Mortgage brokers played a somewhat diminished role in jumbo mortgage originations during the third quarter, according to an exclusive Inside Nonconforming Markets analysis and jumbo lender profile. Survey data from Inside Mortgage Finance show that brokers were responsible for just 3.9 percent of jumbo originations in the third quarter, down from 4.5 percent in the previous period. The retail (79.8 percent) and correspondent (16.3 percent) shares were ... [Includes one data chart]