Dow Falls Sharply, Nasdaq Sinks as Wall Street Weighs Trump's New Trade Threats

``The Dow Jones Industrial Average  tumbled 384 points, or 1.56%, to 24,195, the S&P 500  was down 1.6% and the Nasdaq  fell 2.46% after a report said Trump planned to bar many Chinese companies from investing in U.S. technology firms, and by blocking additional technology exports to Beijing.''