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Peter Mallouk points out that the S&P 500 is now more concentrated in a single stock than ever before, with Nvidia accounting for more than 8 percent of the index.
This level of concentration is highlighted as a significant development in the structure of the U.S. equity market.
Mallouk has recently commented on other key market shifts. He noted that U.S. annual interest payments have surpassed national defense spending. In a separate observation, Mallouk said that markets are driven by earnings, innovation, and growth, rather than politics.