Performance continued to deteriorate last month across a broad spectrum of mortgages securitized in the non-agency MBS markets in recent years, according to Standard & Poor’s. The overall delinquency rate on prime jumbo MBS issued in 2005, 2006 and 2007 rose to 7.90 percent, 10.93 percent and 10.65 percent in May, the rating service reported this week. Those figures were up roughly...