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Advanced · updated September 2026 · ~7 min read

The Dot-Com Bubble: When the Internet Broke the Market

In the late 1990s, adding '.com' to a company name could send its stock soaring, even if the business had never made a dollar of profit. Then, in the spring of 2000, the whole thing came apart.

What happened

The tech-heavy Nasdaq Composite index peaked at 5,048 on March 10, 2000. Over the next two and a half years it collapsed. By October 2002 it had fallen roughly 78%, to around 1,140. More than $5 trillion in market value evaporated, and a long list of once-celebrated internet companies went bankrupt entirely.

Names that had been advertised during the Super Bowl, like Pets.com, eToys and Webvan, simply ceased to exist. Fortunes built on paper vanished, and a generation of investors learned a painful lesson about the difference between a good story and a good business.

Why it happened

The internet was real and genuinely revolutionary. That is exactly what made the bubble so seductive: the underlying story was true, even though the prices were not justified.

Pets.com raised over $80 million in an IPO and became famous for its sock-puppet mascot. It sold pet supplies below cost and burned through cash. It went public in February 2000 and shut down about nine months later. The mascot was more valuable than the business.

The aftermath

When interest rates rose and a few high-profile companies missed expectations, confidence cracked. Because so many valuations rested on belief rather than profit, there was nothing solid to catch the fall. Selling fed on itself.

The bust was brutal but it was also a filter. The companies with real businesses survived and, in some cases, went on to dominate the world. Amazon's stock fell more than 90% in the crash, yet the company endured and eventually became one of the most valuable on earth. The bubble destroyed the pretenders and left the survivors stronger.

Investors also relearned an old truth: a transformative technology and a good investment are not the same thing. Being right about the internet did not save you if you paid an absurd price for the wrong company.

The lesson

The dot-com bubble is the classic study of a market driven by narrative. When enough people believe prices can only go up, they buy simply because prices are going up, which is the definition of a bubble. Bubbles have historically ended the same way: the story stays exciting right up until the moment buyers run out.

◆ THE LESSON
A great idea is not automatically a great investment, and a rising price is not proof of value. Throughout history, the most dangerous four words for investors have been 'this time is different'. Eventually, what a business actually earns tends to matter.

Bubbles usually inflate during long bull markets, and the mistakes made in 2000 are the same ones covered in common beginner mistakes.

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Frequently asked

What was the dot-com bubble?

The dot-com bubble was the late-1990s mania for internet stocks, in which adding '.com' to a company name could send its shares soaring even without profits. The tech-heavy Nasdaq Composite peaked at 5,048 on March 10, 2000, then fell roughly 78% by October 2002, wiping out more than $5 trillion in market value.

Why did the dot-com bubble inflate?

It inflated because investors correctly believed the internet would change everything and rushed to buy any connected company without asking whether it could ever earn money. Many dot-coms were valued on 'eyeballs' and website traffic rather than earnings, and easy money, hot IPOs, and fear of missing out pushed prices higher.

Did any companies survive the dot-com crash?

Yes, the bust acted as a filter that destroyed the pretenders and left companies with real businesses stronger. Amazon's stock fell more than 90% in the crash yet the company endured and eventually became one of the most valuable on earth, showing that a transformative technology and a good investment are not the same thing.

What is the lasting lesson of the dot-com bubble?

The lasting lesson is that a great idea is not automatically a great investment, and a rising price is not proof of value. Bubbles form when enough people buy simply because prices are going up, and history suggests the phrase 'this time is different' has been among the most dangerous for investors.

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