American Express vs. S&P Global: Which Financial Stock Is a Better Buy for 2027?

Amidst the evolving landscape of digital payments, investors are weighing the merits of American Express (AXP) versus Mastercard (MA) as potential investments for 2027. Both companies have distinct business models and performance metrics that should influence the decision.

American Express operates as both a lender and a network, specializing in high-spending cardholders and premium partnerships. Its unique closed-loop network allows it to act as both the card issuer and payment processor for its premium customer base. This gives the company deep insights into spending patterns and relationships with millions of merchants globally.

In the latest fiscal year, American Express reported a revenue of nearly $72.2 billion, showcasing a 9.5% growth compared to the previous year. The net income was around $10.8 billion. The company's balance sheet shows a debt-to-equity ratio of about 1.7x, suggesting that total debt is nearly 1.7 times shareholder equity. The current ratio is approximately 0.3x, indicating that current assets are less than current liabilities.

Moreover, American Express generated free cash flow of nearly $16.0 billion in the latest fiscal year.

On the other hand, Mastercard functions as a pure-play payment technology provider, facilitating transactions without taking on credit risk. It serves more than 3.7 billion accounts globally and operates in the broader fintech landscape, providing critical infrastructure for digital payments. In the latest fiscal year, Mastercard generated revenue of nearly $32.8 billion, reflecting a 16.4% growth over the prior year.

The net income was close to $15.0 billion, with a high net margin of approximately 45.6%. The company's balance sheet shows a debt-to-equity ratio of about 2.5x and a current ratio of roughly 1.0x. Mastercard also produced nearly $16.4 billion in free cash flow during its latest fiscal year.

When comparing the two, American Express trades at a lower Forward P/E than Mastercard, suggesting it is currently priced at a smaller multiple of its future earnings estimates. However, Mastercard's business model offers a structural edge, as it sells access to a network where each added transaction costs almost nothing, and growth directly translates to profit. Unlike American Express, Mastercard does not lend, thus avoiding the associated risks of funding loan books or holding capital against one customer base.

For a long-term investor, Mastercard presents a compelling case due to its focus on spending exposure and its ability to generate profits without the credit risk inherent in American Express's operations. However, American Express's closed-loop network and relationship with affluent customers provide a unique advantage, contributing to steady fee and spending growth. Ultimately, the choice between the two may depend on the investor's preference for price versus durability and their existing portfolio composition.