Wall Street Crash 1929: Causes, Impact, and Legacy

Borrowing to buy shares hits a record again Legacy

Nearly a century after brokers’ loans fuelled the 1929 boom, leverage is again a talking point. Debit balances in US customers’ margin accounts, the closest modern equivalent, reached a record $1.502 trillion in June 2026, according to FINRA, and stood at $1.454 trillion in August, about 37% higher than a year earlier.

The comparison has limits. Margin debt today is small relative to the size of the market and the economy, minimum margin rules have applied since the 1930s, and bank deposits are insured. But the mechanism that turned falling prices into forced selling in 1929 has not disappeared.

Sorkin’s ‘1929’ revives the story Legacy

Exactly a year before this update, the journalist Andrew Ross Sorkin published 1929: Inside the Greatest Crash in Wall Street History and How It Shattered a Nation, the product of eight years’ research. It follows the bankers, politicians and investors from February 1929 to June 1933, and its success reflected a renewed interest in the crash as markets debated whether artificial-intelligence stocks were in a bubble.

Glass–Steagall’s wall comes down Reform

The 1933 rule keeping deposit-taking banks out of securities underwriting was largely repealed, allowing combined financial groups such as Citigroup. Whether that contributed to the 2008 crisis is still argued. Deposit insurance, the other pillar of the 1933 Act, survived and was expanded.

The Dow finally regains its 1929 peak Boom

It took a quarter of a century for the Dow Jones Industrial Average to close above its September 1929 high. An investor who bought at the peak waited through the Depression, a world war and the start of the post-war boom to break even on price, although dividends shortened the wait in total-return terms.

Recovery stalls in a second downturn Depression

After four years of growth, the economy contracted sharply again. Unemployment, which had fallen to about 14% in 1937, rose to about 19% in 1938. Economists still debate how much the cause was tighter fiscal policy, higher bank reserve requirements or the sterilisation of gold inflows. The lesson most drew was that withdrawing support too early can stall a recovery.

Deposit insurance begins and the SEC is born Reform

From 1 January 1934, the new Federal Deposit Insurance Corporation insured deposits up to $2,500 per depositor, and bank failures dropped sharply. On 6 June, Roosevelt signed the Securities Exchange Act, creating the Securities and Exchange Commission to oversee exchanges, brokers and trading, and giving the Federal Reserve power to set margin requirements.

The first SEC chairman was Joseph P. Kennedy, himself a successful 1920s market operator, on the theory that it took one to catch one.

Securities Act and the Banking Act (Glass–Steagall) Reform

The Securities Act required companies selling shares to the public to register them and disclose accurate information. The Banking Act of 1933, known as Glass–Steagall, separated commercial from investment banking and created the FDIC.

Both followed Senate Banking Committee hearings led by counsel Ferdinand Pecora, which revealed insider share pools, preferential deals and tax avoidance by leading bankers, including National City Bank’s Charles Mitchell, one of the men in the 1929 bankers’ pool.

Roosevelt shuts every bank in America Policy

By inauguration day, states across the country had closed or restricted their banks. Roosevelt declared a nationwide bank holiday on 6 March; Congress passed the Emergency Banking Act in a single day on 9 March; and on 12 March Roosevelt explained on the radio that money would be safer in a reopened bank than under the mattress. When banks began reopening the next day, deposits flowed back in.

March 1933 is also the trough of the Depression in the official US business-cycle dates. Unemployment that year averaged about 25%.

Roosevelt defeats Hoover Policy

Franklin D. Roosevelt won the presidency on a promise of a ‘new deal’. The long gap between election and inauguration, then four months, allowed a final banking panic to build over the winter of 1932–33. The Twentieth Amendment, ratified in January 1933, later moved inauguration day to January.

The Dow hits bottom at 41.22 Depression

The Dow closed at 41.22, barely above the level at which the index had started in 1896. The fall from the 1929 peak was 89.2%, far greater than the October crash itself. Much of the decline came after the economy, the banks and the international monetary system had broken down.

The crisis goes global Depression

The failure of Austria’s largest bank, the Creditanstalt, in May set off a run through central Europe and Germany. On 21 September, Britain left the gold standard. To stop gold flowing out of the US, the Federal Reserve raised interest rates in October, in the middle of a depression, a decision later blamed for deepening the US banking crisis.

Countries that left gold earlier generally recovered earlier, one of the clearest findings of later research on the Depression.

The first banking panic Depression

In November 1930, the collapse of banks linked to the Nashville investment firm Caldwell and Company triggered runs across the South. On 11 December, the Bank of United States, with some 400,000 depositors in New York, closed. The Federal Reserve History essay on the panics calls this the moment a ‘typical recession’ began turning into the Great Depression.

Responses differed by Federal Reserve district: Atlanta lent freely to struggling banks; St Louis did not, and hundreds of banks in its district failed.

Hoover signs the Smoot–Hawley Tariff Policy

Begun as a measure to protect farmers, the bill grew into a broad increase in tariffs. More than a thousand economists petitioned Hoover to veto it. Canada, European countries and others retaliated, and world trade shrank sharply over the following years.

Most economists now see the tariff as an aggravating factor rather than a main cause of the Depression, but it remains the classic example of trade protection backfiring during a downturn.

A false dawn: the Dow rebounds to 294 Warning

By spring 1930 the market had recovered much of its autumn loss, and many believed the worst was over. It was the last high for years. From April 1930 prices fell almost without interruption for more than two years, as the real economy deteriorated.

The first low: almost half the value gone Crash

Selling continued after Black Tuesday until the Dow closed at 198.60 on 13 November. In ten weeks the index had lost almost half its value. The New York Fed had cut its discount rate and bought government securities to supply banks with cash, which helped prevent a banking panic in New York that autumn.

Black Tuesday Crash

The most famous day of the crash. Sell orders flooded the exchange from the opening bell and the ticker ran hours behind, so many investors did not know what price they had sold at. The Dow fell 30.57 points to 230.07.

The next morning’s New York Times reported ‘Stocks collapse in 16,410,030-share day, but rally at close cheers brokers’. In two sessions the Dow had lost about 23%.

Black Monday Crash

After a quiet weekend session, selling resumed on Monday on a scale the bankers could not absorb. The Dow fell 12.82% in a day, one of the largest one-day percentage falls in its history. Margin calls went out across the country, forcing more sales the next morning.

Hoover: business is ‘sound and prosperous’ Warning

Markets steadied after Thursday’s rescue, and President Herbert Hoover said that the fundamental business of the country was ‘on a sound and prosperous basis’. Bankers and brokers told newspapers that the worst was over. The calm lasted barely two trading sessions.

Black Thursday Crash

Panic selling hit the market at the opening and prices fell about 11% within hours. Crowds gathered outside the New York Stock Exchange. At midday, leading bankers including Thomas Lamont of J.P. Morgan, Albert Wiggin of Chase National Bank and Charles Mitchell of National City Bank met and agreed to support the market.

Their agent, NYSE vice-president Richard Whitney, walked onto the floor and bid $205 a share for 25,000 shares of US Steel, well above the market. Prices recovered, and the Dow closed only 6.38 points lower. Whitney was later jailed for embezzlement in 1938.

Warnings ignored Warning

On 5 September, the investment adviser Roger Babson said that ‘a crash is coming, and it may be terrific’, and prices dipped. On 20 September, the London financier Clarence Hatry and associates were arrested for fraud, shaking confidence in British markets. On 16 October, Yale economist Irving Fisher said stock prices had reached ‘what looks like a permanently high plateau’. Eight days later came Black Thursday.

The Dow peaks at 381.17 Boom

The Dow Jones Industrial Average closed at 381.17, the top of the 1920s bull market. Brokers’ loans to investors buying on margin had passed $8.5 billion, more than all the currency in circulation in the United States. Many investors had put down only a small share of the price of their stocks.

The economy turns and the Fed tightens Warning

The official US business-cycle peak is August 1929, two months before the crash: production and activity were already turning down. The same month, the Federal Reserve Bank of New York raised its discount rate to 6%, the last step in a series of increases since 1928 aimed at curbing speculative lending.

Speculation and the Fed’s dilemma Warning

The Federal Reserve worried that bank credit was being drawn into stock speculation and began raising interest rates in 1928. Higher rates did little to cool the market, where borrowers expected gains far larger than the cost of a loan, but they tightened credit for the rest of the economy. New investment trusts, often themselves highly leveraged, sold shares to the public on a large scale.

The Roaring Twenties boom Boom

From a low of about 63 in August 1921, the Dow rose about six-fold to its 1929 peak. Mass production of cars, the spread of electricity and radio, and new instalment credit transformed American life, and shares in companies such as RCA became household talking points.

The boom was uneven. Farmers struggled with low prices through most of the decade, and income gains were concentrated at the top. The headline prosperity concealed weaknesses that mattered once the economy turned.