Having a busy correspondent program helped many of the top agency mortgage sellers cultivate purchase-mortgage business in 2014, according to a new Inside Mortgage Trends analysis of loan-level data on loans securitized by Fannie Mae, Freddie Mac and Ginnie Mae. Mortgages originated by loan correspondents accounted for 35.3 percent of single-family loans securitized by the agencies last year. Retail originations were the ... [Includes two data charts]