NEW YORK — Jane Street posted roughly $15 billion in losses in July, ending a streak of profitable months stretching back nearly a decade. The damage came from two sources: the firm's stake in AI-focused hedge fund Situational Awareness, which faced margin calls after its own bets soured, and wrong-way positions in Asian equity markets.
"July was a bad month," Turner Batty, a Jane Street partner, said in an internal note. The brevity of that acknowledgment understates the scale. Fifteen billion dollars in a single month is a loss few trading firms on Wall Street — or anywhere — could absorb without existential consequences. Jane Street absorbed it.
Situational Awareness ran into serious trouble in July when AI-related positions moved against it, triggering margin calls — demands from brokers that the fund put up additional collateral to cover losing trades. The fund struck a last-minute deal with Ken Griffin's Citadel to sell off a large portion of its public equity book. That transaction helped Situational Awareness stabilize, but the episode drained its assets before the recovery took hold.
Jane Street invests directly in Situational Awareness and also holds direct stakes in AI companies. The firm said its Situational Awareness position ended flat on the year following the drawdown, but the investment remains positive over its full holding period.
Despite the July loss, Jane Street's year-to-date numbers are extraordinary by any measure. The firm has generated more than $40 billion in net trading revenue through this point in 2026 — already surpassing the $39.6 billion it posted for all of 2025, which itself set a Wall Street record and topped rivals including Goldman Sachs and JPMorgan Chase.
"Despite the large year-to-date increase in trading capital, the recency of these losses has caused us to locally be more selective about risk," Batty said in the same internal note. "We've closed a significant portion of our risk in the specific areas we lost on in July, and have also reduced risk-taking in other strategies."
The losses landed at a delicate moment. Jane Street was simultaneously preparing to issue $14.6 billion in bonds this week to refinance its existing debt. The firm disclosed the Situational Awareness impact to investors as part of that process. Three bonds were issued in the transaction, with Pacific Investment Management Co. Capital Group and Fidelity among the buyers, according to filings. The proceeds fund technology infrastructure and an expansion of Jane Street's trading strategies.
Jane Street's core business is market making — executing thousands of trades within milliseconds across equities, options, ETFs and other instruments. That business generates the bulk of its trading revenue and has run profitably through every kind of market environment for roughly a decade. The July loss was driven by its investment portfolio, not its market-making engine.
The firm has also invested directly in some of AI's highest-profile private companies, including Anthropic PBC and CoreWeave Inc. Those stakes contributed to Jane Street's record 2025 figures and position the firm as one of Wall Street's most concentrated private-market bettors on artificial intelligence.
Situational Awareness's near-collapse illustrates the risk embedded in concentrated AI positions funded with leverage. When the fund faced margin calls, it had to sell assets fast enough to satisfy creditors — and the speed of that forced selling moved prices against it before Citadel stepped in. Jane Street, as a major investor, felt the mark-to-market impact directly.
Losing $15 billion in a month when you've made more than $40 billion is painful but survivable. Jane Street's response — closing the specific losing positions and trimming risk in adjacent strategies — shows a firm managing drawdowns rather than being overwhelmed by them. The $14.6 billion debt refinancing closing this week, with blue-chip institutional buyers participating, confirms that bond markets reached the same conclusion.
