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Three stocks now make up 21% of the S&P 500, the highest concentration ever recorded.

Market News
07 Oct 2026
24/7 Wall Street
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Bullish
Three stocks now make up 21% of the S&P 500, the highest concentration ever recorded.

NVIDIA, Apple, and Microsoft now account for over 21% of the S&P 500 index, marking the highest three-stock concentration in its history, surpassing the 1980s peak of 13.4%. This concentration reflects strong earnings and growth, especially driven by AI-related spending, with NVIDIA up 28.58% and Apple up 23.06% year to date. While these companies are highly profitable, this level of concentration means index fund investors have significant exposure to just three tech giants, raising concerns about diversification. Investors seeking less concentration might consider capped ETFs that limit individual stock weightings.

Nvidia's market cap on Pluang stands at $5.78 trillion as of Oct 07, 2026 18:12 WIB, highlighting its massive scale among the top three S&P 500 stocks. Apple shares are currently priced at USD 335.81 with a 0.65% gain on the day, while Microsoft trades at USD 527.49, down 0.34% as of the same time. This data underscores the significant market presence these three tech giants hold, coinciding with the record 21% concentration in the S&P 500 index.

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