NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency, Inc. (KBRA) assigns preliminary ratings to 29 classes of mortgage pass-through certificates from J.P. Morgan Mortgage Trust 2015-5 (JPMMT 2015-5), a prime jumbo RMBS transaction. The underlying collateral for JPMMT 2015-5 consists of 506 first-lien, residential mortgage loans with an aggregate principal balance of $489,644,220 as of the cut-off date. The pool is composed entirely of hybrid adjustable-rate mortgages (hybrid ARMs), with initial