SAN FRANCISCO (S&P Global Ratings) May 4, 2020--S&P Global Ratings placed the following ratings on the Metropolitan Transportation Authority (MTA), N.Y., on CreditWatch with negative implications: 'A-' issuer credit rating (ICR) on the MTA 'a-' stand-alone credit profile (SACP) on the MTA 'A-' long-term rating and underlying rating (SPUR) on the MTA's previously issued transportation revenue bonds (TRBs) 'AA/A-1+' dual rating on the MTA's series 2012G-2 and 2002G-1G variable-rate TRBs, with enhancement by letters of credit from Toronto Dominion Bank, and on the MTA's series 2015E-1 variable-rate TRBs, with enhancement by a letter of credit from U.S. Bank N.A. 'AA/A-1' dual rating on the MTA's series 2005E-2 and 2015E-3 variable-rate TRBs, with enhancement by letters of credit from Bank of