Oil Prices Head Lower On U.S. Output Fears By: TalkMarkets November 14, 2017 at 05:35 AM EST Oil prices were lower on Tuesday afternoon as investors feared that continued increases in U.S. output would negate OPEC’s efforts to buoy oil prices. Read More >> Related Stocks: Ultra Bloomberg Crude Oil 2X ETF United States Oil Fund iPath Dow Jones-Goldman Sachs Crude Oil Fund