Mortgage brokers played an increasingly important role in the conventional conforming market during the first quarter of 2015, according to a new Inside Mortgage Trends analysis of mortgage-backed securities issued by Fannie Mae and Freddie Mac. Mortgage brokers were responsible for $23.8 billion of single-family mortgages securitized by the two government-sponsored enterprises during the first three months of this year. That was up 16.0 percent ... [Includes two data charts]