The nation’s megabanks reported fairly strong mortgage earnings during the second quarter thanks to a jump in new originations, robust servicing revenue and expense cuts. If the results reported by Wells Fargo, JPMorgan Chase, Bank of America and Citigroup are any indication, the industry may be rebounding from a rough stretch in late 2013 and early 2014. But the first quarter of this year was so bad – and originations so weak – that lenders had no place to go but up. Larry Charbonneau, a warehouse lending analyst, said...