Lessons from the '87 Crash

Enjoying the Dow's record run? Don't get too comfy. The market's Black Monday breakdown is a reminder of how quickly investor sentiment can turn

by Ben Steverman

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As major stock indexes hit all-time highs, it's worth looking back 20 years to a far gloomier time, when investors were cruelly and suddenly reminded that the value of their investments can depend on something as unpredictable as a mood swing.

Every once in a while, fear, snowballing into panic, sweeps financial markets—the stock market crash of October, 1987, now celebrating its 20th birthday, is a prime example.

In the five trading sessions from Oct. 13 to Oct. 19, 1987, the Dow Jones industrial average lost a third of its value and about $1 trillion of U.S. stock market value was wiped out. The losses culminated in a panic-stricken 22.6% decline in the Dow on Black Monday, Oct. 19. The traumatic drop raised recession fears and had some preparing for another Great Depression.

Stock market crashes were nothing new in 1987, but previous financial crises—in 1929, for example—often reflected fundamental problems in the U.S. economy.

Mysterious Meltdown

The market's nervous breakdown in 1987 is much harder to explain. Especially in light of what came next: After a couple months of gyrations, the markets started bouncing back. The broad Standard & Poor's 500-stock index ended 1987 with a modest 2.59% gain. And in less than two years, stocks had returned to their pre-crash, summer of 1987 heights.

More importantly for most Americans, the U.S. economy kept humming along. Corporate profits barely flinched.

To this day, no one really knows for sure why the markets chose Oct. 19 to crash. Finance Professor Paolo Pasquariello of the University of Michigan's Ross School of Business says the mystery behind 1987 prompted scholars to come up with new ways of studying financial crises. Instead of just focusing on economic fundamentals, they put more attention on the "market microstructure," the ways people trade and the process by which the market forms asset prices.

True, in hindsight there are plenty of adequate reasons for the '87 crash. Stocks had soared through much of 1987, hitting perhaps unsustainable levels: In historical terms, stock prices were way ahead of corporate profits. New trading technology and unproven investing strategies put strain on the market. There were worries about the economic impact of tensions in the Persian Gulf and bills being considered in Congress.

Out of Sorts

But for whatever reason, the mood on Wall Street shifted suddenly, and everyone tried to sell stocks at once. "Something just clicked," says Chris Lamoureux, finance professor at the University of Arizona. "It would be like a whole crowded theater trying to get out of one exit door."

It's a fairly common phenomenon on financial markets. Every stock transaction needs a buyer or a seller. When news or a mood shift causes a shortage of either buyers or sellers in the market, stock prices can surge or plunge quickly. Most of the time, balance is quickly restored. Lower prices draw in new buyers looking for a bargain, for example.

Sometimes, as in 1987 and many other true crises, things get out of hand. What happens at these moments is a mystery that may be best explained by dynamics deep within human nature.

Usually, explains behavioral finance expert Hersh Shefrin, a professor at Santa Clara University, investors believe they understand the world. In a crisis, "something dramatically different happens and we lose our confidence," Shefrin says. "Panic is basically a loss of self-control. Fear takes over."

Buyers and Sellers

Why don't smart investors, seeing others panic and sell stocks, step in to buy them up at a bargain?

First, it's very hard, in the midst of a crisis, to tell whether markets are acting rationally or irrationally. Buyers refused to enter credit markets this summer on fears about risky mortgage debt. It will take months, maybe years, to add up the full impact of losses on subprime loans.

It's also tough to think rationally yourself. "It's hard to keep your emotions in check when your money is on the line," Shefrin says.