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by cachius6 hours ago |
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upvoteby markoman3 hours ago|
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Jane Street made it's way into today's Wall St Journal for its quantitative prowess and hiring of Math PhD's. What was stunning to hear was that their 2nd quarter profits were a record $10.3 billion, nearly double that of Goldman Sachs and Morgan Stanley (much larger firms).
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upvoteby RugnirViking6 hours ago|
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They're a trading firm that hires really clever people to use math to trade. Their strategies are, presumably, very complicated and ever changing, and secrecy about them is the point - you get bigger margins for longer if people don't learn about your 'one weird trick' (that and also that there is presumably another side to your trades losing out on upside, and they might not be best pleased to learn about it.
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upvoteby rudedogg6 hours ago|
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> really clever people

Sam Bankman-Fried and his League of Legend rankings would like a word

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upvoteby affyboi3 hours ago|
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They’re a market maker
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upvoteby morkalork6 hours ago|
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Print money?
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upvoteby andor5 hours ago|
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Governments print money, high frequency traders extract money. They would say that they provide liquidity to the market as a service.
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upvoteby morkalork4 hours ago|
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hn: come for the tech news, stay for the pedantry
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upvoteby phplovesong6 hours ago|
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[flagged]
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upvoteby monooso5 hours ago|
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This doesn't seem quite as clear-cut as you're making out.

The Securities and Exchange Board of India (SEBI) have accused Jane Street (JS) of market manipulation, JS claims it was legitimate arbitrage, and the case is still ongoing [1].

As I understand it, the ban only applied to Indian securities (not Asian markets as a whole), and was lifted back in July 2025 after JS paid ~$560 million (the alleged ill-gotten gains) into an escrow fund. They don't appear to have resumed trading, though [2].

[1]: https://www.reuters.com/legal/government/us-trading-firm-jan...

[2]: https://www.reuters.com/sustainability/boards-policy-regulat...

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upvoteby hatred6 hours ago|
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The above might be too far-fetched as it only applied to India? They did pay a fine to the regulator and resumed trading (might not be the same strategy though)

To OP’s original question, they made $20B last year and have a niche in several financial products

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upvoteby phplovesong6 hours ago|
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Yes, the fraud was done in india. Why does that matter?
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upvoteby fn-mote3 hours ago|
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“Banned from the Asian markets” was the original claim. The actual fact is: banned from Indian markets, with the ban now lifted.
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upvoteby wbl5 hours ago|
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Trading the underlying to offset your derivative position isn't fraud.
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upvoteby vovavili5 hours ago|
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>Janestreet PR team is downvoting. Like always, radio silence and just downvotes.

You're being downvoted for having a needlessly confrontational underinformed hot take on a quant trading firm that is essentially a market maker.

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