Is This Warren Buffett's Favorite Stock? (Hint: It's Not Apple)

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Apple is well known as Warren Buffett's largest investment at Berkshire Hathaway. It has netted shareholders over $100 billion in gains, making it one of the most successful investments ever.

However, did you know that Buffett has greatly trimmed this position? That's right -- Berkshire Hathaway has been selling Apple shares throughout 2024, likely due to the stock's rising valuation. Clearly losing his optimism about the future returns of Apple stock, Buffett is adding a ton of cash to Berkshire Hathaway's balance sheet, which now numbers over $300 billion.

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There is one stock he has never sold since buying in 1991, though: American Express (NYSE: AXP). Buffett owns over 20% of the credit card issuer and bank, making it the second-largest position in the Berkshire Hathaway portfolio. The position trades at a value of $40 billion as of this writing.

Let's see why Buffett is attracted to American Express stock, why he has never sold a share, and whether you should join him and buy shares today.

A durable consumer financing institution

Buffett has been following American Express ever since he first bought shares in 1963. Back then it was a radically different company, dealing in traveler's checks. By 1991, the company had become one of the largest credit card networks in the United States, focusing on serving a premium customer base.

There are a few durable qualities to American Express' business model. It sells high-fee credit cards such as the Platinum card, which debuted in 1984. People sign up for these cards because of the travel benefits and premium perks such as access to airport lounges. However, they also come with an intangible brand benefit built up over the last few decades. Customers feel like they are in an exclusive club shopping with the metallic American Express cards, which gives the company a brand value that is tough to replicate.

On the back end, the American Express infrastructure is hard to replicate. Like Visa and Mastercard, American Express has been entrenched as a payment method for merchants for decades. If another credit card network were to try to compete, it would have to go to virtually every merchant across the country to try to convince them to add another credit card to its payment terminal. This is an uphill battle that insulates American Express from the competition.

Buffett likely saw these qualities in 1991 when he bought American Express for Berkshire Hathaway. Since then, American Express stock has posted a cumulative total return of 10,130%. Even though Buffett has only purchased more shares a few other times since 1991, the stock has compounded at such a high rate that it now makes up a large portion of his equity portfolio.