U.S. stocks turned positive on Friday in a volatile session that saw indexes swing sharply between gains and losses.

The Dow Jones industrial average gained 105.28 points, or 0.92 percent, to 11,488.96. The Standard & Poor's 500 Index gained 6.71 points, or 0.56 percent, to 1,206.78. The Nasdaq Composite Index dropped 3.30 points, or 0.13 percent, to 2,553.09.