
On October 19, 1987, the stock market experienced a historic crash known as Black Monday.
The Dow Jones Industrial Average plummeted 508 points, or 22.6%, in a single day, wiping out $500 billion in market value.
This was the largest one-day percentage decline in the Dow's history, and it marked the beginning of a prolonged bear market.
The crash was triggered by a combination of factors, including a decline in the value of the US dollar, a rise in interest rates, and a surge in oil prices.
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Causes and Events
The 1987 stock market crash, known as Black Monday, was a complex event with multiple causes and events leading up to it. Program trading, which involves bundles of trades comprising 15 or more securities and worth more than $1 million, was viewed as one of the main culprits in the crash.
Program trading, particularly index arbitrage and portfolio insurance, was widely used by investors, including pension funds, mutual funds, and hedge funds. These programs relied on computers to buy and sell large collections of investments, reducing costs and allowing savings to be passed on to small investors. However, they also allowed traders to match their holdings to a particular stock index, which can exacerbate market volatility.
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The rapid fall of stock prices and market indexes triggered automatic sell orders in many computer programs, worsening the drop. This was further complicated by the fact that financial market analysts couldn't agree on the underlying causes of the crash. Democrats blamed Reagan for causing the disaster by allowing budget and trade deficits to balloon.
Stock markets had been racing upward during the first half of 1987, with the DJIA gaining 44 percent in seven months. However, by late August, concerns of an asset bubble were stoked, and in mid-October, a storm cloud of news reports undermined investor confidence, leading to additional volatility in markets.
The federal government disclosed a larger-than-expected trade deficit, and the dollar fell in value, foreshadowing the record losses that would develop a week later. A number of markets began incurring large daily losses on October 14, and on October 16, the rolling sell-offs coincided with an event known as "triple witching", which describes the circumstances when monthly expirations of options and futures contracts occurred on the same day.
By the end of the trading day on October 16, the DJIA had lost 4.6 percent. The weekend trading break offered only a brief reprieve, as Treasury Secretary James Baker publicly threatened to de-value the US dollar on Saturday, October 17. This threat further eroded investor confidence, leading to a cascade of sell orders in stock markets around the world.
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Some of the key factors that contributed to the Black Monday crash include a strong bull market that was overdue for a correction, program trading, portfolio insurance, triple witching, and mass panic. Here are some of the key events leading up to the crash:
- Strong bull market overdue for a correction: Stock prices had tripled in value since 1982.
- Program trading: Computerized trading was increasingly making its presence felt at several Wall Street firms, generating strong positive feedback that accelerated the crash.
- Portfolio insurance: A program trading strategy that aimed to hedge a portfolio of stocks against market risk, but ended up exacerbating the crash.
- Triple witching: The simultaneous expiration of stock options, stock index futures, and stock index options contracts on October 16.
- Mass panic: The international political climate made investors jittery, and the media amplified the developments, contributing to the crash.
Immediate Effects
Black Monday had far-reaching effects on the global economy. Stock prices plummeted around the world.
The news of the stock market crash dominated television, with the three major networks preempting their regular programming to provide special coverage. Cable news networks, particularly CNN, offered continuous coverage.
David Ruder, the head of the Securities and Exchange Commission, threatened to close the markets to stop the slide. President Ronald Reagan announced that he was puzzled by the financial events, as nothing was wrong with the economy.
He urged Americans not to panic, but many found it difficult to remain calm, given the dire circumstances. The crash conjured images of the start of the Great Depression.
Experts described the calamity on Wall Street as an inexorable chain reaction. This would force industry to slow production and lay off workers.
The ripples of the economic slowdown would reach every corner of the nation, affecting families, schools, retailers, pension funds, and charities.
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Government Response
The government response to the 1987 stock market crash was swift, but ultimately ineffective in stemming the tide of losses.
The US government, led by President Ronald Reagan, was caught off guard by the sudden and severe decline in stock prices.
The Federal Reserve, led by Chairman Alan Greenspan, raised interest rates in an attempt to curb inflation and stabilize the economy.
However, this move only served to exacerbate the market's downward spiral, as higher interest rates made borrowing more expensive and further reduced consumer spending.
The government's lack of preparedness and ineffective response to the crisis was a stark contrast to the more proactive measures taken by other countries, such as the UK and Japan.
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Impact and Aftermath
The impact of Black Monday was significant, but not as severe as many had feared. The recession or depression that some predicted did not occur, and unemployment rates didn't jump.
However, the crash did lead to a dramatic reduction in the number of companies planning to go public, with about 45% abandoning their plans within nine months. This was unprecedented, with over 45% of companies canceling their initial public offerings (IPOs).
The SEC had no clear sense of how to respond to Black Monday, but the NYSE swiftly adopted new rules to control program trading. They also increased capital requirements for specialists and improved trade processing through computer programs.
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Impact

Black Monday didn't lead to a recession or depression, despite initial fears, and unemployment rates didn't jump. However, about 15,000 workers were laid off from Wall Street financial firms.
The stock market didn't prove to be a leading economic indicator, and individual investors didn't avoid the market for years as stock market officials expected. Only about 20 percent of household financial assets in 1987 were tied up in stock, and most of that was indirectly owned through pension plans or mutual funds.
The crash dramatically reduced the number of companies planning to go public and the amount of cash available for other firms to raise in the equity market. 229 businesses had filed papers with the SEC declaring their intention to issue public stock for the first time, but about 45 percent of them abandoned those plans within nine months after the crash.
On average, each company that didn't cancel its planned IPO raised $7.2 million less than it would have done if the IPO had occurred before Black Monday. The SEC had no clear sense of how to respond to Black Monday, but the NYSE swiftly adopted new rules to control program trading.
Black Monday caused about $500 billion in losses when the Dow Jones Industrial Index fell 508 points.
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Aftermath and Response
The aftermath of Black Monday was a crucial turning point in the history of finance. In the aftermath of the crash, the Federal Reserve slashed interest rates by half a percentage point, hoping to free up capital and encourage more lending.
Regulators introduced new protections to prevent flash crashes from program trading. Circuit breakers were introduced in leading stock markets to automatically shut down trading in the event of unusual price movements.
Circuit breakers can stop all trading if an index like the S&P 500 drops unusually. A 7% drop from the close of the previous trading day is considered a Level 1 decline, resulting in a 15-minute trading halt.
A 13% decline is Level 2 and also results in a 15-minute halt. The temporary halts in trading that occur under the circuit breaker system are designed to give investors a space to catch their breath and make rational trading decisions.
The circuit breakers are set at the levels of 7%, 13%, and 20%. The purpose of the circuit breaker system is to try to avoid a market panic where investors just start recklessly selling out all their holdings.
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Market Dynamics
On Black Monday, October 19, 1987, the global stock market experienced a massive crash, with the Dow Jones Industrial Average plummeting 508 points to 1,738.
The market dynamics were characterized by a perfect storm of factors, including a global economic slowdown, a rise in interest rates, and a surge in oil prices.
Investors were caught off guard by the sudden and severe decline in stock prices, leading to widespread panic selling.
The crash was exacerbated by the use of program trading, which allowed computers to rapidly sell large blocks of stock, further fueling the market's decline.
The market's volatility was also influenced by the fact that many investors had taken on excessive leverage, making them vulnerable to even small losses.
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Key Highlights
Black Monday was a catastrophic stock market crash that occurred on October 19, 1987, worldwide, starting in Hong Kong and spreading throughout Asia and Europe before reaching the United States.
The crash was caused in part by computerized trading and portfolio insurance trading strategies that hedged stock market portfolios by selling short S&P 500 Index futures contracts.
This approach backfired, contributing to the severity of the crash.
The Dow Jones Industrial Average (DJIA) plummeted 22.6% in a single day, with a 508-point decline, the largest one-day decline ever.
The DJIA quickly recovered a majority of its losses, gaining back 288 points, or 57%, of the total Black Monday losses, in just two trading sessions.
Here are the key statistics of the Black Monday crash:
- Dow Jones drop: 22.6%
- One-day decline: 508 points
- Recovery: 288 points, or 57%, in two trading sessions
The crash led to the introduction of circuit breakers to prevent future market panics and highlighted the importance of investor preparedness in the face of unpredictable markets.
Understanding the Crash
The 1987 stock market crash, infamously known as Black Monday, was a complex event with multiple contributing factors. The market had been experiencing a strong bull run since 1982, with stock prices tripling in value, making a correction inevitable.
Program trading played a significant role in the crash, as computerized trading systems generated buy and sell orders based on price levels of benchmark indexes or specific stocks. These systems produced strong positive feedback, generating more buy orders when prices were rising and more sell orders when prices began to fall.
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Portfolio insurance, a type of program trading strategy, was also a key factor. This strategy aimed to hedge a portfolio of stocks against market risk by short-selling stock index futures, limiting potential losses if stocks declined in price. However, the computer programs began liquidating stocks as certain loss targets were hit, pushing prices lower and triggering a domino effect.
Triple witching, which occurred on October 16, added to the market's volatility. This phenomenon involved the simultaneous expiration of stock options, stock index futures, and stock index options contracts, leading to extremely high volatility on the last hour of Friday trading.
The combination of these factors, along with mass panic and the international political climate, created a perfect storm that led to the crash. As one observer noted, "It felt really scary", and people started to understand the interconnectedness of markets around the globe.
Here's a summary of the key factors that contributed to the 1987 stock market crash:
- Strong bull market overdue for a correction
- Program trading and portfolio insurance
- Triple witching
- Mass panic and international political climate
Return
Market crashes are inevitable, and Black Monday was a prime example of this.
Knowing that market crashes are temporary, they should be considered opportunities to buy stocks or funds.
Wise investors prepare to buy stocks at lower prices while others sell, and this is exactly what savvy investors did on Black Monday.
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