The main indices on Wall Street closed on a mixed note at the end of Monday's trading session. The S and P 500 index rose by 4.5 points, or 0.08 percent, to reach 5,463.6 points. The Nasdaq Composite index gained 12.32 points, or 0.07 percent, to settle at 17,370.20 points. Conversely, the Dow Jones Industrial Average fell by 49.21 points, or 0.12 percent, closing at 40,540.13 points. Source: Qatar News Agency