While the S&P 500 Index appeared relatively stable in July, dipping just 0.1 per cent and remaining near record highs, underlying market dynamics revealed significant turbulence. Momentum strategies, particularly those synonymous with artificial intelligence, experienced one of their most severe downturns on record. Goldman Sachs estimates show its high-beta basket fell 41 per cent, its technology basket 48 per cent, and its AI basket 38 per cent. Even after a rebound, high-beta momentum finished July down 28 per cent, its worst month on record, contrasting with an index excluding major AI enablers reaching a new peak.
The AI trade, while compelling, had become dangerously overcrowded, attracting substantial capital from hedge funds, systematic strategies, and multi-manager platforms into similar semiconductor, memory, and AI infrastructure winners. When signals flipped, models responded to volatility and trend signals, forcing sales regardless of price. A brutal forced liquidation followed, with hedge funds recording one of their largest gross exposure reductions since 2020. Market stability returned after Citadel’s acquisition of a substantial portion of the Situational Awareness fund’s portfolio, which triggered a record one-day rally as forced selling reversed.
However, the market turbulence is far from over. This positioning shock is now colliding with the persistent threat of a sharply rising discount rate. The 30-year Treasury yield ended July at 5.27 per cent, up 36 basis points, with its real yield reaching 3.03 per cent – a 15-year high. This pressure on capital costs stems from Washington’s deficits and hyperscalers raising vast sums for AI infrastructure. Complicating matters further is the US Federal Reserve’s new approach under Chairman Kevin Warsh, offering minimal forward guidance and potentially increasing market uncertainty. Ironically, the AI boom contributes to the very discount rate that depresses valuations of its leading companies. This environment demands a shift from indiscriminate AI spending to a focus on idiosyncratic opportunities, as the long bond reasserts itself as the market’s disciplinarian.
