CNNMoney | Oil prices dive below $54 as Iran deal looms CNNMoney For now all eyes are on Iran, which has the fourth biggest oil reserves in the world. A big part of the nuclear deal is that the West will lift sanctions on Iran, allowing it to increase its oil exports. That could be a game changer by deepening the ... Oil tumbles 6 percent after Greek 'No' vote, ahead of Iran deadline Oil falls more than 3 percent after Greek 'No' | Reuters |