Wells Fargo problem loans jump 62 percent, driven by energy

``Wells Fargo & Co (WFC.N) racked up a 62 percent increase in potentially problematic loans, mainly to oil and gas companies, according to its first-quarter regulatory financial filing released on Wednesday. Loans regulators define as "criticized" rose to nearly $30 billion as of March 31 from about $18.5 billion at the end of 2015, the filing said. The remaining $290.5 billion of Wells Fargo's commercial and industrial loan portfolio was classified as "pass."''