Commercial banks and savings institutions reported a sharp decline in mortgage-banking income during the first quarter of 2016, according to a new analysis of call-report data by Inside Mortgage Trends. In aggregate, banks earned $3.31 billion on mortgage banking during the first quarter. That was down 26.8 percent from the previous period and it marked the lowest quarterly profit in nearly five years. Back in the second quarter of 2011 ... [Includes one data chart]