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The Roaring 20s and 1929 Crash

Pomegra Learn

The Roaring 20s and 1929 Crash

The 1920s were a genuine economic miracle. Electrification transformed homes and factories. Automobiles created new industries and new ways of living. Radio brought national culture to every corner of the country. Real wages rose, consumer goods became widely accessible, and the stock market—until recently a preserve of the wealthy and the well-connected—opened to millions of ordinary Americans through newspapers, brokerages, and the new mechanism of buying on margin.

The architecture of the bubble​

Three structural features made the 1920s bull market uniquely dangerous. First, margin lending allowed investors to buy stocks with as little as 10 percent down, meaning a 10 percent decline in stock prices would wipe out the entire investment. By the late 1920s, brokers' loans had grown to nearly $8.5 billion—a sum larger than the entire money supply of many countries. Second, investment trusts—the era's equivalent of mutual funds—routinely leveraged their assets to amplify returns, creating pyramids of leverage on top of leverage. Third, a permissive regulatory environment meant that insiders could manipulate stock prices through pools and wash trades with little legal risk.

The peak and the first shock​

The Dow Jones Industrial Average reached its peak of 381 on September 3, 1929. What followed was not an immediate collapse but a gradual deterioration through September and early October, punctuated by a sharp break on October 24—Black Thursday—when nearly 13 million shares changed hands in a single session. Bankers organized a pool to stabilize prices that afternoon, temporarily arresting the decline. But the stability was illusory. The following Tuesday, October 29, the Dow fell 11.7 percent in a single day on record volume. The great bull market was over.

The cascade of consequences​

What made 1929 different from a typical bear market was the margin structure. As stock prices fell, brokers issued margin calls—demands for additional collateral. Investors who could not meet the calls had their positions liquidated at market prices, driving prices lower still and triggering further margin calls. The cascade of forced selling overwhelmed even strong companies. By the summer of 1932, the Dow had fallen 89 percent from its 1929 peak.

The 1929 crash did not cause the Great Depression by itself. But it destroyed the wealth of millions of households, shattered confidence in the banking system, and set in motion the credit contraction that would define the 1930s. The twenty-four articles in this chapter trace the full arc: the conditions that enabled the bubble, the mechanics of the crash, the human consequences, and the policy failures that turned a recession into a decade-long catastrophe.

Articles in this chapter​