U.S. stocks gain on Yellen comments

Wall Street closed higher on Wednesday trading session as the benchmark stock indexes rose for the third successive day after the U.S. Federal Reserve Chairwoman Janet Yellen signaled that the central bank may keep rates low in short-term. The Standard & Poor's 500 Index added 1.05% to 1,862.31, the Dow Jones industrial average gained 1% to 162.29 points and the Nasdaq Composite Index jumped 1.29% to 4,086.23.