Black Monday

What would happen if the stock market lost more than 20% of its value in a single day? Investors would suffer enormous losses, and some would rush to sell their stocks to avoid losing even more money. On Monday, October 19, 1987, one of the most dramatic stock market crashes in American history took place. That day became known as "Black Monday." At the time, the U.S. stock market had been rising for years. Stock prices began climbing rapidly in 1982, attracting growing interest from investors. As corporate profits improved and the economy expanded, many people became increasingly confident that stock prices would continue to rise. The upward trend continued into 1987. From the beginning of the year through late August, the Dow Jones Industrial Average rose approximately 44%. A stock market index is a number that tracks the combined performance of a group of stocks. The Dow Jones Industrial Average, commonly called the Dow, measures the performance of 30 major American companies. However, rapidly rising stock prices are not always a positive sign. Sometimes, stocks become more expensive than the underlying businesses appear to justify. If investors keep buying shares simply because they expect prices to rise, stock prices can increase much faster than the actual growth of the companies. By the second half of 1987, concerns about the U.S. stock market were growing. Investors were worried about rising interest rates, inflation, the U.S. trade deficit, and changes in the value of the dollar. An interest rate is the percentage charged for borrowing money. When interest rates rise, borrowing can become more expensive for businesses, and investors may become more interested in alternatives to stocks that offer interest income. Against this backdrop, the stock market began showing signs of weakness. Stock prices declined during the middle of October, and on Friday, October 16, the Dow fell approximately 4.6% in a single day. Over the weekend, investors became increasingly concerned about what might happen when trading resumed. Then came Monday, October 19. Stock markets in several Asian countries began falling sharply, and anxiety spread to other markets. When the New York stock market opened, investors rushed to sell their shares. Many wanted to reduce their losses, but there were not enough buyers willing to purchase those shares at the previous prices. What happens when a large number of people suddenly want to sell a stock? Like other products, stocks are affected by supply and demand. When many people want to sell and relatively few people want to buy, sellers must accept lower prices to attract buyers. If this happens repeatedly, stock prices can fall very quickly. The problem was that falling prices encouraged even more selling. Some investors initially sold their stocks to reduce risk, but as prices continued to decline, others began selling out of fear. Selling shares is also called selling or placing a sell order. Falling prices triggered more selling, and that additional selling pushed prices down even further, creating a dangerous cycle. Computer-based trading strategies, which had become increasingly popular at the time, also contributed to the crash. One particularly important strategy was known as "portfolio insurance." A portfolio is a collection of investments, such as stocks and bonds. Portfolio insurance was designed to limit investment losses during market declines, often by selling stock index futures contracts. Imagine that a large investment firm had established a rule requiring it to sell futures contracts whenever the stock market fell below a certain level. A futures contract is a financial agreement to buy or sell an asset at a future date under specified terms. When stock prices declined, the firm would follow its predetermined strategy and sell futures contracts to reduce its exposure to further market losses. But what would happen if many investment firms followed similar strategies at the same time? Each market decline could trigger another wave of large sell orders. These orders could put additional downward pressure on the futures market and eventually the stock market itself. A strategy designed to protect investors from losses could end up accelerating the decline of the overall market. Of course, computer-based trading alone did not cause Black Monday. Concerns about interest rates and the economy, unusually high stock prices, investor panic, and structural weaknesses in the stock and futures markets all played a role. Economists continue to study how much each factor contributed to the crash. By the end of trading on October 19, 1987, the Dow had fallen approximately 508 points, a decline of 22.6% from the previous trading day's close. It remains the largest single-day percentage decline in the history of the Dow Jones Industrial Average. How significant was a 22.6% decline? Imagine that an investor had $1,000 in stocks and that the value of those investments fell by 22.6% in one day. The investment would be worth just $774, representing a loss of $226 in a matter of hours. Of course, individual stocks experienced different declines. This example simply illustrates the magnitude of the market crash. The effects of Black Monday were not limited to the United States. Stock markets in countries including Hong Kong and the United Kingdom also experienced severe turmoil. As investors increasingly participated in international markets and moved money across national borders, financial problems in one country could quickly influence markets elsewhere. But did a 22.6% stock market decline mean that American companies had suddenly become 22.6% less valuable as businesses? Not necessarily. Stock prices are not determined solely by how much money companies are currently earning. They also reflect investors' expectations about future profits, their assessments of risk, and the overall mood of the market. A company might have been producing and selling products normally the day before the crash and continued operating in much the same way the following day. Yet its stock price could still have fallen dramatically because investors had become more worried about the future. Stock prices and business performance are connected, but they do not always move at the same speed. After the crash, U.S. financial authorities took steps to prevent the turmoil from spreading throughout the economy. The Federal Reserve, America's central bank, played a particularly important role. It supported the availability of funding in financial markets and encouraged banks to continue lending normally. Unlike ordinary commercial banks, the Federal Reserve is responsible for helping maintain stability in the nation's monetary and financial system. These actions, together with other market developments, helped the stock market gradually stabilize. The Dow recovered some of its losses relatively quickly and exceeded its pre-crash peak less than two years later. However, not every company's stock recovered at the same pace, and investors who had sold during the crash did not necessarily benefit from the subsequent recovery. Interestingly, despite the enormous stock market decline, the United States did not immediately enter an economic recession. A recession is a period when economic activity, including production, spending, and investment, declines broadly. Although stock markets and the broader economy influence each other, a major stock market decline does not necessarily mean that the entire economy will suffer an equally severe downturn. Black Monday also led to important changes in stock market rules. One example was the development of market-wide "circuit breakers." A circuit breaker is a mechanism that temporarily stops trading when stock prices fall too sharply within a short period. The purpose is to give investors time to review new information and evaluate market conditions. Circuit breakers cannot completely prevent stock prices from falling. Once trading resumes, prices may continue to decline. However, temporarily stopping trading during periods of extreme volatility can help reduce market disorder. Today, exchanges in the United States and several other countries use trading halt mechanisms designed to address unusually severe market movements. Black Monday also taught investors an important lesson. Even after years of steady gains, the stock market can experience an unexpected and dramatic decline. The crash also demonstrated how actions taken by investors to protect themselves can sometimes contribute to greater losses when many people act in the same way at the same time. For this reason, investors should consider the possibility of falling prices rather than assuming that stocks will continue rising. Spreading investments across different companies and types of assets can help manage risk. However, diversification does not eliminate the possibility of losses, especially when the entire stock market declines. Ultimately, Black Monday demonstrated that the stock market is influenced by much more than the underlying value of companies. Investor expectations and fears, computer-based trading strategies, and the connections between financial markets around the world combined to produce an extraordinary crash in a single day. October 19, 1987, remains one of the most important dates in stock market history. Black Monday reminds us that future stock prices cannot be predicted with certainty and that understanding the risks of investing is just as important as recognizing its potential rewards.