Wall Street slips on mixed bag of earnings

Of the S&P 500 companies that have reported so far this earnings season, 71.9 percent posted earnings above analyst expectations. McDonald's rose 4.3 percent to $98.97 despite a revenue drop, while Coca-Cola rose 0.9 percent to $41.15 after it reported a rise in revenue for the first time in nine quarters. At 10:25 a.m. EDT the Dow Jones industrial average was down 30 points, or 0.17 percent, at 17,919.59, the S&P 500 was down 2.51 points, or 0.12 percent, at 2,094.78 and the Nasdaq