The Great Depression: The Longest and Worst Economic Downturn in U.S. History

The longest and most severe economic and market downturn in American history lasted from 1929 to 1941. In my last history article, I discussed the Roaring Twenties and the dramatic stock market crash that helped trigger the Great Depression. In this article, I will explain what caused the Great Depression, the impact it had on Americans, and how its lessons continue to influence our financial system today.

What Caused the Great Depression?

There were many factors that contributed to the Great Depression, but most historians point to the Stock Market Crash of 1929 as the event that marked its beginning.

In late October 1929, the Dow Jones Industrial Average fell approximately 25% in a single week. By mid-November, the Dow had lost nearly half of its value. While the crash was devastating, it was far from the bottom. The market continued to decline for nearly three more years. By July 1932, the Dow had fallen to 41.22, down from its peak of 381 on September 3, 1929. This represented an astonishing and painful decline of nearly 89%.

Global Scale: Although the Stock Market Crash of 1929 is often viewed as the event that triggered the Great Depression, its roots likely stretched back much further, all the way to World War I. The war left much of Europe burdened by massive debt and economic devastation. Its effects were felt around the world, disrupting trade, financial systems, and economic growth for years to come.

The great economic powers of the 19th century, including Britain, France, and Germany, faced the enormous task of rebuilding after a conflict that had destroyed infrastructure, drained national resources, and claimed the lives of millions of young men who would have been critical contributors to their economies. Germany faced an especially difficult path. In addition to rebuilding after its defeat, it was required to pay significant reparations under the Treaty of Versailles, placing an enormous strain on its economy.

The economic hardship, political instability, and widespread resentment that followed created fertile ground for extremism. These conditions ultimately contributed to the rise of Adolf Hitler and Nazi Germany, demonstrating how the consequences of World War I extended far beyond the battlefield and helped shape the economic and political crises that followed in the 1930s.

Margin Investing: Fueling the Boom and the Bust

One of the major contributors to the crash was the widespread use of margin investing. Investors borrowed money to purchase more stocks than they could afford with cash alone. This strategy worked well as long as stock prices continued to rise.

In simple terms, buying stocks on margin magnifies gains when the market is increasing. An investor can purchase a larger investment with less of their own money, potentially generating much larger profits. However, the opposite is also true. When stock prices decline, losses are magnified as well.

Many investors during the 1920s underestimated this risk. As stock prices fell, they not only lost money on their investments but still owed the borrowed funds, plus interest, to their brokerage firms. When losses became too large, brokerage firms issued what is known as a margin call, requiring investors to either deposit more money or sell their investments.

Unfortunately, many investors did not have additional cash available. To make matters worse, some had borrowed against their homes, farms, and other valuable property to invest in the stock market. As prices continued to fall, many were forced to sell their investments at steep losses and, in some cases, lost their homes, farms, and life savings as well.

Bank Panics: Following the Stock Market Crash of 1929, many Americans feared that banks would fail and that they would lose their savings. As a result, depositors rushed to withdraw their money at the same time, creating what became known as a run on banks.

The reality is that banks do not keep all deposited money sitting in vaults. Instead, they lend much of it to individuals and businesses. When too many customers demanded their money at once, banks often did not have enough cash on hand to meet those withdrawals. As panic spread, even healthy banks came under pressure.

The result was devastating. Thousands of banks failed during the early 1930s, wiping out the savings of millions of Americans. As banks closed, the amount of money available for lending shrank dramatically. Businesses struggled to obtain loans, consumers had less money to spend, and economic activity slowed even further. This created a vicious cycle of falling spending, business failures, job losses, and additional bank closures.

These events occurred before the creation of safeguards such as FDIC insurance, which today helps protect bank deposits and maintain confidence in the banking system. The lessons learned from the bank panics of the Great Depression helped shape many of the financial protections we take for granted today.

In the next article, we will explore additional causes of the Great Depression and examine how it affected the daily lives of ordinary Americans.