Wall Street opens lower as earnings disappoint

Stocks opened lower on Friday following disappointing results from Microsoft and McDonald's, while General Electric reported revenue that fell short of estimates.

The Dow Jones industrial average fell 66.16 points, or 0.49 percent, to 13,482.78. The Standard & Poor's 500 Index slipped 5.24 points, or 0.36 percent, to 1,452.10. The Nasdaq Composite Index dropped 12.08 points, or 0.39 percent, to 3,060.78.

(Reporting by Leah Schnurr; Editing by Bernadette Baum)