US STOCKS-U.S. stocks fall as energy, material stocks weigh By: Reuters: Company News August 19, 2015 at 10:01 AM EDT * Indexes down: Dow 0.73 pct, S&P 0.81 pct, Nasdaq 0.79 pct (Updates to open) Read More >> Related Stocks: Chevron Corp ConocoPhillips Exxon Mobil