Issuers of jumbo mortgage-backed securities offered investors variety in two deals that closed last week and an MBS planned for next week. Separate jumbo MBS from WinWater Home Mortgage and FirstKey Mortgage were issued on Feb. 27. The $372.36 million WinWater Mortgage Loan Trust 2015-2 included two non-qualified-mortgages. Debt-to-income ratios above 43 percent caused the two loans to be deemed non-QMs, according to Standard & Poor’s ...