Oil slips further below $60 on recession concerns, U.S. supply

LONDON (Reuters) - Oil slipped further below $60 a barrel on Thursday, extending the previous session's 3% drop, pressured by mounting recession concerns and a surprise boost in U.S. crude inventories.In a sign of investor concern that the world's biggest economy could be heading for recession, weighing on oil demand, the U.S. Treasury bond yield curve inverted on Wednesday for the first time since 2007.Brent crude was down 20 cents at $59.28 a barrel by 0840 GMT, after a 3% slide on Wednesday...