"American Express had tremendous success at winning over lots of younger customers, who will likely stick with the company for decades to come," he said.
American Express saw its stock slip last week after reporting a slight revenue miss and trimming its full-year forecast for the metric.
To Cramer, Wall Street isn't paying enough attention to American Express's earnings strength.
"If you believe the big story, then, like me, you know that this regularly quarterly pullback is your chance to buy American Express hand over fist," Cramer said.
American Express did not immediately respond to a request for comment.
Persons:
CNBC's Jim Cramer, wasn't, Monday's, Cramer, cardholders, Gen, Christophe Le Caillec
Organizations:
American Express, Express, Federal Reserve