India’s securities market regulator, SEBI (Securities and Exchange Board of India), is preparing to reject a request from U.S.-based trading firm Jane Street for additional data and documents in a court appeal, according to sources familiar with the matter.
The firm had appealed the trading ban imposed by SEBI in July 2025 and sought the disclosure of internal data as part of its defense. According to the sources, SEBI’s forthcoming court response will argue that the appeal is a delaying tactic and that providing the requested material could hamper an ongoing investigation.
Background: SEBI’s Ban and Allegations
In July, SEBI temporarily barred Jane Street from operating in Indian markets, alleging that the firm manipulated a key benchmark index tied to banking stocks. The regulator claimed that coordinated trading in both cash and futures markets enabled Jane Street to influence index levels to its advantage.Following the ban, Jane Street paid a penalty and regained access to Indian markets. The firm has also filed an appeal with the Securities Appellate Tribunal (SAT), asking for access to documents and data that were used in SEBI’s investigations.
SEBI’s Strategy Behind the Denial
Sources tell Reuters that SEBI plans to argue in court that Jane Street’s request is not for genuine legal defense, but rather a way to stall proceedings. The regulator believes some of the data demanded could jeopardize its broader investigation into trading behavior spanning from January 2023 to May 2025.
SEBI is examining Jane Street’s activity across all major Indian benchmark indexes during that period, looking for patterns that mirror the trades it flagged in its July order. By withholding the internal documents, SEBI aims to preserve the integrity of that investigation.Legal Moves and Ongoing Dispute
Jane Street’s appeal centers on alleged unfairness in SEBI’s process. The firm argues it needs access to certain reports including a December 2024 internal surveillance report in order to mount an effective defense. In its tribunal filing, Jane Street claimed SEBI’s own surveillance arm initially found no basis for manipulation in that report.
The SAT, which handles appeals against SEBI’s orders, has already instructed SEBI to explain why it can’t share some of those materials. The tribunal paused personal hearings in the case until a later date, giving SEBI time to formulate its argument.
Regulatory Investigation Deepens
According to the sources, SEBI’s investigation has been broad and probing. It is not just focused on one index or one trading strategy regulators are analyzing Jane Street’s trades across multiple markets and over an extended timeline. The investigation seeks to uncover whether coordinated trading helped the firm profit from derivative contracts.
SEBI’s leadership reportedly believes that releasing the data could tip off Jane Street to its “smoking guns.” Officials think that by refusing, they can safeguard their ability to press forward with enforcement action.
Jane Street’s Defense Case
On its side, Jane Street has maintained that its strategies are standard in global markets. It characterizes its trades in India as arbitrage, not manipulation. The firm argues that SEBI’s allegations ignore the legitimate functions of arbitrage and liquidity provision.
Through its appeal, Jane Street is pressing for transparency. It claims SEBI has relied on data and internal communications that the firm has not been allowed to see. Without access to those materials, Jane Street argues, it cannot properly defend itself against serious regulatory allegations.
Potential Implications for Market Integrity
The standoff between SEBI and Jane Street underscores a broader tension in global markets: how regulators balance enforcement with fairness, especially when dealing with powerful international trading firms. SEBI’s hard line indicates it is prioritizing deep investigations over legal concessions.
Meanwhile, Jane Street’s push for disclosure could shape how future high-frequency or quantitative traders are treated by regulators in India and elsewhere. The case may influence how much internal data regulators must turn over in legal disputes involving market manipulation.
