7 ms·

What does JaneStreet do besides sponsoring nerdy Youtube channels and writing UI libraries?

by cachius 2mo ago

phplovesong 2mo ago
[flagged]
- hatred 2mo ago
  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
  - phplovesong 2mo ago
    Yes, the fraud was done in india. Why does that matter?
    - fn-mote 2mo ago
      “Banned from the Asian markets” was the original claim. The actual fact is: banned from Indian markets, with the ban now lifted.
      - phplovesong 2mo ago
        Sure, so "its all ok now" seems to be the goto here. Who knows other shady stuff they had done / are doing. A big wart on them, and the entire ocaml ecosystem.
- wbl 2mo ago
  Trading the underlying to offset your derivative position isn't fraud.
- monooso 2mo ago
  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-jane-street-files-appeal-against-india-markets-regulator-2025-09-03 https://www.reuters.com/legal/government/us-trading-firm-jan... [2]: https://www.reuters.com/sustainability/boards-policy-regulation/jane-street-gets-approval-resume-trading-india-after-567-million-deposit-2025-07-21 https://www.reuters.com/sustainability/boards-policy-regulat...
- vovavili 2mo ago
  >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.
morkalork 2mo ago
Print money?
- andor 2mo ago
  Governments print money, high frequency traders extract money. They would say that they provide liquidity to the market as a service.
  - morkalork 2mo ago
    hn: come for the tech news, stay for the pedantry
RugnirViking 2mo ago
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.
- rudedogg 2mo ago
  > really clever people Sam Bankman-Fried and his League of Legend rankings would like a word
- keepupnow 2mo ago
  One trick is buy low sell high, apparently only a few know about this.
affyboi 2mo ago
They’re a market maker
markoman 2mo ago
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).
- j_walter 2mo ago
  They made money through extreme manipulation of the Indian stock market...when working with a market that has 422X leverage through derivatives its much easier to make money. https://www.youtube.com/watch?v=VhqosmgfGR0 https://www.youtube.com/watch?v=VhqosmgfGR0
  - erikig 2mo ago
    Market-making in a market that is highly speculative and illiquid isn’t the same as market manipulation though.
smfjaw 2mo ago
manipulate foreign equity markets

What does JaneStreet do besides sponsoring nerdy Youtube channels and writing UI libraries?

by cachius 2mo ago

What does JaneStreet do besides sponsoring nerdy Youtube channels and writing UI libraries?

phplovesong 2mo ago

[flagged]

hatred 2mo ago
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
- phplovesong 2mo ago
  Yes, the fraud was done in india. Why does that matter?
  - fn-mote 2mo ago
    “Banned from the Asian markets” was the original claim. The actual fact is: banned from Indian markets, with the ban now lifted.
    - phplovesong 2mo ago
      Sure, so "its all ok now" seems to be the goto here. Who knows other shady stuff they had done / are doing. A big wart on them, and the entire ocaml ecosystem.
wbl 2mo ago
Trading the underlying to offset your derivative position isn't fraud.
monooso 2mo ago
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-jane-street-files-appeal-against-india-markets-regulator-2025-09-03 https://www.reuters.com/legal/government/us-trading-firm-jan... [2]: https://www.reuters.com/sustainability/boards-policy-regulation/jane-street-gets-approval-resume-trading-india-after-567-million-deposit-2025-07-21 https://www.reuters.com/sustainability/boards-policy-regulat...
vovavili 2mo ago
>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.

morkalork 2mo ago

Print money?

andor 2mo ago
Governments print money, high frequency traders extract money. They would say that they provide liquidity to the market as a service.
- morkalork 2mo ago
  hn: come for the tech news, stay for the pedantry

RugnirViking 2mo ago

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.

rudedogg 2mo ago
> really clever people Sam Bankman-Fried and his League of Legend rankings would like a word
keepupnow 2mo ago
One trick is buy low sell high, apparently only a few know about this.

affyboi 2mo ago

They’re a market maker

markoman 2mo ago

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).

j_walter 2mo ago
They made money through extreme manipulation of the Indian stock market...when working with a market that has 422X leverage through derivatives its much easier to make money. https://www.youtube.com/watch?v=VhqosmgfGR0 https://www.youtube.com/watch?v=VhqosmgfGR0
- erikig 2mo ago
  Market-making in a market that is highly speculative and illiquid isn’t the same as market manipulation though.

smfjaw 2mo ago

manipulate foreign equity markets