Tiger Global's flagship hedge fund declined 8.5% in October, leaving the fund roughly flat for the year as market concerns over AI investments weighed heavily on stock-picking hedge funds. Whale Rock's flagship fund dropped about 8%, reducing its year-to-date gain to approximately 34%. D1 Capital Partners' equity portfolio lost 4.4%, cutting its year-to-date return to 18.8%, while Atreides Management's flagship fund fell 9.5% but remains up about 43% for the year. Coatue Management stood out as one of the few stock-picking funds to hold steady, posting a modest 0.2% monthly gain. All firms declined to comment on the performance figures.