NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to ten classes of FREMF Series 2018-K731 mortgage pass-through certificates and six classes of Freddie Mac structured pass-through certificates (SPCs), Series K-0731 (see ratings list below). FREMF Series 2018-K731 is a $1.2 billion CMBS multi-borrower transaction. Freddie Mac will guarantee six classes of certificates issued in the underlying Series 2018-K731 securitization a