JPMorgan Chase is preparing to issue a $1.02 billion non-agency mortgage-backed security with jumbo mortgages along with loans eligible for sale to the government-sponsored enterprises. JPMorgan Mortgage Trust 2017-2 received preliminary AAA ratings last week from Kroll Bond Rating Agency and Moody’s Investors Service. The deal will be the second-largest non-agency MBS backed by post-crisis originations, topped only by the $1.03 billion security Chase issued in ...