2. AGENCY MORTGAGE-BACKED SECURITIES

The following tables present the Company’s available-for-sale Agency mortgage-backed securities portfolio as of March 31, 2013 and December 31, 2012 which were carried at their fair value:

March 31, 2013	Freddie Mac			Fannie Mae			Ginnie Mae			Total Mortgage- Backed Securities
	(dollars in thousands)

Agency mortgage-backed securities, par value	$	39,115,499		$	61,622,413		$	239,955		$	100,977,867
Unamortized discount		(12,573	)		(13,692	)		(388	)		(26,653	)
Unamortized premium		1,959,152			3,398,430			36,257			5,393,839
Amortized cost		41,062,078			65,007,151			275,824			106,345,053

Gross unrealized gains		818,602			1,516,324			15,965			2,350,891
Gross unrealized losses		(166,212	)		(271,927	)		(1,134	)		(439,273	)

Estimated fair value	$	41,714,468		$	66,251,548		$	290,655		$	108,256,671

	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
	(dollars in thousands)

Adjustable rate	$	4,938,813	$	223,387	$	(2,401	)	$	5,159,799
Fixed rate		101,406,240		2,127,504		(436,872	)		103,096,872

Total	$	106,345,053	$	2,350,891	$	(439,273	)	$	108,256,671

December 31, 2012	Freddie Mac			Fannie Mae			Ginnie Mae			Total Mortgage- Backed Securities
	(dollars in thousands)

Agency mortgage-backed securities, par value	$	44,296,234		$	70,649,782		$	273,988		$	115,220,004
Unamortized discount		(9,515	)		(12,315	)		(389	)		(22,219	)
Unamortized premium		2,121,478			3,695,381			39,348			5,856,207
Amortized cost		46,408,197			74,332,848			312,947			121,053,992

Gross unrealized gains		1,166,299			1,913,334			17,583			3,097,216
Gross unrealized losses		(36,890	)		(146,533	)		(4,578	)		(188,001	)

Estimated fair value	$	47,537,606		$	76,099,649		$	325,952		$	123,963,207

	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Estimated Fair Value
	(dollars in thousands)

Adjustable rate	$	5,786,718	$	259,013	$	(4,613	)	$	6,041,118
Fixed rate		115,267,274		2,838,203		(183,388	)		117,922,089

Total	$	121,053,992	$	3,097,216	$	(188,001	)	$	123,963,207

Actual maturities of Agency mortgage-backed securities are generally shorter than stated contractual maturities because actual maturities of Agency mortgage-backed securities are affected by the contractual lives of the underlying mortgages, periodic payments and prepayments of principal. The following table summarizes the Company’s Agency mortgage-backed securities as of March 31, 2013 and December 31, 2012, according to their estimated weighted-average life classifications:

	March 31, 2013				December 31, 2012

Weighted-Average Life	Fair Value		Amortized Cost		Fair Value		Amortized Cost
	(dollars in thousands)
Less than one year	$	655,460	$	652,987	$	1,264,094	$	1,250,405
Greater than one year through five years		98,984,676		97,021,498		119,288,168		116,510,310
Greater than five years through ten years		8,487,896		8,543,055		3,104,073		2,992,054
Greater than 10 years		128,639		127,513		306,872		301,223
Total	$	108,256,671	$	106,345,053	$	123,963,207	$	121,053,992

The weighted-average lives of the Agency mortgage-backed securities at March 31, 2013 and December 31, 2012 in the table above are based upon data provided through subscription-based financial information services, assuming constant principal prepayment rates to the reset date of each security. The prepayment model considers current yield, forward yield, steepness of the yield curve, current mortgage rates, mortgage rate of the outstanding loans, loan age, margin, volatility, and other factors. The actual weighted average lives of the Agency mortgage-backed securities could be longer or shorter than estimated.

The following table presents the gross unrealized losses and estimated fair value of the Company’s Agency mortgage-backed securities by length of time that such securities have been in a continuous unrealized loss position at March 31, 2013 and December 31, 2012.

	Unrealized Loss Position For: (dollars in thousands)
	Less than 12 Months							12 Months or More							Total
	Estimated Fair Value		Unrealized Losses			Number of Securities		Estimated Fair Value		Unrealized Losses			Number of Securities		Estimated Fair Value		Unrealized Losses			Number of Securities

March 31, 2013	$	39,235,229	$	(364,700	)		376	$	120,653	$	(74,573	)		31	$	39,355,882	$	(439,273	)		407

December 31, 2012	$	11,220,514	$	(82,721	)		187	$	147,775	$	(105,280	)		39	$	11,368,289	$	(188,001	)		226

The decline in value of these securities is solely due to market conditions and not the quality of the assets. Substantially all of the Agency mortgage-backed securities are “AAA” rated or carry an implied “AAA” rating. The investments are not considered to be other-than-temporarily impaired because the Company currently has the ability and intent to hold the investments to maturity or for a period of time sufficient for a forecasted market price recovery up to or beyond the cost of the investments, and it is not more likely than not that the Company will be required to sell the investments before recovery of the amortized cost bases, which may be maturity. Also, the Company is guaranteed payment of the principal amount of the securities by the respective issuing government agency.

During the quarter ended March 31, 2013, the Company sold $16.3 billion of Agency mortgage-backed securities, resulting in a net realized gain of $182.8 million. During the quarter ended March 31, 2012, the Company sold $5.1 billion of Agency mortgage-backed securities, resulting in a net realized gain of $80.3 million. Average cost is used as the basis on which the realized gain or loss on sale is determined.

Agency interest-only mortgage-backed securities represent the right to receive a specified portion of the contractual interest flows of the underlying unamortized principal balance of specific Agency mortgage-backed securities. As of March 31, 2013, Agency interest-only mortgage-backed securities had net unrealized losses of $64.5 million (consisting of net unrealized losses of $86.5 million included in accumulated deficit and net unrealized gains of $21.9 million included in other comprehensive income) and an amortized cost of $807.1 million.