S&P Global Ratings raised its rating to 'BBB' from 'BBB-' on the California School Finance Authority's series 2019 and 2021 charter school revenue bonds issued for Granada Hills Charter Obligated Group (GHC). The outlook is stable. The upgrade reflects GHC's improved financial profile following a very healthy operating surplus in fiscal 2021, which translated to strong maximum annual debt service (MADS) coverage and solid growth in unrestricted reserves and liquidity. GHC had $61.8 million in long-term debt outstanding as of June 30, 2021, consisting of the series 2019 and series 2021 bonds. Approximately $8.8 million of the series 2021 bonds were used for capital improvements at the Devonshire campus, while the remaining portion were used to refinance the school's previously