Reuters | Oil prices on track for greatest yearly percentage gain since 2009 Reuters Singapore Oil prices are on track for their biggest annual percentage gain since 2009 on the back of an agreement struck between OPEC and non-OPEC countries to cut crude production output. U.S. benchmark West Texas intermediate (WTI) CLc1 crude ... US oil settles at $53.77, down 29 cents, after surprise increase in crude inventories Oil Prices Inch Lower After US Stockpile Data Oil breaks 4-day win streak as US inventories rise |