...S&P Global Ratings assigned its '##+/A-1' rating and stable outlook to Massachusetts Housing Finance Agency's (MassHousing) roughly $10 million series 204 single-family housing revenue bonds (SFHRBs) and affirmed its various ratings, with a stable outlook, on the agency's existing SFHRB debt. MassHousing expects to remarket series 204 bonds on or around Oct. 28, 2021. It plans to convert the series 204 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 single-family program's main resolution, adopted in 1985. MassHousing has issued approximately $7.8 billion under the resolution with $1.05 billion in bonds outstanding as of March 31, 2021. Prior to 2009, MassHousing used resolution bond proceeds to purchase all whole loans outstanding. Since the housing and credit crisis of 2008-2009, however, MassHousing...