New issuance of home-equity loan MBS cooled off a bit in the first quarter of 2006, but a growing supply of second-lien products helped sustain the market at historically high levels, according to the Inside Mortgage Finance MBS Database. A total of $139.78 billion of home-equity securities were issued in the first three months of the year, down 8 percent from the record $152.41 billion generated during the fourth quarter of 2005. In fact, the… [One data table included]