CHICAGO (S&P Global Ratings) Sept. 9, 2021--S&P Global Ratings revised its outlook to stable from negative and affirmed its 'AA' rating on Regional Transportation Authority (RTA), Ill.'s existing general obligation (GO) bonds. At the same time, S&P Global Ratings assigned its 'AA' rating to RTA's anticipated $95 million series 2021A taxable GO refunding bonds. "The outlook revision to stable reflects our view of RTA's stabilizing underlying creditworthiness, supported by its resilient pledged revenue performance," said S&P Global Ratings credit analyst Helen Samuelson. "Additionally, we note the recent infusion of federal stimulus grant dollars bolstered RTA's liquidity position and provides important financial flexibility for the next 24-36 months as its service boards adjust to changes in ridership," Ms. Samuelson added. The