AI Unwind Triggers Broad Hedge Fund Losses

Global hedge funds suffered significant losses during the week as investors reduced exposure to artificial intelligence-related equities, with Asia-focused managers experiencing the sharpest declines.

According to Goldman Sachs’ prime brokerage unit, global fundamental long-short equity funds lost money on every trading day during the week through October 15. Their combined weekly losses reached 2.9%, reducing recent gains, although the strategy remained positive by 14.3% for the year to date.

The selloff reflected growing uncertainty over whether the substantial spending on AI infrastructure and technology will generate sufficient returns in the near term. Persistent inflation has added to concerns by keeping borrowing costs elevated and increasing the risk of further monetary tightening.

US equities ended Friday sharply lower, with AI-related companies including CoreWeave and Broadcom under renewed pressure. Rising oil prices also unsettled investors heading into the weekend.

Fund Managers Continue to Reduce AI Exposure

Goldman Sachs reported that global AI stocks had been net sold by long-short fund managers for six consecutive sessions. The selling reflected continued efforts to reduce risk, with long positions being sold at a faster pace than short positions were being closed.

In a Friday client note, Goldman said global equity de-grossing activity on Thursday was approximately half the level recorded on Wednesday. De-grossing includes both the sale of long positions and the covering of short positions, indicating a broader reduction in portfolio exposure.

The declines extended beyond fundamental stock pickers. On Thursday, global systematic long-short managers and multi-strategy funds each fell by approximately 1%, while technology-focused hedge funds lost 2.0%.

The breadth of the losses suggests that the market adjustment affected multiple investment approaches rather than remaining confined to a narrow group of technology-focused portfolios.

Asia’s Semiconductor Markets Bear the Brunt

Markets with significant semiconductor exposure experienced some of the steepest declines. South Korea’s KOSPI fell 8% on Thursday, closing at a six-month low, while Taiwan’s stock market declined by more than 3%.

Asia-focused stock pickers were particularly exposed to the reversal. Goldman Sachs data showed that these managers lost 6.8% during the first half of October, erasing more than half of the gains accumulated since their late-June peak, when returns had exceeded 40% for the year.

The concentration of losses in semiconductor-heavy markets highlights the sensitivity of technology-related portfolios to changes in expectations for AI demand, investment spending and financing costs.

The pressure has also extended into credit markets. CoreWeave, a data center operator closely associated with AI infrastructure, saw its bonds sell off sharply during the week, pushing yields above 15%. The move reflects heightened investor concern surrounding financing conditions and the risks associated with capital-intensive AI businesses.

Inflation Adds to Market Volatility

Hotter-than-expected US inflation data contributed to expectations that interest rates could rise further, adding another source of pressure on AI and semiconductor stocks.

Higher borrowing costs can weigh on companies that require substantial upfront investment while depending on future growth to justify their valuations. For AI infrastructure businesses, the combination of heavy capital expenditure, financing needs and uncertainty about near-term returns has become a key market concern.

Goldman Sachs also highlighted an unusual pattern in the breadth of hedge fund losses. The firm said that from the COVID-19 period through the end of 2025, three broad investment strategies had never simultaneously declined by more than 80 basis points in a single day. That threshold was breached three times in 2026: February 4, July 28 and October 15.

The observation underscores the extent to which recent market stress has spread across investment strategies.

What Investors Should Watch Next

The durability of the AI investment cycle, the direction of inflation and the outlook for interest rates will remain central to market sentiment. Investors will also be watching whether hedge funds resume accumulating technology stocks or continue reducing exposure as valuations and financing conditions come under scrutiny.

For Asia-focused managers, the key question is whether recent losses represent a temporary correction after strong gains or a more sustained reassessment of semiconductor and AI-related investments.

Credit conditions will provide another important signal. Continued pressure on AI infrastructure debt could raise concerns about financing costs and the sustainability of capital-intensive expansion plans. Until visibility improves on returns from AI spending and the interest rate outlook, hedge fund positioning may remain sensitive to further changes in risk appetite.