Traders work at the New York Stock Exchange in New York, the United States, on Oct. 11, 2018. U.S. stocks extended deep losses in volatile trading on Thursday. The Dow Jones Industrial Average fell 545.91 points, or 2.13 percent, to 25,052.83. The S&P 500 was down 57.31 points, or 2.06 percent, to 2,728.37. The Nasdaq Composite Index was down 92.99 points, or 1.25 percent, to 7,329.06. (Xinhua/Wang Ying)