The non-agency jumbo mortgage-backed security market expanded significantly in the first quarter of 2013, with more new issuance than was produced in all of last year, according to the Inside Mortgage Finance MBS Database. Issuance showed no signs of slowing down entering the second quarter, led by Redwood Trust. Some $3.95 billion in non-agency jumbo MBS was issued in the first quarter, compared with $3.46 billion in issuance in all of last year. The last time non-agency ... [Includes one data chart]