Sometimes it seems there is more talk of lenders loosening their credit standards than actual data supporting such a shift, but a new Inside Mortgage Trends analysis of Fannie Mae and Freddie Mac mortgage-backed securities data unearthed some positive signs. In the fourth quarter of 2015, 14.4 percent of purchase mortgages securitized by the two government-sponsored enterprises had credit scores ranging from 620 to 699. Back at the beginning of 2014 ... [Includes two data charts]