NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) assigns preliminary ratings to two classes of Diamond Resorts Owner Trust 2015-1 (“DROT 2015-1”), a timeshare ABS transaction. DROT 2015-1 is collateralized by approximately $177.1 million of timeshare loan receivables as of June 30, 2015. The preliminary ratings reflect the initial credit enhancement levels of 11.50% for the Class A notes and 5% for the Class B notes. Credit enhancement consists of overcollateralization, a cash reserve