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US mutual funds underweight AI equities

Reported by Opalesque
Sep 22, 2026· 2 min read
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Key Takeaways
  • • Large-cap active mutual funds are underweighting AI-related equities by approximately 107 basis points relative to their benchmarks, according to Goldman Sachs analysis of 504 actively managed funds.
  • • This positioning gap is creating a performance drag for active mutual fund managers who are missing exposure to a significant market segment driving equity returns.
  • • The underweight reflects a structural disconnect between benchmark composition (increasingly AI-heavy) and active manager deployment of capital in the AI equity space.
Summary
US mutual fund managers are facing a meaningful performance headwind as they maintain underweight positions in artificial intelligence-related equities relative to their benchmarks. According to Goldman Sachs analysis covering 504 actively managed large-cap mutual funds, the aggregate underweight position stands at approximately 107 basis points—a material gap in a market where AI stocks have become a dominant performance driver.

This positioning gap represents a strategic challenge for active managers tasked with delivering benchmark-relative returns. As benchmark indices have become increasingly concentrated in AI-related holdings, many active funds have failed to match that exposure, creating a drag on relative performance. The 107 basis point underweight is substantial enough to materially impact fund returns, particularly in market environments where AI equities are outperforming broader market averages.

The underweighting likely reflects a combination of factors including valuation concerns around AI stocks, risk management decisions to reduce concentration risk, and the challenge active managers face in identifying which AI-related companies will deliver sustainable returns. Regardless of underlying rationale, the positioning gap underscores a divergence between benchmark construction and active manager conviction that is translating into measurable performance costs for fund shareholders.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Opalesque US mutual funds underweight AI equities