Commercial banks and thrifts reported a hefty increase in profits from their mortgage-banking operations during the second quarter of 2015, according to a new Inside Mortgage Trends analysis of call reports. The industry generated $6.09 billion in mortgage-banking income during the second quarter, a 52.2 percent improvement over the first three months of the year. It was the highest income for the banking industry since the second quarter of 2013, when ... [Includes one data chart]