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Enron collapse 2001: from $90 a share to bankruptcy

In August 2000, Enron stock hit $90. Magazines called it one of America's most innovative companies. Sixteen months later, it filed what was then the largest bankruptcy in US history.

Story · 8-minute read · Updated 2026-10-21

Who they were

Enron started as a natural gas pipeline company in Houston, Texas.

In the 1990s, it changed. It began trading energy like a stock market, buying and selling gas and electricity contracts. Later it traded almost anything: broadband, weather contracts, even advertising time.

Its leaders, chairman Kenneth Lay and later CEO Jeffrey Skilling, were seen as stars. Enron's reported revenue grew to around $100 billion by 2000.

Fortune magazine named it "America's Most Innovative Company" six years in a row.

The problem under the surface

Here's what most people didn't see.

Enron used an accounting method that let it book expected future profits from long deals right away. Real cash often came much later, or not at all.

It also set up many outside companies, called special purpose entities. Some were run by its own finance chief, Andrew Fastow. These were used to move debts and losing bets off Enron's books.

On paper, Enron looked strong and growing. In reality, it was carrying far more debt and risk than its reports showed.

Early doubts

Not everyone believed the story.

In March 2001, a Fortune article by Bethany McLean asked a simple question: "Is Enron Overpriced?" It pointed out that nobody could clearly explain how Enron made its money.

Some short sellers, including Jim Chanos, had already bet against the stock. They had read Enron's own filings and found that the cash didn't match the profits.

What happened

The cracks open

The US Securities and Exchange Commission opened an investigation.

The last chance

A rival, Dynegy, agreed to buy Enron. Late in November, it walked away. Credit agencies cut Enron's debt to "junk".

The stock fell to under $1.

The moment everyone remembers

On 2 December 2001, Enron filed for bankruptcy, with about $63.4 billion in assets. It was the largest US bankruptcy ever at that time, until WorldCom the next year.

Thousands of employees lost their jobs.

Many had also kept much of their retirement savings in Enron stock. When the stock collapsed, so did those savings. That's the part of the story people remember most.

What happened to the people

In 2002, Congress passed the Sarbanes-Oxley Act, which tightened rules on company accounts and made bosses personally sign off on them.

What it teaches

1. Follow the cash, not just the profits

Enron reported big profits, but cash coming in told a different story. That gap was the clue. Our free cash flow page and earnings report page explain what to look at.

2. "Nobody can explain it" is a warning

If smart people can't say how a company makes money, that's not a sign it's too clever to understand. It may be a sign there's something to hide.

3. Don't put everything in one place

Employees who held mostly Enron stock lost their job and their savings at the same time. Spreading money out is one of the simplest ways to make sure one failure can't take everything. See diversification.

Ask yourself: "If my biggest holding went to zero tomorrow, what would I have left?" If the answer is "not much", that one holding is too big.

4. Watch out for falling in love with a story

The more people believed in Enron, the harder it became to see the doubts. That's confirmation bias: noticing only what agrees with you. A written plan, with a clear exit, helps you act on facts instead of hopes. Our trading plan guide shows how.

What it doesn't mean

Timeline

DateEvent
1985Enron formed from a pipeline merger
1990sBecomes a major energy trader
Aug 2000Stock peaks at about $90
Mar 2001Fortune asks "Is Enron Overpriced?"
14 Aug 2001Skilling resigns as CEO
16 Oct 2001Big loss and $1.2 billion cut to shareholders' equity
Nov 2001Profits restated back to 1997; Dynegy deal collapses
2 Dec 2001Enron files for bankruptcy with $63.4 billion in assets
2002Arthur Andersen convicted; Sarbanes-Oxley Act passed
2005Supreme Court overturns Andersen's conviction
May 2006Lay and Skilling convicted; Lay dies in July
2019Skilling released from prison

Questions

Why did Enron collapse?

Enron used accounting tricks and outside companies to hide debt and losses, making it look far stronger than it was. When the hidden losses came out in late 2001, investors and lenders lost trust, and it filed for bankruptcy on 2 December 2001.

What was Enron's highest stock price?

Enron's stock peaked at about $90 a share in August 2000. By late November 2001, it had fallen below $1.

What happened to Enron's executives?

Finance chief Andrew Fastow was sentenced to 6 years. Jeffrey Skilling was convicted in 2006 and sentenced to 24 years, later cut to 14; he was released in 2019. Kenneth Lay was convicted but died before sentencing.

What law was passed because of Enron?

The Sarbanes-Oxley Act of 2002 tightened rules on company accounting and made top executives personally certify their company's financial reports.

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