Secondary market mortgage sales – the lifeblood of mortgage banking income – declined sharply during the first quarter of 2014, according to an Inside Mortgage Trends analysis of bank call reports. Commercial banks and savings institutions sold just $125.7 billion in single-family home loans through their mortgage banking operations during the first three months of this year. That was down 31.1 percent from the fourth quarter and marked the slowest ... [Includes one data chart]