U.S. stocks turned negative in a volatile session on Tuesday, weighed down by technology, energy and industrial shares.

The Dow Jones industrial average dropped 31.26 points, or 0.31 percent, to 9,978.47. The Standard & Poor's 500 Index dropped 3.66 points, or 0.35 percent, to 1,045.26. The Nasdaq Composite Index dropped 12.52 points, or 0.59 percent, to 2,107.45.

(Reporting by Edward Krudy; Editing by Kenneth Barry)