NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned the following ratings and Rating Outlooks to Morgan Stanley Bank of America Merrill Lynch Trust (MSBAM) 2015-C23 commercial mortgage pass-through certificates: --$45,800,000 class A-1 'AAAsf'; Outlook Stable; --$122,100,000 class A-2 'AAAsf'; Outlook Stable; --$67,600,000 class A-SB 'AAAsf'; Outlook Stable; --$230,000,000 class A-3 'AAAsf'; Outlook Stable; --$285,394,000 class A-4 'AAAsf'; Outlook Stable; --$750,894,000b class X-A 'AAAsf'; O