“Losses are spreading from bondholders to banks amid the worst oil crash in a generation. Wells Fargo & Co., Citigroup Inc.and JPMorgan Chase & Co. have set aside more than $2 billion combined to cover souring energy loans and will add to that safety net if prices remain low, the companies reported this week. Losses are mounting as more oil and natural gas producers default on debt payments and declare bankruptcy. Wells Fargo lost $118 million on its energy portfolio in the fourth quarter and Citigroup lost $75 million.”