S&P Global Ratings assigned its 'AA' long-term rating to Austin, Texas' parity electric utility system series 2020A revenue refunding and improvement bonds and series 2020B taxable revenue refunding bonds. At the same time, S&P Global Ratings affirmed its 'AA' underlying rating (SPUR) on the city's parity electric system (d/b/a Austin Energy) revenue debt. The outlook is stable. A pledge of the electric system's net revenues secures the system's series 2020A and 2020B revenue bonds. These bonds are subordinate to prior subordinate-lien combined utility system bonds (which water, sewer, and electric system revenues secure). The prior subordinate-lien bonds are closed to new issuance. As of Sept. 30, 2020, $78 million in prior subordinate-lien bonds were outstanding and all prior first-lien obligations