American Express' new credit card strategy is paying off, according to a study conducted by Brittain Associates Inc. of Atlanta.

The study focused on the Optima True Grace card, American Express' first credit card since it introduced the original Optima card in 1987.

Limited Time Offer

Save $400 off your subscription. Special offer ends April 30, 2017.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.