Nearly a quarter (24 percent) of all purchase loans funded by Fannie Mae and Freddie Mac have a debt-to-income ratio greater than the qualified mortgage limit of 43 percent, according to the February 2014 National Mortgage Risk Index released by the conservative American Enterprise Institute’s International Center on Housing Risk. Researchers found no discernible impact on the purchase loan market from the CFPB’s QM regulation.“In February, half of agency loans had a down payment of 5 percent or less, nearly one-in-four agency loans had a DTI ratio greater than 43 percent, and one-in-eight agency loans had a FICO score of less than 660,” the AEI said.