INVESTMENTS AND RESTRICTED CASH

The following is a summary of marketable securities classified as trading and available-for-sale as of September 30, 2014 and December 31, 2013 (in millions):



	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
September 30, 2014
Current marketable securities:
U.S. government and agency debt securities	$	338	$	—	$	(1	)	$	337
Mortgage and asset-backed debt securities	95		1		(1		)	95
Corporate debt securities	817		1		—			818
Other debt and equity securities	117		—		—			117
Total marketable securities	$	1,367	$	2	$	(2	)	$	1,367

December 31, 2013
Current marketable securities:
U.S. government and agency debt securities	$	355	$	—	$	(1	)	$	354
Mortgage and asset-backed debt securities	76		1		(2		)	75
Corporate debt securities	146		1		(1		)	146
Other debt and equity securities	5		—		—			5
Total marketable securities	$	582	$	2	$	(4	)	$	580

Of the total investments in marketable securities listed above, $780 million and $0 as of September 30, 2014 and December 31, 2013, respectively, have been classified as "trading", with unrealized gains and losses recognized in investment income within the statements of consolidated income.

Investment Other-Than-Temporary Impairments

We have concluded that no other-than-temporary impairment losses existed as of September 30, 2014. In making this determination, we considered the financial condition and prospects of the issuers, the magnitude of the losses compared with the investments’ cost, the length of time the investments have been in an unrealized loss position, the probability that we will be unable to collect all amounts due according to the contractual terms of the securities, the credit rating of the securities and our ability and intent to hold these investments until the anticipated recovery in market value occurs.

Maturity Information

The amortized cost and estimated fair value of marketable securities at September 30, 2014, by contractual maturity, are shown below (in millions). Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.



	Cost		Estimated Fair Value
Due in one year or less	$	807	$	807
Due after one year through three years	450		450
Due after three years through five years	15		15
Due after five years	93		93
	1,365		1,365
Equity securities	2		2
	$	1,367	$	1,367

Non-Current Investments and Restricted Cash

We had $426 and $425 million of restricted cash related to our self-insurance requirements as of September 30, 2014 and December 31, 2013, respectively, which is reported in “Non-Current Investments and Restricted Cash” on the consolidated balance sheets. This restricted cash is invested in money market funds and similar cash equivalent type assets.

At September 30, 2014 and December 31, 2013, we held a $19 million investment in a variable life insurance policy to fund benefits for the UPS Excess Coordinating Benefit Plan. This investment is classified as “Non-Current Investments and Restricted Cash” in the consolidated balance sheets, with the quarterly change in investment value recognized in the statements of consolidated income.

Fair Value Measurements

Marketable securities utilizing Level 1 inputs include active exchange-traded equity securities and equity index funds, and most U.S. Government debt securities, as these securities all have quoted prices in active markets. Marketable securities utilizing Level 2 inputs include asset-backed securities, corporate bonds and municipal bonds. These securities are valued using market corroborated pricing, matrix pricing or other models that utilize observable inputs such as yield curves.

We maintain holdings in certain investment partnerships that are measured at fair value utilizing Level 3 inputs (classified as “Other investments” in the tables below and as “Other Non-Current Assets” in the consolidated balance sheets). These partnership holdings do not have quoted prices, nor can they be valued using inputs based on observable market data. These investments are valued internally using a discounted cash flow model with two significant inputs: (1) the after-tax cash flow projections for each partnership and (2) the risk-adjusted discount rate consistent with the duration of the expected cash flows for each partnership. The weighted-average discount rates used to value these investments were 8.15% and 8.65% as of September 30, 2014 and December 31, 2013, respectively. These inputs, and the resulting fair values, are updated on a quarterly basis.

The following table presents information about our investments measured at fair value on a recurring basis as of September 30, 2014 and December 31, 2013, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value (in millions):



	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
September 30, 2014
Marketable Securities:
U.S. government and agency debt securities	$	337	$	—	$	—	$	337
Mortgage and asset-backed debt securities	—		95		—		95
Corporate debt securities	—		818		—		818
Other debt and equity securities	—		117		—		117
Total marketable securities	337		1,030		—		1,367
Other investments	19		—		84		103
Total	$	356	$	1,030	$	84	$	1,470



December 31, 2013
Marketable Securities:
U.S. government and agency debt securities	$	353	$	1	$	—	$	354
Mortgage and asset-backed debt securities	—		75		—		75
Corporate debt securities	—		146		—		146
Other debt and equity securities	—		5		—		5
Total marketable securities	353		227		—		580
Other investments	19		—		110		129
Total	$	372	$	227	$	110	$	709

The following table presents the changes in the above Level 3 instruments measured on a recurring basis for the three months ended September 30, 2014 and 2013 (in millions):



	Marketable Securities		Other Investments			Total
Balance on July 1, 2014	$	—	$	95		$	95
Transfers into (out of) Level 3	—		—			—
Net realized and unrealized gains (losses):
Included in earnings (in investment income)	—		(11		)	(11		)
Included in accumulated other comprehensive income (pre-tax)	—		—			—
Purchases	—		—			—
Sales	—		—			—
Balance on September 30, 2014	$	—	$	84		$	84

Balance on July 1, 2013	$	—	$	136		$	136
Transfers into (out of) Level 3	—		—			—
Net realized and unrealized gains (losses):
Included in earnings (in investment income)	—		(13		)	(13		)
Included in accumulated other comprehensive income (pre-tax)	—		—			—
Purchases	—		—			—
Sales	—		—			—
Balance on September 30, 2013	$	—	$	123		$	123

The following table presents the changes in the above Level 3 instruments measured on a recurring basis for the nine months ended September 30, 2014 and 2013 (in millions):



	Marketable Securities		Other Investments			Total
Balance on January 1, 2014	$	—	110			110
Transfers into (out of) Level 3	—		—			—
Net realized and unrealized gains (losses):
Included in earnings (in investment income)	—		(26		)	(26		)
Included in accumulated other comprehensive income (pre-tax)	—		—			—
Purchases	—		—			—
Sales	—		—			—
Balance on September 30, 2014	$	—	$	84		$	84

Balance on January 1, 2013	$	—	163			163
Transfers into (out of) Level 3	—		—			—
Net realized and unrealized gains (losses):
Included in earnings (in investment income)	—		(40		)	(40		)
Included in accumulated other comprehensive income (pre-tax)	—		—			—
Purchases	—		—			—
Sales	—		—			—
Balance on September 30, 2013	$	—	$	123		$	123

There were no transfers of investments between Level 1 and Level 2 during the three and nine months ended September 30, 2014 and 2013.