By MATTHEW CRAFT, AP Business Writer

NEW YORK (AP) - Poor corporate earnings reports pounded the stock market Friday in a sour end to an otherwise strong week of trading. The Dow Jones industrial average fell more than 200 points for its worst day in four months.

Disappointing results from three giants of the Dow - Microsoft (MSFT), General Electric (GE) and McDonald's (MCD) - were to blame. But the broader market fell, too, and the Standard & Poor's 500 index fared even worse in percentage terms.

The Dow sank 205.43 points, or 1.5 percent, to close at 13,343.51. The S&P lost 24.15, or 1.7 percent, to 1,433.19. The Nasdaq composite index, hammered by a second ugly day for Google (GOOG), lost 67.25 points to 3,005.62, a 2.2 percent decline.

The big drops Friday left the Dow and S&P clinging to gains for the week. Read more;