MarketWatch | Oil ends mixed, with US prices down as domestic output concerns persist MarketWatch The sharp drop also came on the back of recent data, including a 13th consecutive weekly rise in U.S. rigs drilling for oil and a forecast for higher domestic shale output in May, that imply the U.S. will continue to add to global supplies even as OPEC ... Crude Oil Is A Tough Sell Oil could be a big factor Thursday after slump Oil's slide towards $50 a barrel slows |