As issuance of non-agency jumbo mortgage-backed securities has increased in recent quarters and conforming jumbo MBS issuance has remained relatively flat, the non-agency sector has started to account for a larger share of jumbo mortgage securitization. A total of $15.07 billion in jumbo MBS – mortgages with balances above the traditional conforming loan limit of $417,000 – was issued in the second quarter of 2013, according to the Inside Mortgage Finance MBS Database ... [Includes one data chart]