Global Pension Funds – Cutting US Equities Over AI Concentration Risk

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## Overview Global pension funds are cutting exposure to US equities over concerns about AI-driven market concentration risk, pushing for diversification amid mounting worries over 'stretched' valuations (FT, October 5, 2026). ## Context This move by institutional investors follows a broader pattern of concern about AI bubble dynamics and concentration risk in US equity markets, where a handful of AI-related mega-cap stocks have driven a disproportionate share of index gains. It echoes related institutional skepticism documented in critiques of hyperscaler capex spending and warnings from figures like Michael Burry about AI infrastructure financing. ## Why It Matters Pension fund reallocation away from US equities represents a significant institutional validation of concerns previously voiced primarily by short-sellers and contrarian analysts. Given pension funds' scale and long investment horizons, sustained reallocation could meaningfully affect US equity valuations, particularly for AI-exposed mega-caps, and accelerate capital flows toward other markets (Asia, Europe) or asset classes. ## Related Developments This connects to broader themes including the AI bubble sustainability debate, Wells Fargo's S&P 500 target cut on AI tech risk, and the push by sophisticated institutional investors to diversify away from concentrated AI exposure.