Five large commercial banks reported a combined 7.1 percent decline in mortgage originations during the third quarter of 2015, accompanied by an even bigger drop in mortgage-banking income, according to an Inside Mortgage Finance analysis of earnings releases. Two of the five – JPMorgan Chase and U.S. Bank – reported slight increases in mortgage production from the second quarter. Given the fairly wide range in origination volume trends among the group, it’s difficult to forecast how the overall market fared based on their activity. At the midway point in 2015, these five banks accounted for 26.8 percent of total first-lien mortgage originations. Wells Fargo remained...[Includes one data table]