NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) assigns preliminary ratings to 29 classes of mortgage notes from OBX 2018-EXP1 Trust (OBX 2018-EXP1). OBX 2018-EXP1 Trust is the first residential mortgage-backed securities (RMBS) 2.0 transaction issued by the Seller Onslow Bay Financial LLC, (Onslow Bay) which includes a significant concentration of collateral that KBRA considers to be “expanded prime”. The collateral pool contains both qualified mortgages (QM) and Non-qualified mortg