Warren Buffett's Biggest Mistakes

Warren Buffett is widely regarded as one of the most successful investors of all time. Yet, as Buffett is willing to admit, even the best investors make mistakes. Buffett's legendary annual letters to his Berkshire Hathaway (BRK.A, BRK.B) shareholders tell the tales of his biggest investing mistakes.

There is much to be learned from Buffett's decades of investing experience. Here is an analysis of three of Warren Buffett's biggest mistakes.

Key Takeaways

  • Warren Buffett is widely regarded as one of the most successful investors of all time, but even the best investors make mistakes.
  • Buying at the wrong price, confusing revenue growth with a successful business, and investing in a company without a sustainable advantage are all mistakes the Buffett has shared with his shareholders in his legendary annual letters to them.
  • Among the companies that Buffett names as his biggest investing mistakes, he includes ConocoPhillips, U.S. Air, and Dexter Shoes.
Warren Buffett

Alison Czinkota / Investopedia


Buying at the Wrong Price

In 2008, Buffett bought a large stake in the stock of ConocoPhillips (COP) as a play on future energy prices. However, this turned out to be a bad investment because Buffett bought in at too high of a price, resulting in a multibillion-dollar loss to Berkshire Hathaway. The difference between a great company and a great investment is the price at which you buy stock. This time around, Buffett was even more wrong. Since crude oil prices were well over $100 per barrel at the time, oil company stocks were at high levels, leaving little room for price appreciation from the investment in ConocoPhillips.

Lesson Learned

It's easy to get swept up in the excitement of big rallies and buy-in at prices that you should not have (in retrospect). Investors who control their emotions can perform a more objective analysis. A more detached investor might have recognized that the price of crude oil has always exhibited tremendous volatility and that oil companies have long been subject to boom and bust cycles.

Buffett says: "When investing, pessimism is your friend, euphoria the enemy."

U.S. Air

Confusing Revenue Growth With a Successful Business

Buffett bought preferred stock in U.S. Air in 1989—no doubt attracted by the high revenue growth it had achieved up until that point. The investment quickly turned sour on Buffett, as U.S. Air did not achieve enough revenues to pay the dividends due on the stock. With luck on his side, Buffett was later able to unload his shares at a profit. Despite this good fortune, Buffett realizes that this investment return was guided by lady luck and the burst of optimism for the industry.

Lesson Learned

As Buffett pointed out in his 2007 letter to Berkshire shareholders, sometimes businesses look good in terms of revenue growth, but they require large capital investments all along the way to enable this growth. This is the case with airlines, which generally require additional aircraft to significantly expand revenues. The trouble with these capital-intensive business models is that, by the time they achieve a large base of earnings, they are heavily laden with debt. This can leave little left for shareholders and makes the company highly vulnerable to bankruptcy if business declines.

Buffett says: "Investors have poured money into a bottomless pit, attracted by growth when they should have been repelled by it."

Dexter Shoes

Investing in a Company Without a Sustainable Competitive Advantage

In 1993, Buffett bought a shoe company called Dexter Shoes. Buffett's investment in Dexter Shoes turned into a disaster because he saw a durable competitive advantage in Dexter that quickly disappeared. According to Buffett, "What I had assessed as a durable competitive advantage vanished within a few years." Buffett claims that this investment was the worst he has ever made, resulting in a loss to shareholders of $3.5 billion.

Lesson Learned

Companies can only earn high profits when they have some sort of a sustainable competitive advantage over other firms in their business area. Walmart (WMT) has incredibly low prices. Honda (HMC) has high-quality vehicles. As long as these companies can deliver on these things better than anyone else, they can maintain high profit margins. If not, the high profits attract many competitors that will slowly eat away at the business and take all the profits for themselves.

Buffett says: "A truly great business must have an enduring 'moat' that protects excellent returns on invested capital."

How Does Warren Buffett Select the Best Investments?

Legendary investor Warren Buffett is known for following Benjamin Graham's school of value investing, seeking to invest in securities with a mismatch between their low price and their intrinsic value. Instead of becoming bogged down in the volatility of the stock market, Buffett analyzes potential investments from a more comprehensive perspective, honing in on a company's performance, debt, and profit margins. Buffett generally prefers companies with strong dividends and transparent management teams.

What Are Some Common Investment Mistakes?

As the experience of Warren Buffett suggests, even the most successful investors make some decisions that don't work out as intended and generate losses. Buffett is far from the only investor who has committed the common errors of buying at the wrong price, confusing revenue growth with a successful business, and investing in a company without a sustainable advantage. Although some missteps are inevitable, it is important for investors to learn from their mistakes and adjust their strategies accordingly.

How Does Berkshire Hathaway Operate?

Run by legendary investor Warren Buffett since the 1960s and based in Omaha, Nebraska, Berkshire Hathaway is a holding company that owns a variety of well-known private businesses and also holds minority interests in many other public companies. Insurance subsidiaries such as GEICO make up a large part of the company's portfolio, Berkshire also maintains large positions in household names such as Apple Inc. (AAPL) and The Coca-Cola Company (KO).

The Bottom Line

While making mistakes with money is always painful, paying a few "school fees" now and then doesn't have to be a total loss. If you analyze your mistakes and learn from them, you might very well make the money back eventually. Warren Buffett acknowledges that mistakes will be made along the way. Investors must remember this and use mistakes as an opportunity to learn and make better decisions in the future.

Article Sources
Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.
  1. Berkshire Hathaway Inc. "2008 Letter to Shareholders-Berkshire's Corporate Performance vs. the S&P 500," Pages 5, 16.

  2. Berkshire Hathaway Inc. "2007 Letter to Shareholders-Berkshire's Corporate Performance vs. the S&P 500," Pages 6-9.

  3. U.S. Energy Information Administration. "Cushing, OK WTI Spot Price FOB."

Open a New Bank Account
The offers that appear in this table are from partnerships from which Investopedia receives compensation. This compensation may impact how and where listings appear. Investopedia does not include all offers available in the marketplace.