Wall St slips on mixed bag of earnings

U.S. stocks slipped in choppy trading on Wednesday with traders focusing on earnings, as declines including in Boeing and Chipotle outweighed gains in McDonald's and Coca-Cola. Boeing fell 1.7 percent to $150.77 after reporting revenue that fell short of expectations, while Chipotle fell 7.6 percent to $639.98 a day after it reported the slowest same-restaurant sales growth in five quarters. Of the S&P 500 companies that have reported so far this earnings season, 71.9 percent posted ear