American Express delivered a standout fourth quarter, reporting 10% year-over-year revenue growth and a 13% increase in net income. The company attributed gains to rising card member spending and expanding merchant acceptance, with total billed business climbing by double digits across consumer and commercial segments. Cost discipline remained a priority, as the efficiency ratio narrowed compared with the same period a year earlier, supporting margin expansion despite elevated marketing investments.

AXP’s franchise benefits from powerful network effects and brand strength, underscored by 153 million active card accounts and acceptance at approximately 160 million merchant locations worldwide. The spend-centric model drives a balanced revenue mix: roughly half of total revenues derive from merchant discount fees, while membership and cardholder fees account for 26%. This diversification insulates Amex from credit losses and interest rate volatility, as fee income cushions against shifts in lending spreads.

The shares currently trade at a price-to-earnings ratio of 22.9, near the highest multiple seen over the past three years. While historical returns have outpaced the overall market by a wide margin—delivering consistent mid- to high-teens annualized total returns—the stretched valuation suggests limited upside from current levels unless growth accelerates beyond long-term consensus forecasts. Investors will be watching guidance for 2026 spending trends and fee income growth to assess whether the premium multiple is justified.