The non-agency mortgage-backed securities market got clarity about risk-retention requirements in a new final rule approved this week by six federal regulators. Given current market conditions, it is unlikely to have any impact. The regulators created an exemption big enough to drive a truck through. Sponsors of non-agency MBS backed by qualified residential mortgages are not required to retain a 5 percent interest in the transaction. As expected, the QRM parameters were lined up with ...