NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to four classes of FREMF Series 2021-K126 mortgage pass-through certificates and three classes of Freddie-Mac structured pass-through certificates (SPCs), Series K-126. FREMF 2021-K126 is a $1.3 billion CMBS multi-borrower transaction. Freddie Mac will guarantee six classes of certificates issued