EXHIBIT 11.1 MGIC INVESTMENT CORPORATION AND SUBSIDIARIES STATEMENT RE COMPUTATION OF NET INCOME PER SHARE Three and Nine Month Periods Ended September 30, 1998 and 1997 Three Months Ended Nine Months Ended September 30, September 30, ------------------ ----------------- 1998 1997 1998 1997 ---- ---- ---- ---- (In thousands of dollars, except per share data) BASIC EARNINGS PER SHARE Average common shares outstanding 111,417 114,935 113,184 117,109 ======== ======== ======== ======== Net income $ 96,492 $ 84,175 $285,751 $237,226 ======== ======== ======== ======== Basic earnings per share $ 0.87 $ 0.73 $ 2.52 $ 2.03 ======== ======== ======== ======== DILUTED EARNINGS PER SHARE Adjusted shares outstanding: Average common shares outstanding 111,417 114,935 113,184 117,109 Net shares to be issued upon exercise of dilutive stock options after applying treasury stock method 1,278 1,451 1,544 1,333 -------- -------- -------- -------- Adjusted shares outstanding 112,695 116,386 114,728 118,442 ======== ======== ======== ======== Net income $ 96,492 $ 84,175 $285,751 $237,226 ======== ======== ======== ======== Diluted earnings per share $ 0.86 $ 0.72 $ 2.49 $ 2.00 ======== ======== ======== ========