NEW YORK–(BUSINESS WIRE)–Kroll Bond Rating Agency (KBRA) assigns a rating of ‘BBB- (sf)’ to the Series 2018-GT2 Term Notes from PNMAC GMSR ISSUER TRUST, PennyMac Loan Services, LLC’s (PLS) master trust issuer of notes backed by participation certificates evidencing participation interest in mortgage servicing rights (MSR) on loans underlying Ginnie Mae guaranteed mortgage backed securities. KBRA’s rating on the notes is primarily dependent upon the rating of Private National Mortgage Acceptan