The 1929 crash
After years of rising prices and heavily expanded debt financing, the US stock market collapsed in October 1929. By its 1932 low, it had lost roughly ninety percent.
Through the 1920s, US stock prices rose sharply for years. A growing share of purchases was financed on credit, sometimes with a very small equity share.
In October 1929, sentiment turned. Because so many positions were leveraged, falling prices forced collateral top-ups or forced sales. Those forced sales pushed prices down further.
The decline didn't end in October. By its low in summer 1932, the market had lost roughly ninety percent. It then took over twenty years for the old high to be reached again in nominal terms.
That's the most uncomfortable number in this entire course, and it belongs here. Claiming stocks are safe over the long run ignores it. What's true is that broad diversification and long time horizons improve the odds, not that they create guarantees.
The amplifying mechanism was debt financing with low margin requirements. With a small equity share, a small price decline triggers a margin call, and failure to meet it forces sales. The lesson on liquidation describes the same dynamic, here at the market level and with correspondingly larger effect.
The lengthening and deepening of the decline through 1932 is largely attributed in research not to the crash itself, but to the economic policy that followed, including restrictive monetary policy, bank failures with no effective deposit insurance, and trade-restricting measures. The crash was a trigger, not the sole cause of the Depression.
For assessing recovery time, the basis of calculation matters. In nominal terms and excluding dividends, the return to the old high took roughly twenty-five years. Accounting for dividends and the intervening deflation, the period comes out considerably shorter. Both figures are correct, and the gap shows how strongly the choice of measure shapes historical claims.
Summary
- Leveraged purchases forced the sales that deepened the crash.
- The decline through 1932 was roughly ninety percent.
- Recovery time depends heavily on whether dividends and deflation are included.
Did you get it?
What role did debt financing play?
Small equity shares led to margin calls and forced sales during declines, which amplified the crash.
Was the crash the sole cause of the Depression?
No. Restrictive monetary policy, bank failures, and trade restrictions all contributed substantially.
Why do different recovery times circulate?
Because they depend on whether dividends and the intervening deflation are included.
Sources and further reading
- Historical price series of the US stock market, and standard economic-history literature on the Great Depression.
Related
- Bull market, bear market, crash, bubbleStage 0
- LiquidationStage 2
- Why every bubble looks the sameMarket History