Historically, 20% of bear markets occur roughly once every four years.
Investors with long-term strategies should resist the urge to sell after stocks have declined.
Continuing to dollar-cost average into 401(k) plans can take advantage of low share prices before a recovery.
Bear markets often show up out of the blue and without warning. Consider the current correction we're seeing in semiconductor stocks. Both the VanEck Semiconductor ETF and the iShares Semiconductor ETF are roughly 20% off their highs set only around a month ago. A lot of investors thought that artificial-intelligence-driven stocks would keep rising indefinitely. But they're vulnerable to pullbacks like anything else.
Historically, 20% bear markets in the S&P 500 (SNPINDEX: ^GSPC) happen about once every four years. Losses of 30% or more have occurred around once every 10 years. Every single time, the index has gone on to eventually set a new high. Whether your personal portfolio establishes new highs, however, depends on your discipline and what you do when stock prices are falling.
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Take these two historic bear markets:
In both cases, investors who sold low and stayed on the sidelines permanently damaged their long-term returns. Long-term investing involves staying invested through market declines since you have years to recover, in theory. But if you act during those times, you're very likely to come out behind.
On the other hand, staying invested AND continuing to make scheduled periodic investments, such as into a 401(k) plan, can actually help you come out ahead during a bear market.
That's because you're buying shares at lower prices than you might see again after the recovery has begun. Once a new high is eventually established, you would, in theory, recover everything you'd lost. But you'd also see gains on all of those purchases you made during the bear market.
Investors who resist the urge to take action are often the ones who do best in the end. Bear markets are scary. But if you maintain composure during and focus on your long-term goals, they can be situations to take advantage of instead.
David Dierking has positions in iShares Trust-iShares Semiconductor ETF. The Motley Fool has positions in and recommends iShares Trust-iShares Semiconductor ETF. The Motley Fool has a disclosure policy.