NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to nine classes of FREMF Series 2017-K70 mortgage pass-through certificates and five classes of Freddie Mac structured pass-through certificates (SPCs), Series K-070 (see ratings list below). FREMF Series 2017-K70 is a $1.3 billion CMBS multi-borrower transaction. Freddie Mac will guarantee six classes of certificates issued in the underlying Series 2017-K70 securitization and