The volume of non-agency MBS issued during the first quarter of 2010 fell slightly from the end of last year, but the market saw its first Alt A transaction in nearly two years, and a new jumbo deal is said to be in the works. A total of $15.59 billion of non-agency MBS were issued in the first three months of the year, a 1.6 percent decline from the previous quarter... [Includes four charts]