Wall Street's main stock indices closed higher at the end of today's trading. The Dow Jones industrial ended the session up 47.11 points, or 0.17%, to 27,184.15 points.The Standard & Poor's 500 Index added 8,64 points, or 0.29 percent, to 3,009.57 points.The Nasdaq Composite Index for Technology Shares rose 24.79 points, or 0.3 percent, to 8,194.47.