The S&P 500 index is undergoing significant changes in its composition, with AI infrastructure companies gaining seats while traditional sectors like beer, fries, and housing lose theirs. This reshuffle reflects the evolving nature of the U.S. economy and affects the index funds and 401(k) plans held by millions of investors. The index has added 11 companies and removed 11 so far in 2026, with additional changes scheduled for September. The selection process is primarily based on market capitalization, ensuring that the index mirrors the current corporate landscape.
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