Issuers, investors and even regulators agree that underwriting standards for non-agency mortgage-backed securities will have to loosen for the sector to grow. “We have to start moving down the credit spectrum,” said Sharif Mahdavian, a director and analytical manager of residential MBS at Standard & Poor’s. Speaking at the American Securitization Forum’s ASF 2013 conference last week in Las Vegas, he said non-agency originations could easily move from “shocking prime” to ...