U.S. Bank and State Street Bank and Trust both have an 'Aa2' long-term rating, putting them five notches away; both have negative outlooks, though neither is under review. Bank of New York Mellon, another big player in this market niche, is under review for a possible downgrade but is currently rated Aaa, giving it a much wider margin than some of its competitors. Moody's isn't the only ratings agency that has downgraded the credit ratings of a number of major financial institutions while maintaining their negative outlooks. Standa rd & Poor's currently has a long-term rating on Citi of 'A-', with a negative outlook. The rating agency has Deutsche, Wells and Bank of New York Mellon's long-term rating at 'A+' and State Street's at 'AA-'; all of these banks have negative outlooks as well.