Jane Street hit with $15bn loss after Situational Awareness meltdown
Jane Street suffers $15B hit after meltdown at Situational Awareness
Jane Street, the quantitative trading firm, suffered a $15 billion loss following a market meltdown at Situational Awareness, a company it had invested in. The loss, reported by the Financial Times, highlights the risks of concentrated bets in volatile markets. The incident has raised questions about Jane Street's risk management and the broader implications for the trading industry.
Jane Street has paid up large to avoid its numbers leaking out.
- choult
- jxf
The real headline is buried in the article:
> Jane Street has generated more than $40bn in net trading revenues in the year to Friday, even accounting for the July loss, which exceeds its entire haul for 2025, according to one of the people familiar with the matter.
This would make JS one of the most profitable trading firms of all time even with the loss.
- fancyfredbot
Original headline is "Jane Street suffers $15bn loss in July market ructions".
HN guidelines do request use of original title and in this specific case the change of title is misleading by implying that situational awareness directly caused losses at JS.
In the text it says "the US trading firm was wrongfooted during last month’s market ructions including the meltdown at AI-focused hedge fund Situational Awareness" so while SA is mentioned the implications of a direct link to the losses is less strong.
edit: more detail in https://www.reuters.com/business/finance/jane-street-took-15... confirms some losses linked directly to SA and some losses to their own positions.
- otterley
They're still up $25B for the year, so it's hard to feel bad for them :-)
On a more serious note, Jane Street has hired some very impressive technical talent. I'd work for them, myself, if I didn't have to relocate to Chicago.
- tolugenius
Archive link (https://archive.is/20260814213548/https://www.ft.com/content...)
Pretty short so I imagine more details and analysis are forthcoming.
- JumpCrisscross
“By our calculations, Jane Street ponied up a one-off $200mn to do the deal and then locked in a further $200mn of costs per annum, at least in part, to avoid us gawping at their numbers every quarter. Wowsers” [1].
[1] https://www.ft.com/content/28a51284-98cc-4767-a306-0540d2656...
- int32_64
Ever since the infamous work of some of their alumni I have wondered what the culture of JS is actually like.
- pjg
Seems like it was banned, at least temporarily from trading in India: https://www.bbc.com/news/articles/c5y0zgrevl1o