NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to 18 classes of the WFCM 2015-NXS2 transaction (see ratings list below). WFCM 2015-NXS2 is a $914.4 million CMBS conduit transaction collateralized by 63 fixed rate commercial mortgage loans that are secured by 77 properties. The underlying collateral properties are located in 28 states and the District of Columbia, with two states representing more than 10.0% of the pool bal