RT | Oil price plunges after 'No' vote in Greece, impending Iran deal RT Oil prices fell 7 percent on Monday in the worst single-day decline in three months after Greece's Sunday bailout referendum. Meanwhile, fears of oversupply have taken hold as Iran and world powers approach a nuclear deal. The US benchmark oil price ... Oil Gets The Summertime Blues Oil Prices Tumble Nearly 8% Oil crashes 8 percent as Greek vote, Iran talks set off exodus |