NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to five classes of FREMF 2015-K46 mortgage pass-through certificates and three classes of Freddie Mac structured pass-through certificates (SPCs), Series K-046, a $1.59 billion CMBS multi-borrower transaction (see our ratings listed below). The transaction is collateralized by 82 fixed-rate multifamily mortgage loans. The loans have principal balances that range from $1.7 mill