Goldman Sachs released a “Hedge Fund Trend Monitor” that shows over 1,000 U.S. registered funds now channel $4.6tn of long and short positions into AI‑related stocks. The data, though delayed, reveals a sharp shift toward high‑profile tech names.

Eight of the ten most popular holdings sit in AI firms, underscoring a broad industry tilt. Hedge funds have also leaned more heavily on ETFs, with State Street and BlackRock S&P 500 funds accounting for 4.9% of total long books— the largest share since 2008.

This concentration raises crowding concerns as fund managers balance gains from long bets against losses in short positions. The move toward passive beta tools signals a preference for low‑cost exposure amid a market rally.

Investors should watch for valuation pressure in AI stocks and the risk of synchronized sell‑offs if the sector falters, as heavy ETF weighting could amplify swings.