CNBC | US oil stumbles below $30 a barrel CNBC Crude oil prices lost more than 4 percent on Tuesday, extending a relentless selloff to trade below $30 a barrel for the first time since December 2003 on concerns about fragile Chinese demand and the absence of restraint in global production. Shaking ... Oil: The Slide Continued in 2015 Banks Slash Oil-Price Forecasts Again The bull and bear case for crude oil |