...S&P Global Ratings assigned its '##+/A-1' dual rating to the Massachusetts Housing Finance Agency's (MassHousing, or the agency) single-family housing revenue bonds (SFHRBs), series 196 and 200. The outlook is stable. MassHousing anticipates remarketing the series 196 and 200 bonds on or around May 27, 2021, and converting both series' interest rate mode to weekly from index-floating, and adding liquidity enhancement in the form of a standby bond purchase agreement (SBPA) for each series from UBS AG, acting through its Stamford Branch. MassHousing's SFHRB resolution is the agency's main resolution for its single-family mortgage program and was adopted in 1985. Approximately $7.8 billion has been issued under the resolution, with $1.1 billion in bonds outstanding as of Dec. 31, 2020. Prior to 2009, MassHousing used bond proceeds issued under the resolution to purchase all whole loans. Since the housing and credit crisis in 2008 to 2009, however, MassHousing has used bond proceeds to purchase...