S&P Global Ratings assigned its 'AA+' rating to Massachusetts Housing Finance Agency 's (MassHousing) approximately $6.1 million series 252, $136 million series 253, and $27.8 million series 254 single-family housing revenue bonds (SFHRBs). At the same time, S&P Global Ratings affirmed its 'AA+' long-term rating and 'AA+/A-1' and 'AA+/A-1+' dual ratings on MassHousing's previously issued debt within the agency's SFHRB program. The outlook is stable. Bonds issued within the SFHRB program are special obligations of MassHousing, secured solely by certain revenue and funds established under this program for security and payment. These bonds are on parity with all other obligations under this program. The dual ratings reflect the long-term rating on previously issued debt and our view of liquidity support