NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to 16 classes of the BANK 2017-BNK4 transaction (see ratings list below). BANK 2017-BNK4 is a $1.0 billion CMBS conduit transaction collateralized by 46 commercial mortgage loans secured by 64 properties. The underlying collateral properties are located in 21 states, the District of Columbia, and Puerto Rico, with only two states representing more than 10.0% of the pool: Calif