Publicly traded banks reported strong gains in mortgage-banking income during the third quarter, according to a new Inside Mortgage Trends analysis of earnings releases. A diverse group of 26 banks that includes all the top lender-servicers and a number of regional players reported a combined $3.853 billion in mortgage-banking profits for the third quarter of 2016. That was up 23.5 percent from the previous period, and it was the strongest quarterly showing ... [Includes one data chart]