MarketWatch | Oil gives up early gains as US output worries linger MarketWatch Oil futures erased earlier gains Monday, trading lower as worries about rising U.S. production continue to outweigh optimism about prospects for an extended agreement on output cuts by the Organization of the Petroleum Exporting Countries and other ... Oil Falls Sixth Day as U.S. Rig Count Gain Seen Boosting Output Oil investors raise bets on higher prices and lose, thanks to shale boom A Bad Week For Oil |