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Big Tech’s ‘Lag 7’ is putting the S&P 500 — and your index fund — at risk

By MarketWatch · 2026-02-24
Big Tech’s ‘Lag 7’ is putting the S&P 500 — and your index fund — at risk
Why it matters: Investors need to be aware of the outsized influence of a few tech stocks on their index funds and consider diversifying to mitigate risk.
The concentration of the S&P 500's performance in the "Magnificent Seven" tech stocks, now dubbed the "Lag 7", poses a significant risk to the overall market and index fund investors. This over-reliance on a small group of companies makes portfolios vulnerable to sector-specific downturns and potentially masks broader economic weaknesses.

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