Investors in MBS deals backed by most types of home-equity loans got some good news in the early part of 2005 as delinquencies trended downward. The falloff was captured by a number of different indexes. Moody’s Investors Service, for instance, reported that the 60+-day delinquency rate on loans in its home-equity index fell 21 percent on a year-to-year basis – to 5.19 percent – in March. That marked the lowest delinquency rate in eight…