π₯ Black Monday 1987: The Day Wall Street Crashed Without Warning
“It was like watching a slow-motion earthquake. Phones were ringing off the hook. Everyone was selling, and no one knew why.”
— A New York Stock Exchange trader recalling October 19, 1987
π°️ What Happened on Black Monday?
On October 19, 1987, the Dow Jones Industrial Average crashed 508 points, a drop of 22.6% in a single day — the worst one-day percentage drop in U.S. stock market history. That’s like the NIFTY falling from 25,000 to 19,350 in one session.
⚠️ The Build-Up: Everything Was “Too Good”
- Inflation was falling
- Strong GDP growth
- Stocks were up 43% in the first 9 months of 1987
But under the surface, bond yields rose, the dollar weakened, and valuations became stretched. Still, no one expected a collapse.
π October 19, 1987: Hour-by-Hour Timeline
| Time | What Happened |
|---|---|
| 9:30 AM | Markets open with huge sell orders |
| 10:00 AM | Blue-chip stocks fall 10% |
| 12:00 PM | Phones jammed, brokers overwhelmed |
| 2:00 PM | Computerized selling triggers more panic |
| 4:00 PM | Dow closes down 508 points (-22.6%) |
π» The Role of “Portfolio Insurance”
Portfolio insurance was an algorithmic strategy used to protect portfolios by selling futures when markets dropped. But it accelerated the crash — creating a feedback loop of fear and selling.
π Dow Jones Prices: Crash Week Summary
| Date | Open | High | Low | Close | % Change |
|---|---|---|---|---|---|
| Oct 16, 1987 | 2,355.74 | 2,367.17 | 2,223.73 | 2,246.74 | – |
| Oct 19, 1987 | 2,247.39 | 2,247.39 | 1,738.74 | 1,738.74 | -22.6% |
| Oct 20, 1987 | 1,949.77 | 2,067.47 | 1,616.21 | 1,841.01 | +5.9% |
| Oct 21, 1987 | 1,850.63 | 2,041.94 | 1,850.63 | 2,027.85 | +10.1% |
| Oct 22, 1987 | 2,029.34 | — | 1,883.29 | 1,950.43 | -3.8% |
| Oct 23, 1987 | 1,967.34 | — | 1,917.77 | 1,950.76 | +0.01% |
π§ Key Takeaways from Black Monday
- One day can erase years – Black Monday wiped out 5 months of gains
- Algorithms amplified panic – Tech can help or harm
- Markets recover – But the emotional scars last longer
- Circuit breakers were born – Now standard on all major exchanges
π Market Crashes: A Recurring Theme
- 2000 – Dot-com bust
- 2008 – Lehman collapse
- 2020 – COVID crash
- 2022 – Zomato, Paytm, Crypto collapses
π‘ Final Thought
Whether it’s 1987 or 2025, markets may change, but human behavior doesn't. Study history. Avoid panic. Respect risk. And build wisely.
π’ Share Your Story
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