JPMorgan Chase is preparing to issue a $302.27 million jumbo mortgage-backed security where non-qualified mortgages will account for 20.2 percent of the loan balance, according to presale reports. All of the mortgages in the planned JPMorgan Mortgage Trust 2016-2 were originated by First Republic Bank via the retail channel. Most prime MBS issued since QM standards took effect in 2014 have been backed solely by QMs and the few deals that have included non-QMs tend ...