S&P Global Ratings assigned its 'AA' long-term rating to the Massachusetts Housing Finance Agency's (MassHousing) main multifamily housing revenue bond resolution (the housing bond resolution). At the same time, S&P Global Ratings affirmed its 'AA' long-term rating to MassHousing's housing revenue bonds, 2017 series A and B. The outlook is stable. The rating action reflects our view of improvement in financial strength and loss coverage of the resolution to extremely strong from very strong. The 'AA' ratings reflect our view of: The extremely strong government support, reflecting ongoing support in the form of low-income housing tax credits, Federal Housing Administration (FHA) risk-share mortgage insurance, federal and state rental subsidies, property tax exemptions, and tax-exempt bond financing; Very strong strategy and