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The crash of 1929: how the Dow fell 89%

In September 1929, the Dow hit a record. Less than three years later, it had lost 89% of its value. It didn't get back to that high until 1954.

Story · 7-minute read · Updated 2026-10-21

The world before the crash

The 1920s were a boom time in America. Cars, radios and electric power spread fast. New companies grew quickly.

Stocks rose with them. The Dow Jones Industrial Average, an index of big US companies, rose about six times from August 1921 to its peak.

Owning stocks became a national hobby. People who had never invested before wanted in.

And many of them bought with borrowed money.

How people bought stocks

In the 1920s you could buy shares "on margin". You paid part of the price and your broker lent you the rest.

How small was the down payment? Accounts vary, but it was often far less than today's rules allow, and as little as 10% is a commonly cited figure.

In plain words: with $100 you could control about $1,000 of stock. When prices rise, that feels wonderful. When they fall, the broker wants money back, fast. That's a margin call.

If you can't pay, the broker sells your shares. That selling pushes prices down, which triggers more margin calls. The spiral feeds itself.

What happened

On 3 September 1929, the Dow closed at a record 381.17.

Prices wobbled through September and early October. Then the floor gave way.

• Thursday 24 October ("Black Thursday"): Panic selling hit at the open. A record of nearly 13 million shares traded. Big bankers met and bought stocks to calm the market. It worked, for a day or two.
• Monday 28 October ("Black Monday"): The Dow fell nearly 13%.
• Tuesday 29 October ("Black Tuesday"): It fell nearly 12% more. Trading was so heavy the ticker that printed prices ran hours behind.

In those two days alone, the Dow lost about a quarter of its value.

The moment everyone remembers

Black Tuesday is the day in the history books. But the crash in October was only the start.

The market bounced in early 1930, and many people thought the worst was over. It wasn't. As the US economy slid into the Great Depression, banks failed, jobs vanished and stocks kept falling.

On 8 July 1932, the Dow closed at 41.22. That was about 89% below its 1929 peak.

It didn't close above 381.17 again until 23 November 1954, a full 25 years later.

What changed afterwards

The crash and the Depression led to big changes in how US markets work:

• The Securities Act of 1933 and the Securities Exchange Act of 1934 set rules for what companies must tell investors.
• The 1934 law created the SEC, which still oversees US markets today.
• The Federal Reserve was given power to set margin rules, limiting how much people can borrow to buy stocks.

What it teaches

1. Borrowed money makes falls faster

The 1929 crash wasn't caused by margin alone. But margin turned a fall into a stampede, because selling forced more selling.

Today's rules are much stricter. The idea is the same though. Read leverage and margin explained before you ever use borrowed money.

2. Big losses take big gains to recover

An 89% loss sounds like "almost everything". The math is harsher than it sounds. To get back from 41 to 381, the Dow needed to rise more than 800%.

Try it yourself with the loss recovery calculator: a 50% loss needs a 100% gain to get back. That's why we keep each trade's loss small. It's a math fact, not a promise of anything.

3. "It's bounced, so it's over" is a guess

Early 1930 felt like a recovery. It turned out to be a pause. A trend is defined by what price does, not by what we hope. Read how to identify a trend: a down trend stays a down trend until it stops making lower highs and lower lows.

What it doesn't mean

• It doesn't mean another 1929 is always around the corner. It was the worst fall in the Dow's history, driven by a rare mix of borrowing, bank failures and policy mistakes.
• The "25 years" number has a caveat. It tracks the index price only. Dividends, and falling prices in the 1930s, meant some investors who held on got back sooner in real terms. Economists still debate the details.
• The famous stories of brokers jumping from windows are mostly myth. Historians have found few such cases in October 1929.
• It doesn't tell you what any market will do next. History shows what's possible, not what's coming.

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