1 EXHIBIT 11 HOUSTON INDUSTRIES INCORPORATED AND SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON SHARE AND COMMON EQUIVALENT SHARE (THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS) Three Months Ended Six Months Ended June 30, June 30, ------------------------------ ------------------------------ 1997 1996 1997 1996 ------------ ------------ ------------ ------------ Primary Earnings Per Share: (1) Weighted average shares of common stock outstanding . . . . . . 233,918,869 248,656,061 233,804,728 248,561,076 (2) Effect of issuance of shares from assumed exercise of stock options (treasury stock method) . . . . . . . (29,987) 18,885 (7,033) (15,577) ------------ ------------ ------------ ------------ (3) Weighted average shares . . . . . . . 233,888,882 248,674,946 233,797,695 248,545,499 ============ ============ ============ ============ (4) Net income . . . . . . . . . . . . . $ 121,463 $ 145,334 $ 181,083 $ 128,594 (5) Primary earnings per share (line 4/line 3) . . . . . . . . . . . $ 0.52 $ 0.58 $ 0.77 $ 0.52 Fully Diluted Earnings Per Share: (6) Weighted average shares per computation on line 3 above . . . . . 233,888,882 248,674,946 233,797,695 248,545,499 (7) Shares applicable to options included on line 2 above . . . . . . 29,987 (18,885) 7,033 15,577 (8) Dilutive effect of stock options based on the average price for the period or period- end price, whichever is higher ($21.44 and $24.63 for the second quarter of 1997 and 1996, respectively, and $21.63 and $24.63 for the first six months Of 1997 and 1996,respectively) (treasury stock method) . . . . . . . (12,605) 58,282 (7,033) 58,283 ------------ ------------ ------------ ------------ (9) Weighted average shares . . . . . . . 233,906,264 248,714,343 233,797,695 248,619,359 ============ ============ ============ ============ (10) Net income . . . . . . . . . . . . . $ 121,463 $ 145,334 $ 181,083 $ 128,594 (11) Fully diluted earnings per share (line 10/line 9) . . . . . . . $ 0.52 $ 0.58 $ 0.77 $ 0.52 Notes: These calculations are submitted in accordance with Regulation S-K item 601(b)(11), although it is not required for financial presentation disclosure per footnote 2 to paragraph 14 of Accounting Principles Board (APB) Opinion No. 15 because it does not meet the 3% dilutive test. The calculations for the quarters and six months ended June 30, 1997 and 1996 are submitted in accordance with Regulation S-K item 601(b)(11), although they are contrary to paragraphs 30 and 40 of APB No. 15 because they produce anti-dilutive results.