Description:U.S. stocks edged lower at the open on Wednesday (January 30) following an unexpected contraction in fourth-quarter economic activity, but losses were curbed by gains in Internet retailer Amazon.com. The Dow Jones industrial average dropped 11.13 points, or 0.08 percent, to 13,943.29. The Standard & Poor's 500 Index shed 1.34 points, or 0.09 percent, to 1,506.50. The Nasdaq Composite Index gained 1.48 points, or 0.05 percent, to 3,155.14. U.S. gross domestic product fell 0.1 percent, far below(1:03)