NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) assigns ratings to fifty-three classes of mortgage pass-through certificates from Sequoia Mortgage Trust 2018-8 (SEMT 2018-8), a prime RMBS transaction. SEMT 2018-7 contains both prime jumbo (78.3%) and high-balance conforming (21.7%) collateral to borrowers with prime attributes. The SEMT 2018-8 mortgage pool is composed of 668 first-lien mortgage loans with an aggregate principal balance of $454,426,513 as of the cut-off date. The und