Wall Street dips at open after data NEW YORK (Reuters) - Stocks opened modestly lower on Wednesday after the latest data on manufacturing came in weaker than expected. The Dow Jones industrial average .DJI was down 39.63 points, or 0.26 percent, at 15,175.62. The Standard & Poor's 500 Index .SPX was down 2.89 points, or 0.18 percent, at 1,647.45. The Nasdaq Composite Index .IXIC was down 5.04 points, or 0.15 percent, at 3,457.57. Reporting by Ryan Vlastelica; Editing by Bernadette Baum