SunTrust analyst Neal Dingman noted that Whiting Petroleum shares traded down by as much as 50% following an article last night from Debtwire that said the company is holding talks with advisors to review its capital structure and work out a potential "up-tiering exchange." While he is not aware of any imminent credit discussions, he believes the most likely course of action for the company would be to propose a secured debt exchange to address upcoming maturities. He also does not believe last night's Debtwire article had any incremental news, although today's stock and bond declines highlights the continued volatile nature of the energy market, Dingman tells investors. He has a Buy rating on the stock, which is off its earlier lows but remains down by about 21% in afternoon trading.