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Stock market boom

Written by the Fiveable Content Team โ€ข Last updated September 2025
Written by the Fiveable Content Team โ€ข Last updated September 2025

Definition

A stock market boom refers to a significant increase in stock prices over a period, often driven by investor enthusiasm and speculation, which typically leads to an economic expansion. This phenomenon was particularly prominent during the 1920s, a decade marked by rapid industrial growth, technological advancements, and cultural changes that influenced American society. The stock market boom not only created a sense of prosperity but also contributed to the economic excesses that eventually led to the Great Depression.

5 Must Know Facts For Your Next Test

  1. The stock market boom of the 1920s saw the Dow Jones Industrial Average increase from about 60 points in 1921 to over 380 points by 1929.
  2. Many Americans invested in the stock market during this time, believing it was a surefire way to make money and achieve financial independence.
  3. This era was characterized by rampant speculation, with investors often purchasing stocks on margin, which meant they were borrowing money to buy shares.
  4. The boom led to increased consumer spending and investment in businesses, contributing to the overall economic growth of the Roaring Twenties.
  5. The euphoria surrounding the stock market boom ultimately masked underlying economic weaknesses, setting the stage for the crash in 1929 and the subsequent Great Depression.

Review Questions

  • How did the stock market boom influence consumer behavior during the 1920s?
    • The stock market boom led to increased consumer confidence as people believed they could achieve wealth through investments. Many Americans began spending more on luxury items and participating in consumer culture, encouraged by the notion that prosperity would continue indefinitely. This behavior contributed to an economic climate where credit was easily available, further fueling both consumerism and speculative investments.
  • Analyze how the practices of margin buying and speculation contributed to the volatility of the stock market during the boom.
    • Margin buying allowed investors to purchase more stocks than they could afford outright, which amplified both potential gains and losses. This practice, combined with rampant speculation, created a highly volatile market environment as people invested based on emotions rather than solid financial principles. When prices began to fall, many margin buyers faced margin calls, forcing them to sell at losses and triggering a downward spiral that ultimately contributed to the stock market crash.
  • Evaluate the long-term effects of the stock market boom and subsequent crash on American economic policies and regulations.
    • The stock market boom and its dramatic crash had lasting impacts on American economic policies and regulations. In response to the financial chaos of the Great Depression, reforms were introduced such as the Securities Act of 1933 and the establishment of the Securities and Exchange Commission (SEC) in 1934. These measures aimed to protect investors from fraud and prevent excessive speculation, fundamentally changing how financial markets operated and leading to greater oversight of trading practices.

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