American Express' recent peak was on Jan. 23, 2025. At that point the price-to-sales ratio was about 3.5 and the price-to-earnings ratio was roughly 23.2. Alone, those numbers don't mean much, so they need comparison points. The five-year averages for those traditional valuation metrics are 2.5 for the P/S ratio and 18.3 for the P/E.

American Express stock is sliding this year, and the card company’s newest director just bought a large block of shares. It’s the first open-market purchase of stock by an American Express insider in 2025.