Goldman Sachs says Asia-based hedge funds posted record losses in July, a sharp reversal for managers that had been among the strongest performers earlier in the year. The setback followed a steep selloff in technology shares, which quickly undermined positions built around market momentum.

According to the report, the downturn wiped out roughly 21 percentage points of gains in just a matter of days. Funds that had benefited from riding fast-rising stocks were suddenly hit as sentiment turned, showing how quickly crowded trades can unravel when leadership in the market changes.

The losses underscore the risks tied to momentum-driven investing, especially in sectors such as tech where price swings can be intense. Strategies that look highly effective during a rally can become vulnerable when markets reverse and investors rush to cut exposure at the same time.

For Asia-focused hedge funds, July's results stand out as a warning about volatility as much as performance. Goldman Sachs' assessment points to a broader lesson for investors: strong gains can fade quickly when portfolios are heavily exposed to the same market trend.