The S&P 500 index (SNPINDEX: ^GSPC) is up about 12% in 2026, and the Vanguard S&P 500 ETF (NYSEMKT: VOO) has delivered annualized returns of about 15.3% for the past 10 years. But despite this long winning streak on Wall Street, many investors are feeling anxious. Whether that anxiety is focused on artificial intelligence, higher bond yields, high stock valuations, stubborn inflation, or just a vague sense that what goes up must come down, some are seeing evidence all around that we're about to have a stock market crash. Here's the thing: No one knows if the stock market will go up or down on any given day. The future is unknowable. But we do know that there's one big move that every investor should try to make during a bear market.
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