...S&P Global Ratings revised the outlook to positive from stable on Miami-Dade County's aviation revenue bonds issued for Miami International Airport (MIA) and affirmed the 'A-' long-term rating and underlying rating (SPUR) on the debt. The outlook revision reflects MIA's recent positive enplanement trends that have exceeded S&P Global Ratings' updated activity recovery estimates, with May, June, July, and August 2021 monthly total passengers at approximately 88%, 93%, 98%, and 89% of May-August 2019 levels, sequentially. There is a one-in-three chance we could raise the rating during the outlook period, which typically spans two years, if we believe the current passenger recovery trend and traffic levels are sustainable--supporting an improved market position assessment--and financial metrics remain at least adequate and consistent with a fully residual airport, incorporating enhanced financial flexibility and credit stability provided by $160 million in federal pandemic operating relief...