This is a behavioral scenario, not a forecast and not investment advice. The question is what people do, and the record here is the best of any disaster on this site, because we have run this experiment repeatedly.
Where This Stands Now
Checked November 1, 2026. No crash is under way, and valuations don't tell you when one comes. They can stay high for years.
- Stocks are expensive by the long view. The Shiller PE closed October 30 at 40.13, against a long-run mean of 17.44. The record is 44.19, set in December 1999.
- 1929 is the outer edge. The Dow fell 89.2% from September 1929 to July 1932, and didn't regain its peak until November 1954.
- Recent crashes have been shorter. The 2020 fall recovered within months, helped by huge government support that can't be assumed next time.
A stock market crash is the one catastrophe on this site with a thick file of repeat performances. 1929 took the Dow from 381.17 to 41.22. In 1987 it lost 22.6% in a single day. 2008 took US unemployment to 10%. March 2020 pushed the VIX to the highest close on record. Each time, people swore they would behave differently, and the broad pattern came back.
The newest piece is speed. When Silicon Valley Bank failed in March 2023, about $42 billion left in a single day, by phone. Diamond and Dybvig's 1983 model of a bank run says fear of other depositors is enough to bring down a sound bank, and that once took days of queues on the sidewalk.
The 1930s also tell us about the politics. Unemployment hit 25%, about 9,000 of 25,000 banks had gone under by 1933, and Germany's collapse helped bring Hitler to power. Economic damage ends after some years. Political damage from a deep crash can last much longer.
Event Classification
Precedent for This Scenario
The Dow fell 12.82% on October 28, 1929 and 11.73% the next day. The worst came afterward, in a slow slide to July 1932. By 1933, 25% of American workers were unemployed.
2008 and 2020 show what changes when governments act fast: the same panic, far shorter damage. The main lesson from this series of crashes is that the policy response decides the outcome far more than the size of the first fall. Economic scars linger too: Malmendier and Nagel found that people who lived through poor stock returns took less risk in stocks for decades.
Group-by-Group Predictions
Progressive Left After the Crash
High ConfidenceImmediate focus on corporate bailouts and who gets rescued. Demands for bank regulation, debt relief and wealth taxes. Occupy-style protest returns, this time with more of the professional class in it.
What they'll SAY: 'They socialized the losses and privatized the gains, again.'
What they'll DO: Organize hard and win more policy than usual, since crises open the window. Many also hold their own retirement funds and quietly hope the bailout works.
MFT Fairness, Overton Window, Attribution Theory
Conservative Right's Reaction to the Bailouts
High ConfidenceDivided between business conservatives who want rescue and populists who want the banks to fail. The populist side wins the base. Tea Party energy returns, aimed at both government and Wall Street.
What they'll SAY: 'No more bailouts for the people who caused this.'
What they'll DO: Accept help for their own banks, farms and companies. Blame moves toward immigrants and foreign rivals as unemployment stays high.
MFT Loyalty/Authority, Alliance fracture, Funke et al. (2016) on politics after crises
Libertarians and the Bitcoin Believers
Moderate ConfidenceDeclare the crash proof that central banking failed. Move toward gold and crypto, though crypto has tended to fall alongside stocks in panics. The crash is a recruiting event for their ideas.
What they'll SAY: 'The Fed caused this, and the fix is to end it.'
What they'll DO: Buy what they said they would buy, and take heavy losses on leverage. They are the most ideologically consistent group, and not the most protected.
MFT Liberty, Regulatory Focus Theory
Ultra-Wealthy Through the Long Slide
Very high ConfidenceLarge paper losses, followed by an unusually good buying opportunity. Those with cash pick up assets at distressed prices. Lobbying for rescue programs goes into high gear.
What they'll SAY: 'We are all in this together.'
What they'll DO: Buy when others are forced to sell. Asset owners pulled further ahead in the recovery after 2008, because the people who could wait did well from waiting.
Prospect Theory (domain of gains for cash holders), System Justification Theory
Workers Over 55 Watching Retirement Accounts
Very high ConfidenceThe group with no time to recover. Many freeze, avoid opening statements, and later sell near the bottom when they can't stand any more. Retirement plans get delayed, and people who retired recently look for work.
What they'll SAY: 'We'll ride it out, the way we always have.'
What they'll DO: Most hold for a good while, then a sizable minority capitulate late. Myopic loss aversion (Benartzi & Thaler) makes checking the account more often painful and less rational.
Prospect Theory, Myopic Loss Aversion, Status Quo Bias
Working Families and Precarious Households
Very high ConfidenceThey own the fewest stocks and take the deepest hit, through layoffs that arrive six to eighteen months later. Credit cards go first and cars next, then housing. Relatives move in together, and side jobs multiply.
What they'll SAY: 'The people on Wall Street caused this, and I'm the one paying for it.'
What they'll DO: Cut spending to the bone and help each other. Political anger follows the length of the unemployment, far more than the size of the market drop.
Moghaddam Staircase, Maslow, Hedonic Adaptation (with chronic-insecurity exception)
Young Investors Who Only Know Rebounds
High ConfidenceThey learned from 2020 that every dip is a gift. They buy the first falls with leverage and options. When the bounce doesn't come, they get wiped out in public, on the same platforms that taught them.
What they'll SAY: 'Diamond hands, it always comes back.'
What they'll DO: Hold longest and lose most, then leave the market for a decade. Malmendier and Nagel's "depression babies" suggests this cohort stays wary of stocks for decades.
Reference Point Shifting (Koszegi/Rabin), Depression Babies (Malmendier & Nagel)
Democratic Governments Under Pressure
Very high ConfidenceEmergency lending, deposit guarantees, stimulus and frantic negotiations. Incumbents lose elections whatever they did. Far-right parties have historically gained after financial crises (Funke, Schularick and Trebesch).
What they'll SAY: 'The fundamentals of the economy are strong.'
What they'll DO: Say that right up until they are forced to act. Waiting too long is the most expensive mistake on the list, and it is the one every government is tempted to make.
Elite Panic (Clarke & Chess), Overton Window, Thermostatic Opinion (Wlezien)
Central Banks and Regulators
High ConfidenceCut rates, flood the system with liquidity and stand behind deposits. All of this is well rehearsed since 2008. The new limits are inflation and government debt, which leave less room than in earlier rescues.
What they'll SAY: 'We have all the tools we need.'
What they'll DO: Use every tool, and invent a new one or two. Bernanke's work on the 1930s is the playbook: a broken credit system does damage all on its own.
Bernanke (1983) on credit channels, Diamond-Dybvig (1983)
Banks, Depositors and the Phone-Speed Run
High ConfidenceA bank with a concentrated customer base wobbles, group chats light up, and billions leave in hours. Regulators step in over a weekend. Depositors at other banks start moving money to the largest ones.
What they'll SAY: 'Our bank is safe and well capitalized.'
What they'll DO: Move their money first and check the facts later. Diamond and Dybvig's point was that this is rational once you think others are running. SVB took about a day.
Diamond-Dybvig (1983), Information Cascades, Social Amplification of Risk
Financial Media and Social Platforms
High ConfidenceRed screens and countdown graphics for weeks, and a parade of people who claim they called it. Panic sells early, and in the long grind coverage fades, right as job losses peak.
What they'll SAY: 'Don't panic, but here's what you need to know right now.'
What they'll DO: Cover the index and move on before the layoffs arrive. Calls for a bottom appear repeatedly on the way down.
SARF, Psychic Numbing (Slovic), Fink lifecycle
Timeline
The Break (Weeks 1-8)
A sudden fall, triggered by something that looks minor afterward. Circuit breakers halt trading, as they did four times in March 2020. Retail investors buy the dip. Officials say the system is sound.
The False Recovery (Months 2-6)
Stocks bounce sharply, and people relax. In 1930 the market recovered much of its loss before falling far further. This is the phase that traps the most people, because it confirms what they wanted to believe.
The Grind (Months 6-30)
The real economy follows. Layoffs, foreclosures, bank failures and business closures come after the market has stopped making headlines. Political anger peaks here, well after the worst of the market fall.
The Long Tail (Years to Decades)
Regulation arrives, then fades. A generation distrusts stocks. New parties and movements, born in the anger, outlast the crash. The Dow took until 1954 to regain its 1929 peak.
What Would Change This
- Act early and at scale: The clearest lesson of 1933, 2008 and 2020 is that fast rescues cost far less than late ones.
- Guarantee deposits before the run: Clear insurance limits and clear rescue rules remove the reason to run. Diamond and Dybvig showed that deposit insurance can stop a run from starting.
- Aim help at workers and households: Bank rescues without help for people produce the anger that drives the political aftermath.
- Say what's true about the risk: "The fundamentals are strong" has been used before nearly every bad stretch. Plain statements of what's being done hold trust longer.
- Avoid the 1930s trade war: Countries that turn inward during a crash make it longer. Agreeing on this in advance is far easier than during one.
Myth-Busting
The myth: In 1929 ruined bankers threw themselves out of windows, and Wall Street collapsed in a single terrible day.
The reality: John Kenneth Galbraith went looking for the suicide wave in The Great Crash, 1929 and found the jumpers to be mostly legend.
The bigger misconception is about timing. Most of the fall came slowly, between 1930 and 1932, after people thought it was over. The crash that hurts most people is the long one that follows the crash on the news.
Sources and Frameworks Cited
- Galbraith, J.K. (1955). The Great Crash, 1929. Houghton Mifflin.
- Kindleberger, C.P. (1978). Manias, Panics, and Crashes. Basic Books.
- Reinhart, C.M. & Rogoff, K.S. (2009). This Time Is Different: Eight Centuries of Financial Folly. Princeton University Press.
- Diamond, D.W. & Dybvig, P.H. (1983). Bank Runs, Deposit Insurance, and Liquidity. Journal of Political Economy.
- Bernanke, B.S. (1983). Nonmonetary Effects of the Financial Crisis in the Propagation of the Great Depression. American Economic Review.
- Malmendier, U. & Nagel, S. (2011). Depression Babies: Do Macroeconomic Experiences Affect Risk Taking? Quarterly Journal of Economics.
- Benartzi, S. & Thaler, R.H. (1995). Myopic Loss Aversion and the Equity Premium Puzzle. Quarterly Journal of Economics.
- Funke, M., Schularick, M. & Trebesch, C. (2016). Going to extremes: Politics after financial crises, 1870-2014. European Economic Review.
- Kahneman, D. & Tversky, A. (1979). Prospect Theory: An Analysis of Decision under Risk. Econometrica.
- Shiller, R.J. (2000). Irrational Exuberance. Princeton University Press.
- Wlezien, C. (1995). The Public as Thermostat: Dynamics of Preferences for Spending. American Journal of Political Science.