Comment by monooso

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...