CNBC | Oil prices fall 4% on China data, OPEC uncertainty CNBC Oil fell more than 4 percent on Monday as weak economic data from China, the world's largest energy consumer, weighed on prices and an OPEC source played down talk of an emergency meeting to stem the decline. China's manufacturing sector contracted ... Oil falls 4 percent on China data, fading prospect of OPEC action MarketsHedge funds cut back on short oil positions Oil Bulls Jump in at Fastest Pace in Five Years on Rebound Hopes |