The volume and market share of non-agency jumbo mortgage-backed security issuance increased significantly in 2012 compared with other post-crisis years. However, volume remains well below activity seen even before the 2005 boom in non-agency MBS issuance. Some $3.46 billion in non-agency jumbo MBS were issued last year, according to the Inside Mortgage Finance MBS Database, more than four times the volume issued in 2011. Redwood Trust issued six deals last year totaling ... [Includes one data chart]