US STOCKS-Wall Street drops after China cancels trip to Montana farmland By: Reuters: Company News September 20, 2019 at 16:22 PM EDT * Indexes end: Dow -0.59%, S&P 500 -0.49%, Nasdaq -0.80% (New throughout, updates prices, market activity and comments to close) Read More >> Related Stocks: Apple Merck & Co Roku Inc Walt Disney Xilinx