EXHIBIT 11 CAPSTEAD MORTGAGE CORPORATION COMPUTATION OF NET INCOME PER SHARE* (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) QUARTER ENDED SIX MONTHS ENDED JUNE 30 JUNE 30 ------------------ -------------------- 1996 1995 1996 1995 -------- -------- --------- --------- PRIMARY: Average number of common shares outstanding 24,352 22,983 24,094 22,970 Incremental shares calculated using the Treasury Stock method 480 6 429 6 ------- ------- -------- -------- 24,832 22,989 24,523 22,976 ======= ======= ======= ======== Net income $32,173 $17,739 $ 59,001 $ 33,105 Less cash dividends paid on convertible preferred stock: Series A ($0.40 per share) (206) (239) (420) (487) Series B ($0.315 per share) (9,594) (9,584) (19,270) (19,134) ------- ------- -------- -------- Net income available to common stockholders $22,373 $ 7,916 $ 39,311 $ 13,484 ======= ======= ======= ======== Primary net income per share $0.90 $0.35 $1.60 $0.59 FULLY DILUTED: Average number of common shares outstanding 24,352 22,983 24,094 22,970 Assumed conversion of convertible preferred stock: Series A 710 822 720 831 Series B 14,743 ** 14,734 ** Incremental shares calculated using the Treasury Stock method 679 8 685 6 ------- ------- -------- -------- 40,484 23,813 40,233 23,807 ======= ======= ======= ======== Net income $32,173 $17,739 $ 59,001 $ 33,105 Less cash dividends paid on the Series B Preferred Stock - (9,584) - (19,134) ------- ------- -------- -------- Net income $32,173 $ 8,155 $ 59,001 $ 13,971 ======= ======= ======= ======== Fully diluted net income per share $0.79 $0.34 $1.47 $0.59 * NOT ADJUSTED FOR THE 3-FOR-2 COMMON STOCK SPLIT PAYABLE ON AUGUST 15, 1996 TO STOCKHOLDERS OF RECORD ON JULY 31, 1996. ** THE SERIES B PREFERRED STOCK WAS NOT CONSIDERED CONVERTIBLE FOR PURPOSES OF CALCULATING FULLY DILUTED NET INCOME PER SHARE IN 1995 AS IT WAS ANTIDILUTIVE.