Jumbo mortgage-backed securities issued in recent years continue to perform exceptionally well, according to Moody’s Investors Service. The rating service pointed to 10 jumbo MBS issued in 2012 and 2013 by Redwood Trust as having built up credit enhancement on the senior bonds due to a low level of delinquencies. “An analysis of 10 transactions suggests that the low delinquency rate will continue as a result of the improving housing market, even as prepayment rates have remained low ...