EXHIBIT 11 CAPSTEAD MORTGAGE CORPORATION COMPUTATION OF NET INCOME PER SHARE (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) QUARTER ENDED NINE MONTHS ENDED SEPTEMBER 30 SEPTEMBER 30 ------------------ -------------------- 1996 1995 1996 1995 -------- -------- --------- --------- PRIMARY: Average number of common shares outstanding 38,319 34,614 36,872 34,508 Incremental shares calculated using the Treasury Stock method 883 54 856 25 ------- ------- -------- -------- 39,202 34,668 37,728 34,533 ======= ======= ======== ======== Net income $32,428 $21,297 $ 91,429 $ 54,401 Less cash dividends paid on convertible preferred stock: Series A ($0.40 per share) (195) (230) (616) (718) Series B ($0.315 per share) (8,643) (9,616) (27,908) (28,749) ------- ------- -------- -------- Net income available to common stockholders $23,590 $11,451 $ 62,905 $ 24,934 ======= ======= ======== ======== Primary net income per share $0.60 $0.33 $1.67 $0.72 ======= ======= ======== ======== FULLY DILUTED: Average number of common shares outstanding 38,319 34,614 36,872 34,508 Assumed conversion of convertible preferred stock: Series A 1,032 1,184 1,070 1,224 Series B 21,514 * 22,016 * Incremental shares calculated using the Treasury Stock method 892 185 1,173 185 ------- ------- -------- -------- 61,757 35,983 61,131 35,917 ======= ======= ======== ======== Net income $32,428 $21,297 $ 91,429 $ 54,401 Less cash dividends paid on the Series B Preferred Stock - (9,616) - (28,749) ------- ------- -------- -------- Net income $32,428 $11,681 $ 91,429 $ 25,652 ======= ======= ======== ======== Fully diluted net income per share $0.53 $0.32 $1.50 $0.72 ======= ======= ======== ======== * THE SERIES B PREFERRED STOCK IS NOT CONSIDERED CONVERTIBLE FOR PURPOSES OF CALCULATING FULLY DILUTED NET INCOME PER SHARE AS IT WAS ANTIDILUTIVE.