Glut, China worries press oil to 6 1/2-year low

The U.S. oil benchmark flipped between gains and losses Friday after hitting its lowest level in nearly 6 1/2 years on escalating concerns about demand from China following the yuan’s devaluation and continued worries about a global supply glut. 

http://www.marketwatch.com/story/oil-falls-to-fresh-6-year-low-down-x-for-week-2015-08-14