The main stock indices on the Wall closed sharply higher at the end of trading today.The S and P 500 index ended trading up 56.42 points, or 1.03 percent, to close at 5,551.94 points. The Nasdaq Composite Index rose 365.06 points, or 2.14 percent, to reach 17,390.94 points, while the Dow Jones Industrial Average rose 101.43 points, or 0.25 percent, to close at 40,838.39 points.Source: Qatar News Agency