US crude closes under $40 a barrel for first time in 6 1/2 years on fears of new global slump By: Stockhouse Newswire August 25, 2015 at 10:39 AM EDT US crude closes under $40 a barrel for first time in 6 1/2 years on fears of new global slump Read More >> Related Stocks: Occidental Petroleum iPath Dow Jones-Goldman Sachs Crude Oil Fund