NOTE 4 — RESIDENTIAL MORTGAGE INVESTMENTS

Residential mortgage investments classified by collateral type and interest rate characteristics were as follows (dollars in thousands):


	*Unpaid* *Principal* *Balance*		Investment Premiums		Amortized Cost Basis		*Carrying* *Amount* ^(a)		*Net* *WAC* ^(b)			*Average* *Yield* ^(b^⁾
*March 31, 2013*
Agency Securities:
Fannie Mae/Freddie Mac:
Fixed-rate	$	2,983	$	8	$	2,991	$	2,995		6.70	%		6.49	%
ARMs		11,526,720		363,510		11,890,230		12,178,281		2.67			1.70
Ginnie Mae ARMs		1,582,786		49,478		1,632,264		1,662,953		2.70			1.90

		13,112,489		412,996		13,525,485		13,844,229		2.68			1.72

Residential mortgage loans:
Fixed-rate		2,947		5		2,952		2,952		7.00			5.88
ARMs		4,740		19		4,759		4,759		3.85			3.53

		7,687		24		7,711		7,711		5.05			4.42
Collateral for structured financings		2,425		40		2,465		2,465		8.11			6.80

	$	13,122,601	$	413,060	$	13,535,661	$	13,854,405		2.68			1.73

*December 31, 2012*
Agency Securities:
Fannie Mae/Freddie Mac:
Fixed-rate	$	3,194	$	9	$	3,203	$	3,208		6.70	%		6.47	%
ARMs		11,547,954		356,646		11,904,600		12,198,922		2.69			1.72
Ginnie Mae ARMs		1,566,749		48,248		1,614,997		1,647,119		2.77			1.95

		13,117,897		404,903		13,522,800		13,849,249		2.70			1.75

Residential mortgage loans:
Fixed-rate		3,007		5		3,012		3,012		7.01			6.15
ARMs		5,031		20		5,051		5,051		3.87			3.85

		8,038		25		8,063		8,063		5.04			4.71
Collateral for structured financings		2,799		47		2,846		2,846		8.12			7.57

	$	13,128,734	$	404,975	$	13,533,709	$	13,860,158		2.71			1.76

(a)

Includes unrealized gains and losses for residential mortgage investments classified as available-for-sale (see NOTE 9).

(b)

Net WAC, or weighted average coupon, is the weighted average interest rate of the mortgage loans underlying the indicated investments net of servicing and other fees as of the indicated balance sheet date. Net WAC is expressed as a percentage calculated on an annualized basis on the unpaid principal balances of the mortgage loans underlying these investments. Average yield is presented for the quarter then ended, and is based on the cash component of interest income expressed as a percentage calculated on an annualized basis on average amortized cost basis (the “cash yield”) less the effects of amortizing investment premiums. Investment premium amortization is determined using the interest method and incorporates actual and anticipated future mortgage prepayments.

Agency Securities are considered to have limited, if any, credit risk, because of federal government support for the GSEs. Residential mortgage loans held by the Company were originated prior to 1995 when Capstead operated a mortgage conduit and the related credit risk is borne by the Company. Collateral for structured financings consists of private residential mortgage securities that were obtained through this mortgage conduit and are pledged to secure repayment of related structured financings. Credit risk for these securities is borne by the related bondholders. The maturity of Residential mortgage investments is directly affected by prepayments of principal on the underlying mortgage loans. Consequently, actual maturities will be significantly shorter than the portfolio’s weighted average contractual maturity of 292 months.

Fixed-rate investments consist of residential mortgage loans and Agency Securities backed by residential mortgage loans with fixed rates of interest. Adjustable-rate investments generally are ARM Agency Securities backed by residential mortgage loans that have coupon interest rates that adjust at least annually to more current interest rates or begin doing so after an initial fixed-rate period. After the initial fixed-rate period, if applicable, mortgage loans underlying ARM securities either (i) adjust annually based on specified margins over the one-year Constant Maturity U.S. Treasury Note Rate (“CMT”) or the one-year London interbank offered rate (“LIBOR”), (ii) adjust semiannually based on specified margins over six-month LIBOR, or (iii) adjust monthly based on specified margins over indices such as one-month LIBOR, the Eleventh District Federal Reserve Bank Cost of Funds Index, or over a rolling twelve month average of the one-year CMT index, usually subject to periodic and lifetime limits, or caps, on the amount of such adjustments during any single interest rate adjustment period and over the contractual term of the underlying loans.

Capstead classifies its ARM securities based on each security’s average number of months until coupon reset (“months to roll”). Months to roll is an indicator of asset duration which is a measure of market price sensitivity to interest rate movements. Current-reset ARM securities have months to roll of less than 18 months while longer-to-reset ARM securities have months to roll of 18 months or greater. As of March 31, 2013, the average months to roll for the Company’s $7.65 billion (amortized cost basis) in current-reset ARM securities was 5.4 months while the average months-to-roll for the Company’s $5.87 billion (amortized cost basis) in longer-to-reset ARM securities was 42.5 months.