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Mark Hulbert: Here’s the research on why you shouldn’t be complacent about investing in stocks

CHAPEL HILL, N.C. (MarketWatch) — Get ready for another 1987-magnitude crash.

Perhaps not today, this week, this month or this year.

But someday.

That’s because it’s inevitable that the stock market will suffer a one-day drop as big as the one that happened 29 years ago this week. It was on Oct. 19, 1987, that the Dow Jones Industrial Average plummeted 22.6% in what has been called Black Monday.

To put that in perspective, consider that some currently are forecasting a replay of the dot-com bust, which would mean a drop of 22% over the next couple of months. That’s peanuts: What happened 29 years ago this week was that big of a decline in one day.

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