An affiliate of Galton Funding is preparing to issue a jumbo mortgage-backed security with looser underwriting standards than the super-prime deals that have dominated the jumbo market since the financial crisis. DBRS and Moody’s Investors Service assigned AAA ratings to the planned $254.55 million Galton Funding Mortgage Trust 2017-1. The senior tranche of the MBS will include credit enhancement of 13.50 percent, which is much higher than the 5.00 percent credit enhancement ...