Quant Long-Short Funds Drop 3.1% in Five Days, Worst Performance Since December 2023
Taylor Wilson
Goldman Sachs reports that systematic long-short funds fell 3.1% over five trading days — a negative 3.3 standard-deviation event, the worst five-day run since December 2023. Markets are now watching whether the drawdown triggers a broader deleveraging chain.
How bad is the drop, and how rare?
Goldman Sachs strategist Kartik Singhal reported Monday evening that systematic long-short funds — funds that rely entirely on quantitative models to decide what to buy and sell — fell a cumulative 3.1% over five trading days.
This means → the drawdown sits at negative 3.3 standard deviations on the five-year return distribution, making it the worst five-day stretch since December 2023. In plain terms = over the past five years, a worse five-day run barely exists.
On June 29 alone, the single-day loss hit 1.0% — unusually large for a strategy class built to deliver steady excess returns.
Where did the losses hit?
Losses spanned every major equity market, with North America, emerging-market Asia, and Europe showing the steepest declines.
This reflects a global, strategy-wide drawdown, not a problem confined to one region.
Goldman's report notes these funds posted strong gains in early 2026, then suffered a sharp reversal around mid-year. In plain terms = much of the first-half profit was given back in a matter of days.
Why did quant funds blow up together?
Systematic long-short strategies rely on quantitative models to drive positioning. This means → when price signals turn noisy or cross-asset correlations suddenly shift, the models cannot adapt fast enough. Funds absorb losses passively until risk limits force them to cut exposure.
In plain terms = these funds trade by the rules; when the market stops following the rules, they are often the last to react.
The closest historical precedent is August 2007, when concentrated quant-fund unwinds triggered cascading market shocks. Whether this round of collective losses escalates into broader deleveraging remains the market's key open question.
Content is for reference only, not financial advice.