New York, March 19 -- U.S. stocks closed lower on Tuesday, snapping a two-day winning streak as investors weighed concerns about an economic slowdown ahead of the Federal Reserve's policy meeting.

The Dow Jones Industrial Average dropped 260.32 points, or 0.62 percent, to 41,581.31. The S&P 500 declined 60.45 points, or 1.06 percent, to 5,614.66. The Nasdaq Composite fell 304.54 points, or 1.71 percent, to 17,504.12.

Nine of the 11 primary S&P 500 sectors finished in negative territory, with communication services and consumer discretionary leading the losses, down 2.14 percent and 1.90 percent, respectively.

Energy and health care were the only sectors to gain, rising 0.22 percent and 0.12 percent, respectively.

Uncertainty remains ...