...SAN FRANCISCO (S&P Global Ratings) July 14, 2017--S&P Global Ratings raised its long-term rating and underlying rating (SPUR) to '##+' from '##' on Massachusetts Housing Finance Agency's (MassHousing, or the agency) single#family housing revenue bonds (SFHRB) outstanding. At the same time, S&P Global Ratings assigned its '##+' long-term rating to MassHousing's SFHRB series 187 (non-AMT [alternative minimum tax] 188 (AMT), and 189 (non-AMT) bonds. The outlook is stable. "The rating action reflects our opinion of consistent strengthening in the indenture's performance and equity position over the past two years, among other factors," said S&P Global Ratings credit analyst Aulii Limtiaco. The stable outlook reflects our opinion of the very strong credit quality of the loan portfolio, which has strengthened as a result of the agency's continued control of write#offs on foreclosed loans, along with the purchase of Fannie Mae mortgage-backed securities (MBS), over the past several years. This...