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Practical stock researchModule 5, lesson 21 of 23

Case study: a valuation bubble (technology shares, 1999-2002)

How technology share valuations rose and collapsed around 2000, what prices implied about growth, and how long recovery took for the index and companies.

5 min read
Intermediate
Updated

In this lesson

  • Describe the rise and fall of technology share prices between the late 1990s and 2002.
  • Use a reverse DCF to show the growth implied by very high valuations.
  • Explain why recovery times differed so much between the index and individual companies.
  • Explain why buying good companies at any price can still lead to poor returns.

Builds on

  • Reverse DCFThe case uses a reverse DCF to show what bubble prices implied.
On this page
  1. In simple terms
  2. The rise and fall
  3. What the prices implied
  4. Different companies, different fates
  5. Why investors paid those prices
  6. Lessons for investors
  7. Why it matters
  8. Limitations
  9. Common mistakes
  10. Try it yourself

In simple terms

In the late 1990s, investors became convinced that the internet would transform the world, and they were right. But they paid prices for technology shares that assumed every promising company would succeed spectacularly and quickly. When reality arrived, prices collapsed. The episode, often called the dot-com bubble, is the classic modern example of good ideas bought at bad prices.

The rise and fall

DateNasdaq Composite
Early 1995around 750
10 March 2000closing peak of about 5,049
October 2002low of about 1,114, a fall of about 78%
23 April 2015first close above the March 2000 peak

The index, heavily weighted to technology companies, took fifteen years to regain its peak. Technology, media and telecom shares in other markets, including India, also rose sharply in 1999 and early 2000 and fell heavily afterwards.

What the prices implied

A useful way to understand a bubble is to ask what prices assumed, using a reverse DCF.

Worked example: A made-up company at a bubble price

A company earns ₹100 crore and is valued at ₹15,000 crore, a P/E of 150. Suppose investors want a 12% yearly return, and that in ten years the company will be valued at a more normal P/E of 20.

Value needed in ten years: 15,000 × 1.12^10about ₹46,600 crore
Earnings needed at a P/E of 20about ₹2,330 crore
Growth needed: (2,330 ÷ 100)^(1/10) − 1about 37% a year for ten years

Very few companies in history have grown earnings that fast for that long. At the peak, prices like this were common, and many companies had no earnings at all.

Different companies, different fates

  • Some disappeared. Pets.com, a heavily promoted online pet supplies retailer, went out of business in November 2000, about nine months after its stock market listing. Many others followed.
  • Some survived but took years to recover. Even companies with real, growing businesses lost most of their value. Networking equipment maker Cisco, among the largest companies in the world at the peak, lost around four-fifths of its value. Amazon fell more than 90% before eventually rising far beyond its old peak, many years later.
  • Survivorship bias makes the episode look better than it was. We remember the winners; most bubble-era investors held companies that never recovered, as the survivorship bias entry explains.

Why investors paid those prices

The patterns described in the investment mistakes and herding lessons were all present:

  • A true story: the internet really was transformative.
  • Rising prices attracting new buyers, many new to investing.
  • Valuation dismissed: new measures, such as website visitors, replaced profits.
  • Fear of missing out, as early buyers made fortunes.
  • Easy money for new listings, with companies going public with little revenue.

Lessons for investors

  1. The price paid matters, even for great companies. A business can succeed and still be a poor investment if the price assumed too much.
  2. Ask what the price implies, with a reverse DCF, and whether that is plausible.
  3. Recovery can take very long. Fifteen years for the index; never for many companies.
  4. Diversification and valuation discipline limit the damage when a theme collapses.
  5. "This time is different" deserves extra scepticism when used to dismiss valuation.

Why it matters

Every generation meets a new technology or theme that promises to change everything. The dot-com episode shows how to respect the idea while staying disciplined about the price, and how costly it is to buy the story at any price.

Limitations

Index levels and examples summarise a complex period across many markets. Individual company outcomes varied enormously. Hindsight identifies the bubble clearly; at the time, many careful investors disagreed about whether prices were excessive.

Common mistakes

  • Believing a great idea justifies any price.
  • Learning only from the survivors.
  • Assuming a fall will recover quickly.
  • Replacing profits with new, flattering measures.

Try it yourself

  1. Pick a company today with a very high P/E and run the reverse DCF above with its figures.
  2. Compare the implied growth with what the company has achieved over the past five years.
  3. List three companies that were celebrated in a past boom and find out what happened to each.

Key takeaways

  • The Nasdaq Composite, heavy in technology shares, rose from around 750 in early 1995 to a closing peak of about 5,049 on 10 March 2000.
  • It then fell about 78% to its low in October 2002, and did not close above its 2000 peak until April 2015, fifteen years later.
  • At the peak, many prices implied decades of extraordinary growth. Even companies that later succeeded could not justify those prices for many years.
  • Some companies disappeared, such as Pets.com, which closed in November 2000, nine months after its listing. Others fell more than 90% and recovered only much later.
  • The internet did change the world. The lesson is about the price paid, not the idea.

Check your understanding

A made-up company earns ₹100 crore and is valued at ₹15,000 crore, a P/E of 150. If investors want 12% a year and a P/E of 20 in ten years, roughly how fast must earnings grow each year for ten years, ignoring dividends?

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Terms used in this lesson

Bubble
A period when prices rise far beyond what the underlying businesses or assets can justify, driven by the crowd and easy credit, before collapsing.
Reverse DCF
Working backwards from the current share price to find the growth, margins or returns the market must be assuming.
Survivorship bias
The error of judging something by the examples that survived or succeeded, while ignoring the many that failed and dropped out of view.

References

  1. Nasdaq surpasses internet bubble peak to set new record (23 April 2015), Fortune. The Nasdaq Composite passed its March 2000 closing peak for the first time on 23 April 2015.

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This lesson is general education, not investment advice. Examples use made-up or clearly dated figures to explain ideas; they are not recommendations. Read the disclaimer.