EXHIBIT 12 CAPSTEAD MORTGAGE CORPORATION AND SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (IN THOUSANDS, EXCEPT RATIOS) (UNAUDITED) (a) Computation of ratio of earnings to combined fixed charges and preferred stock dividends (including CMO debt): YEAR ENDED DECEMBER 31 ------------------------------------------------ 1996 1995 1994 1993 1992 -------- -------- -------- -------- -------- Fixed charges $598,312 $584,137 $474,844 $491,076 $415,433 Preferred stock dividends 36,356 39,334 38,876 38,592 4,707 -------- -------- -------- -------- -------- Combined fixed charges and preferred stock dividends 634,668 623,471 513,720 529,668 420,140 Net income 127,228 77,359 85,579 94,256 53,191 -------- -------- -------- -------- -------- Total $761,896 $700,830 $599,299 $623,924 $473,331 ======== ======== ======== ======== ======== Ratio of earnings to combined fixed charges and preferred stock dividends 1.20:1 1.12:1 1.17:1 1.18:1 1.13:1 ======== ======== ======== ======== ======== (b) Computation of ratio of earnings to combined fixed charges and preferred stock dividends (excluding CMO debt): YEAR ENDED DECEMBER 31 ------------------------------------------------ 1996 1995 1994 1993 1992 -------- -------- -------- -------- -------- Fixed charges $283,974 $223,751 $139,188 $ 80,923 $ 62,077 Preferred stock dividends 36,356 39,334 38,876 38,592 4,707 -------- -------- -------- -------- -------- Combined fixed charges and preferred stock dividends 320,330 263,085 178,064 119,515 66,784 Net income 127,228 77,359 85,579 94,256 53,191 -------- -------- -------- -------- -------- Total $447,558 $340,444 $263,643 $213,771 $119,975 ======== ======== ======== ======== ======== Ratio of earnings to combined fixed charges and preferred stock dividends 1.40:1 1.29:1 1.48:1 1.79:1 1.80:1 ======== ======== ======== ======== ========