NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to four classes to be issued in the $925.0 million J.P. Morgan Chase Commercial Mortgage Securities Trust 2015-SGP transaction (see ratings list below). JPMCC 2015-SGP is a CMBS single borrower transaction collateralized by a $925.0 million A-1 note that is part of a first lien mortgage loan provided by JPMorgan Chase Bank, National Association. In addition, there is a $50.0 m