Traders work at the New York Stock Exchange in New York, the United States, Feb. 6, 2018. U.S. stocks closed higher after a volatile trading session on Tuesday. The Dow Jones Industrial Average added 567.02 points, or 2.33 percent, to 24,912.77. The S&P 500 increased 46.20 points, or 1.74 percent, to 2,695.14. The Nasdaq Composite Index was up 148.36 points, or 2.13 percent, to 7,115.88. (Xinhua/Wang Ying)