New york: The main indices on the US Wall Street stock exchange closed mixed at the end of trading today. According to Qatar News Agency, the SandP 500 fell 22.57 points, or 0.30 percent, to close at 7481.28. Meanwhile, the Nasdaq Composite rose 52.52 points, or 0.19 percent, to close at 25868.29. In contrast, the Dow Jones Industrial Average saw a decrease, falling 592.43 points, or 1.12 percent, to settle at 52,332.72.