Mortgage lenders that sell single-family loans into Fannie Mae and Freddie Mac mortgage-backed securities continued to stretch the credit envelope during the third quarter, a new Inside Mortgage Trends analysis reveals. But the increase in the share of higher-risk lending is still going at a glacial pace, and low-risk mortgages continue to dominate the government-sponsored enterprises’ business. During the third quarter, mortgages in the lowest ... [Includes two data charts]