In July 2025, the Securities and Exchange Board of India barred Jane Street, a major US-based trading firm, from India's securities market, after accusing it of mass market manipulation and the illegal recovery of profits through a network of Indian subsidiaries. SEBI's case is that Jane Street used advanced algorithmic strategies to influence derivatives prices on the Nifty and Bank Nifty indices, generating illegal profits exceeding Rs. 36,500 crore between January 2023 and March 2025, at the expense of retail investors who were trading at prices SEBI alleges were distorted.
How the Order Was Issued
The interim order against Jane Street was passed ex parte, without a prior hearing, which raises its own questions about procedural fairness, particularly for a globally regulated entity whose investigation by SEBI is still ongoing. SEBI's case centres on claims that Jane Street executed "expiry-day trades" in a manner that violated the SEBI (Prohibition of Fraudulent and Unfair Trade Practices) Regulations in order to move index prices in its favour. Allegations of this kind are inherently difficult to prove: large-scale trading is not itself prohibited, but trading with the intention to manipulate the market is, and establishing that intention is complicated where sophisticated proprietary and algorithmic trading desks are involved.
A separate strand of SEBI's case concerns India's framework restricting foreign portfolio investors from intraday trading, which mandates delivery-based transactions for that category of investor. SEBI alleges that Jane Street used a dual-entity structure, with domestic subsidiaries executing intraday trades that would not otherwise have been permitted for a foreign portfolio investor, to work around that restriction.
What Happens Next
Jane Street has deposited over Rs. 4,800 crore in an escrow account and has approached the Securities Appellate Tribunal to contest the ban, with the possibility of a further appeal to the Supreme Court. Legal commentary suggests the Tribunal is more likely to grant limited relief, such as unfreezing part of the funds, than to overturn SEBI's order in full, unless Jane Street can show a genuine procedural lapse or misapplication of law; either way, the process is likely to be lengthy.
What It Signals
The episode illustrates a recurring tension in financial regulation: frequent regulatory change and ambiguous interpretation of complex trading activity can itself create the loopholes that sophisticated entities later exploit, which argues for a more precise framework that keeps pace with technological change. At the same time, an ex parte order imposing a severe ban without a prior hearing sits uneasily with principles of natural justice, particularly where the respondent is a global market participant, and sudden, highly publicised regulatory action of this kind carries its own risk of systemic shock and reduced foreign portfolio investment even as it protects retail investors in the immediate term.
More broadly, the action signals that global trading firms exploiting legal grey areas through complex algorithmic strategies will be held to account, and reflects a shift toward more proactive surveillance and enforcement in Indian financial markets, one that is likely to prompt other trading firms to reassess their own models in India. What follows will matter as much as the initial order: a final, legally durable order from SEBI, reached through a fair and transparent process, is what will determine whether market confidence is preserved, and is likely to be accompanied by deeper surveillance of algorithmic and high-frequency trading as markets become increasingly automated.
Disclaimer: The content of this article is intended to provide general guidance on the subject matter. Specialist advice should be sought about your specific circumstances.