Mag 7 Concentration in S&P 500 Reaches New High

As of mid-2025 over 33% of the S&P 500 is now concentrated in the Mag 7 (based on market cap). Investing in the S&P 500 can feel diversified, but that’s not always the case.

As of mid-2025 over 33% of the S&P 500 is now concentrated in the Mag 7 (based on market cap). Investing in the S&P 500 can feel diversified, but that’s not always the case.