NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) is pleased to announce the assignment of preliminary ratings to seven classes of Olympic Tower 2017-OT, a $480.0 million CMBS single borrower transaction (see ratings list below). The collateral for the securitization consists of a $480.0 million portion of a $760.0 million single, non-recourse, first lien, fixed-rate mortgage loan that is secured by the borrower’s leasehold interest in a 525,372 sf, mixed-use retail and office condomin