OVERVIEW American Express Credit Account Master Trust's issuances are ABS transactions backed by a pool of receivables generated by American Express credit card accounts and pay-over-time revolving credit features associated with charge card accounts that are owned by American Express National Bank. We assigned our ratings to the class A and B certificates from series 2018-4 and 2018-5. The ratings reflect our view of the transaction's credit support, underlying payment structure and cash flow mechanics, and the legal structure, among other factors. NEW YORK (S&P Global Ratings) May 21, 2018--S&P Global Ratings today assigned its ratings to American Express Credit Account Master Trust's $938.572 million and $622.414 million series 2018-4 and 2018-5 certificates, respectively (see list). The certificate issuances are