CHICAGO (S&P Global Ratings) April 13, 2021--S&P Global Ratings raised its underlying rating to 'A' from 'A-' on the Metropolitan School District of New Durham Township (MSDNDT), Ind.'s existing tax-backed debt. At the same time, S&P Global Ratings assigned its 'AA+' long-term rating and 'A' underlying rating to Metropolitan School District of New Durham Township School Building Corp. (school corporation)'s $2.5 million series 2021 ad valorem property tax first mortgage bonds. S&P Global Ratings also affirmed its 'AA+' long-term rating on the school corporation's existing tax-backed debt. The outlook on all ratings is stable. "The upgrade is driven by MSDNDT's consistent positive general fund operations--with surpluses in the past seven fiscal years--and very strong cash reserves," said S&P Global Ratings