---
title: "Stock Market Crash of 1929 — AP Euro Definition & Guide"
description: "The 1929 Wall Street crash cut off American capital to Europe, collapsing economies built on US loans and fueling extremism. Key to AP Euro Topic 8.5."
canonical: "https://fiveable.me/ap-euro/key-terms/stock-market-crash-of-1929"
type: "key-term"
subject: "AP European History"
unit: "Unit 8"
---

# Stock Market Crash of 1929 — AP Euro Definition & Guide

## Definition

The stock market crash of 1929 was the collapse of US stock prices that caused America to cut off investment capital to Europe, triggering financial collapse across economies dependent on American loans and helping launch the Great Depression (AP Euro Topic 8.5, KC-4.2.III.B).

## What It Is

In October 1929, the US stock market collapsed after years of speculation, including the risky practice of [buying on the margin](/ap-euro/key-terms/buying-on-the-margin "fv-autolink") (purchasing stocks with borrowed money). On its own, that's an American story. For [AP Euro](/ap-euro "fv-autolink"), the crash matters because of what happened next. The United States cut off the flow of investment capital to Europe, and European economies that had been propped up by American loans came crashing down with it.

Here's the chain the CED wants you to know (KC-4.2.III.B): after [World War I](/ap-euro/unit-8/world-war-1/study-guide/oVbBctdhCZgYi3ZADgtO "fv-autolink"), Europe ran on American money. Germany used US loans (via the Dawes Plan) to pay reparations to Britain and France, who used that money to repay war debts to the United States. The whole circuit depended on American capital flowing outward. When the crash hit, American banks called in their loans and stopped lending. The circuit broke, and the financial collapse went global. The crash didn't cause the Great Depression by itself. It was the trigger that exposed deeper weaknesses, including war debt, nationalistic tariffs, overproduction, depreciated currencies, and disrupted trade patterns (KC-4.2.III.A).

## Why It Matters

This term lives in Topic 8.5 (Global Economic Crisis) in [Unit 8](/ap-euro/unit-8 "fv-autolink"): 20th-Century Global Conflicts, and it directly supports learning objective AP Euro 8.5.A, explaining the causes and effects of the global economic crisis of the 1920s and 1930s. The crash is the hinge of the whole topic. Before it, Europe enjoyed fragile, loan-funded recovery. After it, the Great Depression undermined Western European democracies and fomented radical political responses (KC-4.2.III). If you can explain why a Wall Street collapse destroyed German banks and helped [Hitler](/ap-euro/key-terms/hitler "fv-autolink") win votes, you understand the interconnected economy the CED is testing. The crash also bridges Topic 8.5 to the rise of fascism and to government responses like deficit spending and the Soviet Five-Year Plans.

## Connections

### [Dawes Plan (Unit 8)](/ap-euro/key-terms/dawes-plan)

The [Dawes Plan](/ap-euro/key-terms/dawes-plan "fv-autolink") (1924) is the setup; the crash is the payoff. The plan funneled American loans into Germany to stabilize reparations payments, which made Germany totally dependent on US capital. When the crash cut off that capital, Germany's economy was the first to fall.

### [Buying on the Margin (Unit 8)](/ap-euro/key-terms/buying-on-the-margin)

Margin buying is the mechanism behind the crash itself. Investors bought stocks with borrowed money, so when prices dipped, they had to sell fast to cover their debts, which drove prices down further. It's why the crash was a collapse, not a correction.

### [Germany's hyperinflation (Unit 8)](/ap-euro/key-terms/germanys-hyperinflation)

Don't fuse these two crises. [Hyperinflation](/ap-euro/key-terms/hyperinflation "fv-autolink") hit Germany in 1923, before the crash, and was solved by the Dawes Plan. The crash created a different disaster (deflation, bank failures, mass unemployment) in 1929-1933. Together they explain why Germans lost faith in the Weimar Republic twice in one decade.

### [Benito Mussolini (Unit 8)](/ap-euro/key-terms/benito-mussolini)

The Depression that followed the crash is the political fuel for extremism. Economic desperation made radical movements like [fascism](/ap-euro/unit-8/context-20th-century-global-conflicts/study-guide/WwMCWR9g5udYplIchlEA "fv-autolink") look like solutions, which is exactly the 'fomented radical political responses' effect in KC-4.2.III.

## On the AP Exam

On multiple choice, the crash usually shows up in cause-and-effect stems. You might be asked to identify a primary cause of the Great Depression or to explain how the crash affected American investment in Europe. The answer the exam wants is the capital cutoff. The US stopped lending, and loan-dependent European economies collapsed. Memorize that causal chain, not just the date. No released FRQ has used this term verbatim, but it's a natural piece of evidence for any LEQ or DBQ on interwar instability, the failure of democracy in Europe, or the rise of totalitarian regimes. The strongest essays treat the crash as a trigger that exposed existing weaknesses (war debt, tariffs, overproduction) rather than the sole cause of the Depression. That distinction is what separates basic from sophisticated causation arguments.

## stock market crash of 1929 vs The Great Depression

The crash is an event; the Depression is the decade-long crisis that followed. The crash of October 1929 triggered the cutoff of American capital, but the CED is explicit that the Great Depression was caused by deeper weaknesses, including World War I debt, nationalistic tariffs, overproduction, depreciated currencies, and disrupted trade (KC-4.2.III.A). On the exam, calling the crash the cause of the Depression is too simple. It's the spark; the structural weaknesses are the kindling.

## Key Takeaways

- The 1929 stock market crash caused the United States to cut off investment capital to Europe, collapsing economies that depended on American loans (KC-4.2.III.B).
- Germany was hit hardest because the Dawes Plan had made its entire reparations system run on borrowed American money.
- The crash was a trigger, not the whole cause; the Great Depression stemmed from deeper weaknesses like war debt, tariffs, overproduction, and disrupted trade (KC-4.2.III.A).
- Speculation, especially buying on the margin, inflated stock prices and made the collapse far steeper when it came.
- The resulting Depression undermined Western European democracies and fueled radical political movements, including fascism (KC-4.2.III).
- On the exam, always frame the crash as the link in a causal chain from American lending to European collapse to political extremism.

## FAQs

### What was the stock market crash of 1929 in AP Euro?

It was the October 1929 collapse of US stock prices that caused America to cut off investment capital to Europe, triggering financial collapse in loan-dependent European economies and helping launch the Great Depression. In AP Euro it's tested in Topic 8.5 (Global Economic Crisis).

### Did the stock market crash cause the Great Depression by itself?

No. The crash was the trigger, but the CED lists deeper causes, including World War I debt, nationalistic tariff policies, overproduction, depreciated currencies, disrupted trade, and speculation (KC-4.2.III.A). The crash exposed those weaknesses; it didn't create them.

### Why did an American crash cause a depression in Europe?

Because post-WWI Europe ran on American loans. The Dawes Plan funneled US capital into Germany to fund reparations, which flowed to Britain and France to repay war debts. When the crash hit, the US stopped lending and called in loans, breaking the entire circuit (KC-4.2.III.B).

### How is the 1929 crash different from Germany's hyperinflation?

Hyperinflation happened in 1923, when the German mark became worthless and prices skyrocketed; it was fixed by the Dawes Plan. The 1929 crash caused the opposite problem: deflation, bank failures, and mass unemployment in the early 1930s. They're separate crises six years apart.

### How did the Great Depression help fascism rise in Europe?

The Depression undermined Western European democracies and fomented radical political responses (KC-4.2.III). Mass unemployment and bank failures made voters desperate, and extremist movements like Nazism gained support by promising order and economic recovery where democratic governments seemed to fail.

## Related Study Guides

- [8.5 Global Economic Crisis: The Great Depression](/ap-euro/unit-8/global-economic-crisis/study-guide/mMV3VPr5gsPIrbER9BPf)

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