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Why MP Materials Stock Jumped 10% Today

The S&P is mixing things up, to MP Materials' benefit.

By Rich Smith Updated Jul 25, 2022 at 2:04PM EST

Key Points

  • MP Materials doesn't report earnings until next week, but it's stock is rising already today.
  • The S&P 500 is adding the stock to its MidCap 400 index of companies, which will force ETFs and mutual funds to buy the stock in a few days.
  • Investors today are front-running those purchases, and hoping to score a quick profit.

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