CNBC | Oil under $40 barrel on OPEC production, could hit $20s in 2016 CNBC As crude oil prices continue their dramatic decline after a refusal by the Organization of Petroleum Exporting Countries (OPEC) to cut production, the key question now is, how much lower can oil go? U.S. WTI crude oil futures traded under $40 a barrel ... Oil price slides after Opec fails to agree production cuts – business live Oil falls towards 2015 low on OPEC inaction, strong dollar OPEC incapable of behaving like a cartel as oil price continues to plunge |