American Express CFO says spending picked up at year-end, thanks to millennials and Gen Z
American Express' affluent cardholders got comfortable spending more freely again late last year, Chief Financial Officer Christophe Le Caillec told CNBC. Spending on AmEx cards jumped 8% year over year in the fourth quarter after slowing down from a 7% growth rate early in the year to 6% in the second and third quarters,