Industry participants warn that federal regulators' recently proposed definition for qualified residential mortgages is too stringent and will unnecessarily limit lending to prime jumbo borrowers. If the rule is adopted as proposed, many warn that issuance of non-agency mortgage-backed securities will be limited or non-existent. "While the rules do a good job of addressing and deterring abuses of subprime securitization structures, they are overly and unnecessarily harsh when applied to prime securitization structures," said Martin Hughes, president and CEO of Redwood Trust. Chris Flanagan, a managing director at Bank of America Merrill Lynch, added that...