The stock market crash of 1929: what fell, how long it took to recover, and what protected a portfolio
The 1929 crash in numbers: an 85% fall in US stocks, 25 years to recover in price, 7 years with dividends and deflation counted, what caused it, what bonds and a 60/40 portfolio did, and what it teaches today.
The crash of 1929 is the event every later crash is measured against. It is also widely misremembered: the famous days in October 1929 were not the bottom but the beginning. The market kept falling for almost three more years, and the real damage was done in 1930–1932, not in October 1929. This guide gives the numbers from the monthly record (Robert Shiller's S&P composite data, 1871–today), then asks the question that matters for a portfolio now: what would have protected an investor, and what does the episode teach that still applies?
The crash in numbers
| Measure | Figure |
|---|---|
| Peak | September 1929 |
| Bottom | June 1932 |
| Fall in price (monthly averages) | −85 % |
| Fall with dividends reinvested | −82 % |
| Fall after inflation (prices fell 27 % 1929–33) | −77 % |
| Back to the 1929 peak in price | September 1954, 25 years later |
| Back to the peak with dividends reinvested | January 1945, 15 years |
| Back to the peak in real terms, dividends reinvested | November 1936, 7 years |
| Dividends per share, 1929 → 1933 | cut by about half |
Source: Shiller monthly data (monthly average prices, dividends and CPI); InvestWealth calculations. Monthly averages understate the exact daily peak and trough.
Three numbers in this table deserve a pause. The 85 % fall means that $10,000 at the top was worth about $1,500 at the bottom; a 50 % crash, the kind investors fear today, would have been the halfway point. The 25 years to recover in price is the figure usually quoted, and it is true, but it is the wrong one for an investor: it ignores the dividends paid along the way and the fact that consumer prices fell by a quarter, so each dollar bought more. Counting dividends and inflation, a 1929 investor who held on was whole again by late 1936, seven years after the top. Brutal, but a different story from "a quarter of a century".
What caused the crash of 1929
No single cause, and historians still argue about the weights. The ingredients most agree on:
- Leverage. Stocks were widely bought on margin with 10 % down; brokers' loans had reached a level that forced selling once prices turned. A 10 % fall wiped out a margin buyer and produced a sale, which produced the next fall.
- Valuation after a long boom. The market had roughly quadrupled from 1921 to 1929 while earnings grew far less; the cyclically adjusted price-earnings ratio reached a level not seen again until 2000.
- A tightening central bank. The Federal Reserve raised rates in 1928–29 to curb speculation, into an economy that was already slowing.
- The policy response after the crash turned a crash into a depression. Bank failures (about 9,000 banks closed from 1930 to 1933), a shrinking money supply, the Smoot-Hawley tariff of 1930 and the gold-standard constraint on monetary policy are the reasons the fall lasted until 1932 instead of ending in 1930. The crash itself was a market event; the Depression was a policy one.
Year by year: stocks, bonds, inflation
| Year | US stocks | 10-year Treasuries | Inflation | 60/40 portfolio |
|---|---|---|---|---|
| 1929 | −4.2 % | +5.8 % | +0.6 % | −0.2 % |
| 1930 | −24.0 % | +3.2 % | −6.4 % | −13.1 % |
| 1931 | −41.8 % | +0.9 % | −9.3 % | −24.7 % |
| 1932 | −11.1 % | +6.3 % | −10.3 % | −4.1 % |
| 1933 | +54.4 % | +5.0 % | +0.8 % | +34.7 % |
| 1934 | −2.8 % | +5.9 % | +1.5 % | +0.7 % |
| 1935 | +47.0 % | +4.2 % | +3.0 % | +29.9 % |
| 1936 | +35.8 % | +2.5 % | +1.5 % | +22.5 % |
Calendar-year total returns, US data (Shiller; the same series as the withdrawal calculator); 60/40 rebalanced once a year, before costs.
What protected a portfolio
Government bonds did their job. Through the four fall years 1929–1932, 10-year Treasuries returned +17 % while stocks lost 62 %. With prices falling 23 % over the same years, the bonds' real return was higher still. This is the textbook case of the stock–bond hedge: a deflationary bust, in which the thing that hurts stocks (falling prices, falling demand) helps bonds. 1931 is still the worst year a 60/40 portfolio has had in 154 years, at −24.7 %, but that is a third of what stocks alone lost.
Diversification shortened the recovery dramatically. $100,000 in stocks at the end of 1928 was worth about $38,000 at the end of 1932 and did not regain $100,000 in nominal terms until 1944. The same $100,000 in a 60/40 portfolio bottomed at about $63,000 and was back above $100,000 by 1935. After inflation, the 60/40 investor was ahead of the start by 1936 with room to spare.
Cash was better than it looks. With consumer prices falling 27 %, a dollar under the mattress gained 37 % in purchasing power from 1929 to 1933. Deflation is the one environment in which cash is a strong asset; in every inflationary crash since, it has been the opposite.
What did not protect anyone: owning "more stocks", owning the leaders of the previous boom (utilities and radio stocks fell furthest), or waiting for a bounce. The market had rallies of 20 % or more several times between 1929 and 1932 before falling to new lows.
Could a rules-based investor have avoided it?
The 1929–1932 fall was slow: 33 months from peak to bottom. That is the kind of decline a monthly process can respond to, because the trend turned down early and stayed down. Trend following across a century of data shows its best results in exactly these long bear markets, and its weakest in sudden crashes such as 1987 or 2020. Whether a specific rule would have stepped aside in late 1929 depends on the rule, and we do not disclose ours; the point is structural. Long falls give a process time; fast falls do not.
What 1929 teaches today
- The first leg is not the bottom. October 1929 took the index down about a third from its September average; the next two and a half years took it down by half again. Averaging in after the first crash felt brave and was early by two years.
- Leverage turns a bear market into a wipeout. Margin was the accelerant in 1929 and has been in every crash since. Our crash protection guide starts there.
- Dividends and inflation change the recovery arithmetic. The 25-year number is a headline, not a portfolio outcome. Use total return, after inflation, when you judge how long recovery takes; the drawdown and recovery calculator does the arithmetic.
- The hedge worked because the crisis was deflationary. In 2022 the crisis was inflationary and bonds fell with stocks. Which kind you are in is measurable: see when bonds stop hedging.
- Test your mix against 1929 before you need to. The Portfolio Crash Test runs any stock/bond/gold mix through the big falls since 1955; the how long will my money last calculator includes the 1929 start year for a retiree.
Frequently asked questions
How much did the stock market fall in the 1929 crash?
From the September 1929 peak to the June 1932 bottom, US stocks fell about 85 % in price (monthly averages, Shiller data), about 82 % with dividends reinvested, and about 77 % after the 27 % deflation of those years is counted. $10,000 at the top was worth about $1,500 at the bottom.
How long did it take the stock market to recover from 1929?
In price, 25 years: the index regained its September 1929 average in September 1954. With dividends reinvested, January 1945 (15 years). With dividends reinvested and inflation counted, which is what matters for purchasing power, November 1936, about seven years.
What caused the stock market crash of 1929?
A speculative boom financed with margin debt, a market that had quadrupled since 1921 on much smaller earnings growth, and a Federal Reserve that tightened into a slowing economy. The crash became the Great Depression because of what followed: thousands of bank failures, a shrinking money supply, the 1930 tariff and the gold standard's limits on monetary policy.
What happened on Black Tuesday 1929?
Black Thursday (24 October) and Black Tuesday (29 October 1929) were the panic days in which record volumes were traded and the index fell by double digits in two sessions. They marked the end of the boom, not the bottom: the market fell for 33 months in total and did not bottom until June 1932.
What protected investors in 1929?
Government bonds: 10-year Treasuries returned about +17 % from 1929 to 1932 while stocks lost 62 %, and cash gained purchasing power as prices fell 27 %. A 60/40 portfolio bottomed at about −37 % against −62 % for stocks and was back above its starting value by 1935 in nominal terms, 1936 after inflation.
Could a crash like 1929 happen again?
An 85 % fall in a broad index is far outside anything since; the structural causes (10 % margin, no deposit insurance, a central bank bound by gold) no longer apply in that form. But falls of 50–57 % happened in 1973–74, 2000–02 and 2007–09, and no rule prevents a deeper one. The useful response is not a forecast but a portfolio whose worst case you can live through.
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