S&P Global Ratings assigned its 'AA+' long-term rating to the Massachusetts Housing Finance Agency's (MassHousing, or the agency) single-family housing revenue bonds (SFHRBs), series 221 (non-AMT; social bonds). At the same time, we affirmed our 'AA+' long-term rating and underlying rating (SPUR) and our 'AA+/A-1+' dual rating on MassHousing's SFHRBs outstanding. The outlook is stable. MassHousing will use the series 221 proceeds, with principal amounts totaling approximately $71.3 million, to replace and refund certain bonds outstanding, and to finance new mortgage loans under the program either through the purchase of mortgage-backed securities (MBS) or direct purchase of whole mortgage loans. The series 221 bonds will be issued in fixed-rate mode, and are partly subject to optional and special redemption as