Stocks fell sharply on Friday, wiping-out the Dow Jones Industrial Average's gain for January, as investors grew increasingly worried about the potential economic-impact of China's fast-spreading coronavirus. The Dow dropped 603.41 points, or 2.1%, to 28,256.03 in the 30-stock average's worst day since August. The S&P 500 had its worst day since October, falling 1.8% to 3,225.52. The Nasdaq Composite dropped 1.6% to 9,150.94.