Mortgage-banking activity slowed significantly at commercial banks and savings institutions in the first quarter, according to a new Inside Mortgage Trends analysis. Banks reported a total of $71.99 billion in retail 1-4 family originations in their mortgage-banking operations during the first three months of 2017, down 40.1 percent from the fourth quarter of last year. Loan sales volume also fell off sharply, dropping 29.1 percent to $163.75 billion during ... [Includes one data chart]