Brent crude futures tumbled below $60 a barrel after a report showed U.S. crude and fuel inventories ballooning by the most in a generation, feeding fears of a growing oversupply even as trade disputes threaten demand. London-traded futures fell to $59.45, the lowest since January, after the U.S. Energy Information Administration said America’s total petroleum stockpiles grew by about 22 million barrels last week, the biggest jump in data going back to 1990. U.S. drillers also pumped out a record 12.4 million barrels a day. More from Bloomberg.com: Apple Just Announced It's Selling a Mac Mo...