EXHIBIT 12.1 COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS EXHIBIT 12.1 CAPSTEAD MORTGAGE CORPORATION 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 ---------------------------------------------------- 1993 1992 1991 1990 1989 -------- -------- -------- -------- -------- Fixed charges $491,076 $415,433 $189,840 $144,478 $109,801 Preferred stock dividends 38,592 4,707 7,499 8,746 1,312 -------- -------- -------- -------- -------- Combined fixed charges and preferred stock dividends 529,668 420,140 197,339 153,224 111,113 Net income 94,256 53,191 33,717 29,082 16,375 -------- -------- -------- -------- -------- Total $623,924 $473,331 $231,056 $182,306 $127,488 ======== ======== ======== ======== ======== Ratio of earnings to combined fixed charges and preferred stock dividends 1.18:1 1.13:1 1.17:1 1.19:1 1.15:1 ======== ======== ======== ======== ======== (b) Computation of ratio of earnings to combined fixed charges and preferred stock dividends (excluding CMO debt): YEAR ENDED DECEMBER 31 ---------------------------------------------------- 1993 1992 1991 1990 1989 -------- -------- -------- -------- -------- Fixed charges $ 80,923 $ 62,077 $31,474 $ 8,519 $13,645 Preferred stock dividends 38,592 4,707 7,499 8,746 1,312 -------- -------- ------- ------- ------- Combined fixed charges and preferred stock dividends 119,515 66,784 38,973 17,265 14,957 Net income 94,256 53,191 33,717 29,082 16,375 -------- -------- ------- ------- ------- Total $213,771 $119,975 $72,690 $46,347 $31,332 ======== ======== ======= ======= ======= Ratio of earnings to combined fixed charges and preferred stock dividends 1.79:1 1.80:1 1.87:1 2.68:1 2.09:1 ======== ======== ======= ======= =======