The number of ‘negative-beta’ stocks in the S&P 500 just hit a new record high. What that means for investors.

The number of S&P 500 stocks moving in opposite directions to the index on a given day reached a record level, according to market data. Negative-beta stocks—those that tend to move inversely to the broader market—have increased in the index. This pattern indicates higher volatility among individual stocks than the overall index performance suggests.

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