Key Takeaways
- • Rokos Capital Management and Brevan Howard Asset Management reported losses in July 2026 following a severe selloff in AI-related stocks, demonstrating that macro hedge fund strategies incorporating equity overlays were not immune to technology sector volatility.
- • Rokos Capital Management, which oversees approximately $22 billion in assets and delivered a 21% return in 2025, declined 5.2% in August, reducing year-to-date gains to just over 14% despite its strong historical performance record (31% gain in 2023).
- • Both funds utilized tactical equity overlays and options positioning as secondary exposure to equities, a strategy that amplified losses when AI stocks reversed sharply in July—turning what was intended as a complementary positioning into a significant portfolio liability.
- • The July AI stock rout inflicted widespread damage across the hedge fund landscape, with specialized AI funds suffering severe losses: Situational Awareness's AI-focused fund dropped 67%, Whale Rock Capital Management's tech fund fell 21.7%, and Altimeter Capital's AI fund declined 11%.
- • Brevan Howard, founded in 2002 by Alan Howard and where Rokos served as co-founder before departing, has delivered mixed results throughout 2026 amid macro volatility, contrasting with Rokos Capital's stronger year-to-date performance trajectory.
Summary
The July 2026 selloff in artificial intelligence stocks exposed a structural vulnerability in macro hedge fund strategies that had incorporated equity market exposure through tactical overlays and options positioning. Rokos Capital Management and Brevan Howard Asset Management, two of London's most prominent global macro hedge funds, posted losses during the period as their secondary equity exposures became significant drags on portfolios designed to insulate investors from exactly this type of directional equity volatility.
Rokos Capital Management, managing approximately $22 billion in assets, proved particularly exposed to the correction. The fund posted a 5.2% decline in August as AI stock volatility persisted, reducing its year-to-date gains to just over 14% through that month. While Rokos Capital's historical track record remains strong—the fund delivered a 21% return in 2025 and a 31% gain in 2023—the recent losses underscore the challenge that even experienced macro managers face when attempting to capture equity market upside without accepting corresponding downside risk.
Brevan Howard, the older of the two firms founded in 2002 by Alan Howard, experienced its own difficulties navigating 2026's macro volatility. Chris Rokos, Brevan Howard's co-founder, departed to establish Rokos Capital Management and has since outperformed his former firm amid the challenging market environment. The structural problem both firms encountered stemmed from their use of options strategies and tactical overlays to gain secondary exposure to equities—a mechanism intended to enhance returns during favorable periods but that amplified losses when AI stocks reversed sharply.
The damage extended beyond these two established macro managers. Situational Awareness's AI-focused fund suffered a staggering 67% decline in July, while Whale Rock Capital Management's tech fund fell 21.7% and Altimeter Capital's AI fund declined 11%. The broader hedge fund industry recorded average losses of 1.1% in July amid rising oil prices and AI stock volatility, marking the worst period for the sector since 2008. These losses illustrate a critical lesson: even tactical equity overlays designed as secondary positions can become material portfolio risks when market dislocations reverse years of accumulated gains in concentrated technology positions.
Rokos Capital Management, managing approximately $22 billion in assets, proved particularly exposed to the correction. The fund posted a 5.2% decline in August as AI stock volatility persisted, reducing its year-to-date gains to just over 14% through that month. While Rokos Capital's historical track record remains strong—the fund delivered a 21% return in 2025 and a 31% gain in 2023—the recent losses underscore the challenge that even experienced macro managers face when attempting to capture equity market upside without accepting corresponding downside risk.
Brevan Howard, the older of the two firms founded in 2002 by Alan Howard, experienced its own difficulties navigating 2026's macro volatility. Chris Rokos, Brevan Howard's co-founder, departed to establish Rokos Capital Management and has since outperformed his former firm amid the challenging market environment. The structural problem both firms encountered stemmed from their use of options strategies and tactical overlays to gain secondary exposure to equities—a mechanism intended to enhance returns during favorable periods but that amplified losses when AI stocks reversed sharply.
The damage extended beyond these two established macro managers. Situational Awareness's AI-focused fund suffered a staggering 67% decline in July, while Whale Rock Capital Management's tech fund fell 21.7% and Altimeter Capital's AI fund declined 11%. The broader hedge fund industry recorded average losses of 1.1% in July amid rising oil prices and AI stock volatility, marking the worst period for the sector since 2008. These losses illustrate a critical lesson: even tactical equity overlays designed as secondary positions can become material portfolio risks when market dislocations reverse years of accumulated gains in concentrated technology positions.
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