CHICAGO--(BUSINESS WIRE)--Fitch Ratings affirms MMAF Equipment Finance LLC Series 2013-A as follows: --Class A-2 at 'AAAsf'; Outlook Stable; --Class A-3 at 'AAAsf'; Outlook Stable; --Class A-4 at 'AAAsf'; Outlook Stable; --Class A-5 at 'AAAsf'; Outlook Stable. KEY RATING DRIVERS Fitch's analysis of MMAF 2013-A incorporates the derivation of net loss expectations utilizing its proprietary Portfolio Credit Model (PCM) as the collateral pool contains high obligor concentrations, and loss experienc