 
After one year
through five years

 
After five years
through ten years

 
After ten years

(in millions)
amount

 
Amount

 
Amount

 
Amount

 
Amount

September 30, 2016
 
 
 
 
 
 
 
 
 
Held-to-maturity securities:
 
 
 
 
 
 
 
 
 
Fair value:
 
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
46,891

 

 
25,782

 
21,109

 

Securities of U.S. states and political subdivisions
3,107

 

 

 
213

 
2,894

Federal agency and other mortgage-backed securities
48,690

 

 

 

 
48,690

Collateralized loan obligations
1,411

 

 

 
1,411

 

Other
2,448

 

 
1,795

 
653

 

Total held-to-maturity debt securities at fair value
$
102,547

 

 
27,577

 
23,386

 
51,584

December 31, 2015
  
 
 
 
 
 
 
 
 
Held-to-maturity securities:
  
 
 
 
 
 
 
 
 
Fair value:
  
 
 
 
 
 
 
 
 
Securities of U.S. Treasury and federal agencies
$
45,167

 

 
1,298

 
43,869

 

Securities of U.S. states and political subdivisions
2,250

 

 

 
105

 
2,145

Federal agency and other mortgage-backed securities
28,421

 

 

 

 
28,421

Collateralized loan obligations
1,381

 

 

 

 
1,381

Other
3,348

 

 
2,353

 
995

 

Total held-to-maturity debt securities at fair value
$
80,567

 

 
3,651

 
44,969

 
31,947


Realized Gains and Losses
Table 4.7 shows the gross realized gains and losses on sales and OTTI write-downs related to the available-for-sale securities portfolio, which includes marketable equity securities, as well as net realized gains and losses on nonmarketable equity investments (see Note 6 (Other Assets)).
Table 4.7: Realized Gains and Losses
  
Quarter ended Sep 30,
 
 
Nine months ended Sep 30,
 
(in millions)
2016

 
2015

 
2016

 
2015

Gross realized gains
$
266

 
530

 
1,215

 
1,133

Gross realized losses
(23
)
 
(21
)
 
(67
)
 
(57
)
OTTI write-downs
(52
)
 
(74
)
 
(147
)
 
(125
)
Net realized gains from available-for-sale securities
191

 
435

 
1,001

 
951

Net realized gains from nonmarketable equity investments
55

 
632

 
369

 
1,462

Net realized gains from debt securities and equity investments
$
246

 
1,067

 
1,370

 
2,413



Other-Than-Temporary Impairment
Table 4.8 shows the detail of total OTTI write-downs included in earnings for available-for-sale debt securities, marketable equity securities and nonmarketable equity investments. There were no OTTI write-downs on held-to-maturity securities during the first nine months of 2016 and 2015.
Table 4.8: OTTI Write-downs
 
Quarter ended Sep 30,
 
 
Nine months ended Sep 30,
 
(in millions)
2016

 
2015

 
2016

 
2015

OTTI write-downs included in earnings
 
 
 
 
 
 
 
Debt securities:
 
 
 
 
  
 
  
Securities of U.S. states and political subdivisions
$
30

 
2

 
40

 
18

Mortgage-backed securities:
 
 
 
 
  

 
  

Residential
4

 
9

 
28

 
43

Commercial
10

 
3

 
11

 
3

Corporate debt securities
7

 
59

 
57

 
59

Other debt securities

 

 
6

 

Total debt securities
51

 
73

 
142

 
123

Equity securities:
 
 
 
 
  

 
  

Marketable equity securities:
 
 
 
 
  

 
 
Other marketable equity securities
1

 
1

 
5

 
2

Total marketable equity securities
1

 
1

 
5

 
2

Total investment securities (1)
52

 
74

 
147

 
125

Nonmarketable equity investments (1)
84

 
66

 
317

 
183

Total OTTI write-downs included in earnings (1)
$
136

 
140

 
464

 
308


(1)
The quarter ended September 30, 2016, includes $32 million in OTTI write-downs of oil and gas investments, of which $6 million related to investment securities and $26 million related to nonmarketable equity investments. Oil and gas related OTTI for the first nine months of 2016 totaled $185 million, of which $57 million related to investment securities and $128 million related to nonmarketable equity investments.
Other-Than-Temporarily Impaired Debt Securities
Table 4.9 shows the detail of OTTI write-downs on available-for-sale debt securities included in earnings and the related changes in OCI for the same securities.
Table 4.9: OTTI Write-downs Included in Earnings
  
Quarter ended Sep 30,
 
 
Nine months ended Sep 30,
 
(in millions)
2016

 
2015

 
2016

 
2015

OTTI on debt securities
 
 
 
 
  

 
  

Recorded as part of gross realized losses:
 
 
 
 
  

 
  

Credit-related OTTI
$
21

 
70

 
102

 
109

Intent-to-sell OTTI
30

 
3

 
40

 
14

Total recorded as part of gross realized losses
51

 
73

 
142

 
123

Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1):
 
 
 
 
  

 
 
Securities of U.S. states and political subdivisions

 

 

 
(1
)
Residential mortgage-backed securities
(4
)
 
(6
)
 
1

 
(37
)
Commercial mortgage-backed securities
(11
)
 
2

 
(9
)
 
(13
)
Corporate debt securities

 
1

 
(13
)
 
1

Other debt securities

 

 
2

 

Total changes to OCI for non-credit-related OTTI
(15
)
 
(3
)
 
(19
)
 
(50
)
Total OTTI losses recorded on debt securities
$
36

 
70

 
123

 
73

(1)
Represents amounts recorded to OCI for impairment, due to factors other than credit, on debt securities that have also had credit-related OTTI write-downs during the period. Increases represent initial or subsequent non-credit-related OTTI on debt securities. Decreases represent partial to full reversal of impairment due to recoveries in the fair value of securities due to non-credit factors.
 
Table 4.10 presents a rollforward of the OTTI credit loss that has been recognized in earnings as a write-down of available-for-sale debt securities we still own (referred to as "credit-impaired" debt securities) and do not intend to sell. Recognized credit loss represents the difference between the present value of expected future cash flows discounted using the security’s current effective interest rate and the amortized cost basis of the security prior to considering credit loss.
Table 4.10: Rollforward of OTTI Credit Loss
 
Quarter ended Sep 30,
 
 
Nine months ended Sep 30,
 
(in millions)
2016

 
2015

 
2016

 
2015

Credit loss recognized, beginning of period
$
1,080

 
993

 
1,092

 
1,025

Additions:
 
 
 
 
  
 
  
For securities with initial credit impairments
16

 
64

 
54

 
64

For securities with previous credit impairments
5

 
6

 
48

 
45

Total additions
21

 
70

 
102

 
109

Reductions:
 
 
 
 
  
 
  
For securities sold, matured, or intended/required to be sold
(22
)
 
(23
)
 
(111
)
 
(89
)
For recoveries of previous credit impairments (1)
(2
)
 
(1
)
 
(6
)
 
(6
)
Total reductions
(24
)
 
(24
)
 
(117
)
 
(95
)
Credit loss recognized, end of period
$
1,077

 
1,039

 
1,077

 
1,039

(1)
Recoveries of previous credit impairments result from increases in expected cash flows subsequent to credit loss recognition. Such recoveries are reflected prospectively as interest yield adjustments using the effective interest method.