AUSTIN, Texas--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'AAA' rating on the following Michigan Finance Authority (MFA) state revolving fund (SRF) bonds: --Approximately $1.16 billion in outstanding clean water and drinking water revolving fund (senior lien) revenue bonds. --Approximately $385 million in outstanding clean water and drinking water revolving fund subordinate revenue bonds. The Rating Outlook is Stable. SECURITY Bonds are secured primarily by pledged loan repayments and, for