Jane Street Posts $15 Billion July Loss as AI Fund Slump Ends 10-Year Monthly Winning Streak
Updated
Updated · eFinancialCareers · Aug 17
Jane Street Posts $15 Billion July Loss as AI Fund Slump Ends 10-Year Monthly Winning Streak
3 articles · Updated · eFinancialCareers · Aug 17
Summary
$15 billion of July losses marked Jane Street’s first monthly slump in about a decade, a rare setback for the market maker after years of record gains.
Situational Awareness’ AI-driven swoon and Jane Street’s wrong-way bets in Asian equities drove the hit, with the hedge fund’s margin calls forcing a sale of part of its public equity book to Citadel.
More than $40 billion of net trading revenue so far this year still exceeds all of 2025, but partner Turner Batty said desks have cut a significant portion of risk in the areas that lost money.
The setback came as Jane Street was refinancing its debt load through a $14.6 billion bond sale, after telling investors the Situational Awareness drawdown left its stake flat for the year though still profitable over the life of the investment.