NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) assigns preliminary ratings to 25 classes of mortgage pass-through certificates from J.P. Morgan Mortgage Trust 2017-1 (JPMMT 2017-1), a prime jumbo RMBS transaction. The JPMMT 2017-1 mortgage pool comprises 1,645 first-lien residential loans with an aggregate principal balance of $1,028,862,423 as of the cut-off date. The collateral consists entirely of 30-year fixed rate mortgages (FRMs), all of which are fully amortizing. The pool is
