The 1920s, often called the "Roaring Twenties," was a decade defined by jazz, rapid industrialization, and an almost religious faith in the American stock market. For the first time in history, the average citizen felt the lure of Wall Street. However, this era of unprecedented prosperity was built on a fragile foundation:
A buyer could purchase a stock by putting down only of the total price in cash. The broker would cover the remaining 80% to 90%, charging interest on the loan. For example, if you wanted $1,000 worth of stock in a booming radio company, you only needed $100 of your own money.
The mechanics of margin buying turned a market correction into a total collapse. As people were forced to sell to cover their loans, the massive volume of sell orders drove prices down further. This triggered a second wave of margin calls for other investors, who then had to sell, driving prices down even lower. buying on margin great depression
A margin call occurs when the value of a stock drops below a certain point. To protect their loan, the broker demands that the investor immediately deposit more cash or sell the stock to cover the debt.
This "forced liquidation" created a downward spiral that couldn't be stopped. In a single day, billions of dollars in wealth vanished. But the damage wasn't contained to Wall Street. From Wall Street to Main Street The 1920s, often called the "Roaring Twenties," was
The tragedy of buying on margin was that it didn't just ruin the speculators; it broke the banking system.
If the stock price doubled to $2,000, you could sell it, pay back the $900 loan, and walk away with $1,100—nearly a on your initial $100 investment. This "leverage" turned modest savings into overnight fortunes, creating a feedback loop where rising prices attracted more margin buyers, pushing prices even higher. The Rise of the Speculative Bubble The broker would cover the remaining 80% to
Brokers had borrowed the money they lent to investors from commercial banks. When investors defaulted on their margin loans, the brokers couldn't pay back the banks. When the banks lost that money, they couldn't fulfill withdrawals for ordinary citizens who had never bought a single share of stock. This led to bank runs, the closing of thousands of financial institutions, and a complete freeze on credit that paralyzed the American economy for a decade. The Legacy: Regulation and Caution