The world’s top oil exporters are burning through their petrodollar assets at an accelerating pace, increasing the pressure to reach a deal to freeze production to bolster prices. The 18 nations set to gather in Doha on Sunday to discuss a production freeze have spent $315 billion of their foreign-exchange reserves -- about a fifth of their total -- since the oil slump started in November 2014, according to data compiled by Bloomberg. Oxford Economics Director General Gabriel Stein and King Fahd University of Petroleum & Minerals Professor Mohamed Ramady discuss with Anna Edwards on “Countdown.”