Reuters | Oil faces big monthly loss as oversupply bites Reuters LONDON Oil prices fell to their lowest levels since April on Friday, with on Brent track for its biggest monthly loss since December 2015, pressured by slowing economic growth that threatened to increase a supply overhang of crude and refined products. Oil in bear market territory: 5 things to watch US oil settles down 78 cents, or 1.86 pct, at $41.14 a barrel Natural-gas prices jump 8%; oil logs 6th straight session loss |