From Motley Fool:

There’s no sugarcoating it — it’s been an utter beatdown for investors over the past three weeks.

Since the major U.S. stock indexes hit their all-time closing highs, they’ve shed more than 25% of their value in a span of just 16 trading sessions (about 3.5 weeks, including the Presidents Day holiday). That’s by far the quickest the market has pushed into bear market territory, easily surpassing the 35 trading days it took during the Great Depression crash.

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