Hedge funds have endured one of their toughest trading stretches in almost a year as crowded artificial intelligence and technology positions reversed amid elevated market volatility.
Quantitative investment firms suffered the sharpest declines, while traditional equity managers also cut exposure to AI-linked trades as investors reduced risk across global markets.
Quant Strategies Lose Momentum
Algorithm-driven hedge funds have surrendered around one-quarter of their gains for 2026, with year-to-date returns falling from 14.4% to 10.8%.
The losses were driven largely by positions involving U.S. equities, developed Asian markets and European stocks, all of which experienced significant price swings.
Semiconductor Volatility Adds Pressure
Trading conditions became increasingly difficult as semiconductor stocks experienced sharp fluctuations during late June and early July. High levels of leverage among investors in South Korea further amplified market moves.
Quantitative managers represented roughly 10% of the largest hedge funds globally in 2025, underscoring their growing role in financial markets.
Regulators Highlight Financial Stability Concerns
Authorities including the Bank of England, the Bank of Japan and the Bank for International Settlements have continued to warn that elevated asset valuations and expanding hedge fund participation could increase financial market volatility.
AI Positions Unwind Across the Industry
Fundamental hedge funds declined 2.2% over the same period as previously popular AI investments lost momentum.
Portfolio managers “aggressively” reduced AI-related holdings, driving hedge fund leverage to its lowest level in the past year as firms sought to lower overall market exposure.