Stock Markets and Other Financial Markets

Bad Policies Triggered 1987 Stock Market Crash

Yesterday, October 19, was the 10th anniversary of the stock market crash of 1987, which saw the Dow Jones Industrial Average drop 508 points in one day -- a 23 percent fall equivalent to an 1,800 point drop today . Next to the crash of 1929, the crash of 1987, dubbed Black Monday, has been one of the most thoroughly studied events in financial history. The lessons learned may be one reason why the market has risen almost continually ever since (see figure).

Initial blame for the 1987 crash centered on the interplay between stock markets and index options and futures markets. In the former people buy actual shares of stock; in the latter they are only purchasing rights to buy or sell stocks at particular prices. Thus options and futures are known as derivatives, because their value derives from changes in stock prices even though no actual shares are owned. The Brady Commission concluded that the failure of stock markets and derivatives markets to operate in sync was the major factor behind the crash.

While structural problems within markets may have played a role in the magnitude of the market crash, they could not have caused it. That would require some action outside the market that caused traders to dramatically lower their estimates of stock market values. The main culprit here seems to have been legislation that passed the House Ways & Means Committee on October 15 eliminating the deductibility of interest on debt used for corporate takeovers.

Two economists from the Securities and Exchange Commission, Mark Mitchell and Jeffry Netter, published a study in 1989 concluding that the anti-takeover legislation did trigger the crash. They note that as the legislation began to move through Congress, the market reacted almost instantaneously to news of its progress. Between Tuesday, October 13, when the legislation was first introduced, and Friday, October 16, when the market closed for the weekend, stock prices fell more than 10 percent -- the largest 3-day drop in almost 50 years. In addition, those stocks that led the market downward were precisely those most affected by the legislation.

Another important trigger in the market crash was the announcement of a large U.S. trade deficit on October 14, which led Treasury Secretary James Baker to suggest the need for a fall in the dollar on foreign exchange markets. Fears of a lower dollar led foreigners to pull out of dollar-denominated assets, causing a sharp rise in interest rates.

What the 1987 crash ultimately accomplished was to teach politicians that markets heed their words and actions carefully, reacting immediately when threatened. Thus the crash initiated a new era of market discipline on bad economic policy.

Source: Bruce Bartlett, senior fellow, National Center for Policy Analysis, October 20, 1997.


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