AI基金Situational Awareness回撤拖累Jane Street，7月损失达150亿美元

The Odaily Planet Daily reports that Wall Street quantitative trading giant Jane Street suffered losses of approximately $15 billion in the July market selloff due to its investments in the AI-themed hedge fund Situational Awareness and other technology stocks.

According to sources familiar with the matter, despite the significant drawdown in July, Jane Street's trading revenue so far this year has exceeded $40 billion—far surpassing major global banks and other market makers, and already exceeding its full-year 2025 trading revenue of $39.6 billion.

In an internal memo to employees, Jane Street confirmed that July was a "rough month" for the firm. The company stated that its investment in the AI-focused hedge fund Situational Awareness—which had expanded positions earlier in the year following strong performance—experienced a sharp drawdown during the AI stock rout, bringing the fund's returns on Jane Street's investment back to roughly breakeven for the year, though it remains profitable relative to the initial investment.

Situational Awareness, founded by former OpenAI researcher Leopold Aschenbrenner, had drawn market attention for its heavy concentration in AI-related stocks. After the sharp correction in the AI sector in July, the fund was forced to sell the majority of its stock positions to Citadel, the hedge fund run by billionaire Ken Griffin, after triggering margin requirements.

Jane Street noted that the losses also stemmed from its long positions in Asian non-AI stocks, which had performed strongly earlier in the year. The company said that many large memory and semiconductor stocks fell by roughly 50% in July, causing a drawdown in its previously well-performing trading portfolio. (Reuters)