If you're a long-term investor, you'll almost certainly experience a bear market from time to time. Bear markets occur when the Dow Jones Industrial Average drops 20% or more. But not all market drops are that severe. The market can dip 5% or more at least three times a year on average. You can expect a drop of 10% or more ? known as a correction ? about once a year. And the bear reappears every three to four years on average.*

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