The American Express Story

The setup: a trusted name and a hidden fraud

In the early 1960s, American Express was one of the most trusted names in American finance. It was not a bank in the ordinary sense. It made its money from charge cards that a growing middle class was learning to use, and from traveler's cheques that people carried instead of cash on trips abroad. Both businesses ran on the same asset: trust. People used an American Express card or cheque precisely because the name behind it felt safe.

The company also ran a small, dull-sounding side business: warehousing commodities and certifying what sat in the tanks. That backwater is where the trouble started. A commodities trader named Anthony De Angelis had built an empire on vegetable oil, and he used inventory as collateral to borrow enormous sums. The catch was that much of the oil did not exist. His tanks were filled largely with seawater, with a thin layer of oil floating on top to fool inspectors.

An American Express subsidiary had certified that phantom oil. When the fraud collapsed in November 1963, the lenders who had trusted those certificates came looking for someone to pay, and American Express was on the hook for what could have been a crippling sum. Nobody knew exactly how large the liability would be. The uncertainty alone was enough to send the stock into a slide.

The decision point: panic meets a young investor

The scandal cut American Express stock by roughly half in a matter of weeks. On the surface the fear was reasonable. A financial company runs on confidence, and here was a confidence business facing a scandal, an unknown liability, and headlines about fraud. Many investors did the natural thing and sold, unwilling to hold a stock with an open-ended legal cloud over it. This is the crowd behavior described in fear and greed in investing: a frightening story spreads faster than a careful analysis, and the price falls further than the facts warrant.

Warren Buffett, then in his early thirties and running an investment partnership, looked at the same news and asked a different question. The market was treating the scandal as if it might destroy the company. Buffett wanted to know whether the thing that actually made American Express valuable, its franchise with ordinary customers, had been damaged at all.

So he went and looked. The often-told account has Buffett visiting restaurants, shops, and travel counters in his area, watching whether people still reached for their American Express cards and still bought its traveler's cheques. They did. The scandal was front-page news, but at the counter it changed nothing. Diners paid with the card. Travelers bought the cheques. The franchise was completely intact. The damage was a one-time financial liability, painful but survivable, sitting on top of a business that kept working.

What the American Express story teaches: a wound versus a fatal blow

The whole American Express story turns on one distinction: the difference between a survivable wound and a fatal blow. The market had priced American Express as if the salad-oil liability might be the end of the company. Buffett judged that it was a bad year, not a death sentence, and that judgment made all the difference.

A survivable wound is a one-time cost that hurts the balance sheet but leaves the earning power of the business intact. A fatal blow destroys the reason customers show up. The salad-oil liability was the first kind. American Express would have to write a large check, its equity would take a hit, and the year would look ugly. But once the check was written, it would still have the cards, the cheques, the brand, and the customers, all earning money exactly as before. Understanding which risks are temporary and which are permanent is the core of understanding business risks.

This is where careful analysis beats the headline. Anyone could read that American Express faced a scandal. It took work to establish that the franchise was untouched and the liability was bounded. Buffett did that work, and the work is what turned a scary headline into an obvious opportunity. The price had fallen because of fear; the value had barely moved because the business was fine.

The bet: concentration when the odds are right

Having satisfied himself that the franchise was intact, Buffett did something that looks reckless until you understand his reasoning: he bet big. He put a large share of his partnership's capital into American Express, a position he later described as around 40 percent of the fund. For a manager responsible for other people's money, concentrating that heavily in one stock is extraordinary.

The logic was that a rare, high-confidence opportunity deserves a large commitment. Buffett was not guessing. He had verified that the business worked, established that the damage was survivable, and found the stock available at half price because of temporary fear. When you have done the work and the odds are genuinely lopsided in your favor, spreading your money thinly across many mediocre ideas can be its own mistake. The case for occasionally betting heavily on your best ideas is made in concentrated investing, and American Express is one of its founding examples.

It is worth being clear that this kind of concentration is dangerous in the wrong hands. It works only when paired with the analysis Buffett did first. Betting 40 percent of a fund on a hunch is gambling; betting it on a verified, mispriced franchise is a different act entirely. The size of the bet was justified by the quality of the homework, not by boldness for its own sake.

There is a deeper point about position sizing hidden here, and it runs against conventional advice. The usual counsel is to spread money widely so that no single mistake can hurt you. That is sound for an investor who cannot tell a good opportunity from a bad one. But it has a cost: if you own a hundred stocks, your best idea is diluted to almost nothing, and even a brilliant call barely moves your results. Buffett's view was that when you have done the work and found a genuine mispricing, timidity is its own error. The skill is not in the boldness; it is in knowing when you actually have the edge that justifies it. Amex was such a case, and he sized it accordingly.

The reason he could size it so heavily was the asymmetry of the situation. The downside was bounded: even in a poor outcome, American Express would survive and the loss would be a one-time cost, not a permanent impairment of the business. The upside was large: a recovery to the value the franchise deserved once the fear passed. When the potential loss is limited and the potential gain is several times larger, a big position is not recklessness. It is the rational response to favorable odds, provided the analysis behind it is sound.

What happened, and the luck involved

American Express settled its salad-oil liabilities, the cloud lifted, and the stock recovered strongly over the following years. Buffett's partnership made a large profit, and the episode became one of the case studies that shaped his later philosophy: buy a wonderful franchise when a temporary problem makes it cheap. He would apply the same idea, on a far bigger scale, when he bought Coca-Cola after the 1987 crash.

Honesty requires naming the luck. The salad-oil liability turned out to be large but bounded; had the legal outcome been worse, or had the scandal somehow spread to how customers viewed the brand, the same reasoning would have looked overconfident. Buffett's homework tilted the odds heavily in his favor, but he did not control the settlement or the pace of the recovery. The skill was in the analysis and the sizing. The timing of the payoff was partly fortune.

The company today shows how durable that franchise turned out to be. In July 2026, American Express is worth roughly $243 billion, according to Tenet data, still built on the same core of cards and customer loyalty, more than sixty years after a scandal nearly buried it. As with every track record, past results do not predict future returns; the value of the story is the reasoning, not the outcome.

The reusable principle: panic about a survivable wound is opportunity. When a scare hits a company whose core business keeps working, and you can verify that the damage is temporary and bounded, the crowd's fear can hand you a strong franchise at a discount. The discipline is in the verification. The salad-oil scandal was survivable, and Buffett checked before he acted.

Where to go from here

The American Express story is the template for buying quality during a crisis, and it echoes across Buffett's career. See the same instinct at a larger scale in why Buffett bought Coca-Cola, and the discipline behind big single bets in concentrated investing. To watch for your own version of a survivable scare, keep companies you admire on a Tenet watchlist so a scary headline reads as a possible sale rather than a threat.