# Jane Street vs SEBI explained. The Rs 4,843 crore Bank Nifty case, and the document fight that is still open

> Jane Street vs SEBI explained: the July 2025 interim order, the Rs 4,843.57 crore escrow, and the tribunal order reserved on 21 October 2026.

- Source: https://setupbook.io/blog/jane-street-sebi-case-explained
- Site: SetupBook
- Language: en
- Published: 2026-10-30
- Tags: news, regulation, india
- tr: https://setupbook.io/tr/blog/jane-street-sebi-davasi-bank-nifty-4843-crore-aciklama
- es: https://setupbook.io/es/blog/jane-street-sebi-caso-bank-nifty-explicado-para-traders
- pt: https://setupbook.io/pt/blog/caso-jane-street-sebi-explicado-bank-nifty
- id: https://setupbook.io/id/blog/kasus-jane-street-vs-sebi-manipulasi-bank-nifty-dijelaskan
- vi: https://setupbook.io/vi/blog/vu-jane-street-sebi-thao-tung-bank-nifty-giai-thich
- de: https://setupbook.io/de/blog/jane-street-sebi-fall-erklaert-bank-nifty-4843-crore
- fr: https://setupbook.io/fr/blog/jane-street-contre-sebi-affaire-bank-nifty-expliquee
- ar: https://setupbook.io/ar/blog/jane-street-sebi-case-explained

India's market regulator SEBI says a global trading firm moved the Bank Nifty index to win bigger bets in index options. Jane Street denies it. On 21 October 2026 the Securities Appellate Tribunal (SAT, India's tribunal for securities cases) heard the latest round and reserved its order. That means the judges will announce a decision later, and no date has been reported.

The order the tribunal will issue covers a narrower question, which is whether SEBI must give Jane Street more of its files. So a fight about paperwork now sits on top of a fight about trading, and nobody has decided who is right about the trades.

A trader should care because the case is about index option expiry days, a product with a very large number of small accounts. It is also a clean example of the difference between an allegation, an interim order and a final finding.

## Quick timeline

Everything SEBI says in the July 2025 order is an allegation made on a first look, without a hearing.

| Date | What happened | Where it is recorded |
|---|---|---|
| 6 February 2025 | NSE, on SEBI's instruction, sends caution letters to two Jane Street entities about large positions and certain trading patterns (SEBI's account) | SEBI interim order |
| 3 July 2025 | SEBI issues an ex parte interim order (without hearing Jane Street first), alleging manipulation on 21 days between 31 August 2023 and 22 May 2025 | SEBI interim order |
| 14 July 2025 | SEBI says Jane Street reported depositing Rs 4,843.57 crore in an escrow account, without giving up its legal rights | SEBI press release |
| 21 July 2025 | SEBI says the trading restraints ceased to apply once the escrow was funded, and Jane Street confirmed it will follow the cease-and-desist direction | SEBI press release |
| 3 September 2025 | Jane Street appeals to SAT, asking for documents it says SEBI withheld | Reuters report |
| 9 September 2025 | SAT admits the appeal and gives SEBI three weeks to reply | Outlook Business |
| 25 February 2026 | SAT adjourns a hearing | Business Today |
| 5 to 6 October 2026 | Hearings: SEBI says Jane Street already has enough material, Jane Street says it needs more | Business Today, Deccan Chronicle |
| 21 October 2026 | SAT reserves its order on Jane Street's plea for more documents | LiveLaw |

## What does SEBI say Jane Street did?

The order names four group entities: JSI Investments, JSI2 Investments, Jane Street Singapore and Jane Street Asia Trading. It looked at trading from 1 January 2023 to 31 March 2025 and picked out 18 days, all in Bank Nifty. It then added 3 days in May 2025, in Nifty. That makes 21 days.

Index options are contracts that pay out depending on where an index, such as Bank Nifty, ends. A call option gains when the index rises, and a put option gains when it falls. On expiry day, when the contracts end, volume in index options is far higher than in the shares behind the index. SEBI's theory is that a big player could push the index with a smaller trade in the shares and profit on a much bigger options position.

SEBI describes two patterns.

**Intraday index manipulation (15 Bank Nifty days).** In the morning, SEBI says, the group bought large amounts of Bank Nifty shares and futures in an aggressive way, so the index held up or rose. That made puts cheaper and calls dearer. At the same time it built a big bearish bet in options by buying puts and selling calls. For the rest of the day it sold those shares, the index fell, and the options paid off.

**Extended marking the close (the other 3 Bank Nifty days and the 3 Nifty days in May 2025).** SEBI says the group traded hard in the final stretch of expiry day to move the closing level of the index. Options settle on that close, so SEBI argues a small push there pays off on large option positions held to expiry. The order's example is 10 July 2024, when it says Bank Nifty fell sharply in the last 45 to 60 minutes.

The sample day in the order is 17 January 2024. SEBI says the group bought a net Rs 4,370.03 crore of Bank Nifty shares and futures between 9:15 and 11:47 a.m. and added about Rs 32,114.96 crore of bearish exposure through options. It puts the profit that day at Rs 734.93 crore, the largest of the 21.

SEBI also says that on the 15 intraday days the group lost Rs 199.7 crore in the share and futures trading, and it calls that a cost of the plan. It adds one more point for fairness. Profits alone, the order says, are not a sign of illegality.

## What did the interim order actually do?

An interim order is a temporary order, issued while an investigation continues. This one was dated 3 July 2025 and ran to 105 pages. It told the four entities to put Rs 4,843.57 crore, the total of the alleged gains, into an escrow account. That is a bank account where money is locked under a legal claim in SEBI's favour. Until they did, they could not trade in Indian securities. It also gave them 21 days to reply.

After the escrow was funded, SEBI said on 21 July 2025 that the restraints stopped applying under the order's own terms. The exchanges were told to watch the group's trading closely. Later reports in October 2026 say Jane Street has paid the money and has not resumed trading in India.

## What does Jane Street say back?

Jane Street's public voice here has been short. On 4 July 2025 it told Reuters, as quoted by Business Today, that it is committed to following the rules wherever it operates. The same report says it disagrees with SEBI's order and wants to work with the regulator. When Reuters asked about its tribunal appeal, Jane Street declined to comment and the filing was its statement. We did not find a longer statement on Jane Street's own website.

The firm's arguments come from court hearings, as reported:

- Its trades were conventional index arbitrage, according to a Business Today report of the October 2026 hearing.
- Its lawyer said Bank Nifty shares rose on days when Jane Street was selling, which would cut against the idea that it pushed the index, according to Deccan Chronicle.
- It says SEBI's own surveillance department and the NSE had reviewed the trading and found no abuse before the case was reopened, according to the same report.
- It says SEBI refused it full inspection of the material it relied on, and that a December 2024 internal SEBI surveillance report could not conclude that Jane Street had manipulated the indexes, according to Reuters.

SEBI's answer, as reported on 6 October 2026, is that Jane Street already has enough material. SEBI says it shared the documents cited in the order and more than 10 GB of data. Its counsel told the tribunal that if Jane Street can show its trading was not manipulation, the interim order could "probably be vacated".

## What happened in court on 21 October 2026?

The tribunal heard appeal number 413 of 2025 (JSI Investment Pvt Ltd v SEBI) and reserved its order. LiveLaw reports that Jane Street asked for details of the trades made by the other side of its deals, with time, price and quantity. It also wants SEBI's internal communication and the whistleblower complaints behind the probe. Jane Street's lawyers said SEBI admitted at the hearing that counterparty-specific information had not been given.

SEBI said that at this stage it only has to hand over what it relied on in the interim order. It says that has been done, and that the new demand is a way to slow things down. The tribunal asked, "What exactly have they asked you?" and looked at how much disclosure is needed at the interim stage. No date for the order has been reported.

SEBI also told the tribunal that the matter is still at investigation stage. We found no report of a show-cause notice (SEBI's formal charge sheet) or a final order.

## Why did Indian retail options traders care?

Because many small accounts trade this product, and SEBI's own data says most of them lose. A SEBI study published on 23 September 2024 found that about 93% of individual traders in equity futures and options lost money between FY22 and FY24. Total losses were more than Rs 1.8 lakh crore. The interim order says the alleged moves came at the cost of several hundred thousand small traders. That is SEBI's allegation, not a proven fact.

The order also notes that on 1 October 2024 SEBI had already announced steps to deal with what it saw as overtrading in index options on expiry days.

## What traders can take from it

The case will not tell you how to trade, but it does suggest a few habits.

1. **Treat expiry day as its own trade type.** Tag every expiry-day trade, then compare results, [slippage](https://setupbook.io/glossary/slippage) and mistakes against other days. The numbers may surprise you. The post on [what slippage is](https://setupbook.io/blog/what-is-slippage-in-trading) explains how to measure it.
2. **Size for jumps you cannot explain.** Sharp index moves in minutes happen whatever the cause. A small [position size](https://setupbook.io/glossary/position-size) is what keeps one of them from ending your month. The [position size calculator](https://setupbook.io/calculators/position-size-calculator) does the sum.
3. **Keep your own fills and timestamps.** If you ever need to show what happened to your order at 2:58 p.m., your broker statement and a dated record matter more than memory. A journal built from your own broker data keeps that record without extra typing.
4. **Read the status line before you share a headline.** Interim order, appeal, reserved order and final finding mean different things.

## Frequently asked questions

### What does SEBI's July 2025 order against Jane Street say?

It alleges that four Jane Street group entities manipulated Bank Nifty and Nifty on 21 days to profit from index options, with unlawful gains of Rs 4,843.57 crore. It is an interim order made without a hearing, based on a first look at the evidence. Jane Street disputes it.

### Has Jane Street been found guilty of market manipulation?

No. The interim order is not a final finding. SEBI told the tribunal in October 2026 that the matter is at investigation stage, and we found no report of a show-cause notice or a final order.

### What did the tribunal decide on 21 October 2026?

Nothing on the merits. It reserved its order on whether SEBI must give Jane Street more documents. No date for the decision has been reported as of 30 October 2026.

### Can Jane Street trade in India now?

SEBI said on 21 July 2025 that the trading restraints ceased once the escrow was funded, and that exchanges would monitor the group. Reports from October 2026 say the firm has not resumed trading in India. That is a business choice reported by media, and we did not find a statement from the firm on it.

### What happens next?

The tribunal's order on documents comes first. After that, SEBI's investigation continues, and SEBI can issue a show-cause notice and, later, a final order. Any final order could be appealed to SAT.

## Sources

- [Interim order in the matter of index manipulation by Jane Street Group, SEBI (3 July 2025)](https://www.sebi.gov.in/sebi_data/attachdocs/jul-2025/1751584518593.pdf): the 105-page primary document for the allegations, the sample day and the directions.
- [Update on interim order compliance by Jane Street, SEBI press release (14 July 2025)](https://www.sebi.gov.in/media-and-notifications/press-releases/jul-2025/update-on-interim-order-compliance-by-jane-street_95237.html): the escrow deposit.
- [Update on the Jane Street interim order, SEBI press release (21 July 2025)](https://www.sebi.gov.in/media-and-notifications/press-releases/jul-2025/update-on-the-jane-street-interim-order_95491.html): when the restraints ceased and what Jane Street confirmed.
- [SEBI study on individual traders in equity F&O, SEBI press release (23 September 2024)](https://www.sebi.gov.in/media-and-notifications/press-releases/sep-2024/updated-sebi-study-reveals-93-of-individual-traders-incurred-losses-in-equity-fando-between-fy22-and-fy24-aggregate-losses-exceed-1-8-lakh-crores-over-three-years_86906.html): the 93% figure.
- [What Jane Street says on the SEBI ban, Business Today (4 July 2025)](https://www.businesstoday.in/amp/markets/stocks/story/committed-to-operating-in-compliance-what-jane-street-says-on-sebi-stock-market-ban-483060-2025-07-04): the firm's statement to Reuters.
- [US trading firm Jane Street files appeal against India markets regulator, Reuters via Yahoo Finance (September 2025)](https://finance.yahoo.com/news/exclusive-us-trading-firm-jane-095454014.html): the SAT appeal and its grounds.
- [SAT admits Jane Street's appeal, Outlook Business (September 2025)](https://www.outlookbusiness.com/amp/story/markets/jane-street-vs-sebi-sat-admits-appeal-against-market-regulator-directs-for-clarification-in-three-weeks): admission of the appeal.
- [SAT adjourns hearing in the Jane Street case, Business Today (25 February 2026)](https://www.businesstoday.in/markets/story/jane-street-vs-sebi-sat-adjourns-hearing-in-market-manipulation-case-517925-2026-02-25): the February hearing.
- [SEBI tells SAT that Jane Street has enough data, Business Today (6 October 2026)](https://www.businesstoday.in/markets/story/sebi-tells-sat-that-jane-street-has-enough-data-to-respond-to-market-manipulation-charges-559953-2026-10-06): SEBI's and Jane Street's October arguments.
- [Jane Street denies market manipulation to India securities court, Deccan Chronicle (5 October 2026)](https://www.deccanchronicle.com/amp/business/economics/jane-street-denies-market-manipulation-to-india-securities-court-1993337): Jane Street's arguments and the report that it has not resumed trading.
- [SAT reserves order on Jane Street's plea over non-disclosure, LiveLaw (21 October 2026)](https://www.livelawbiz.com/securities-law/sat/securities-appellate-tribunal-reserves-order-jane-street-challenge-sebi-non-disclosure-relevant-documents-555493): the 21 October hearing.
- [SAT reserves order on Jane Street plea for SEBI data, Whalesbook (21 October 2026)](https://www.whalesbook.com/news/English/sebiexchange/SAT-Reserves-Order-on-Jane-Street-Plea-for-SEBI-Data/6ad87c3a79a16deaeaf89927): second report of the same hearing.

*This post is based on public sources as of October 30, 2026. Found a mistake? Write to info@setupbook.io.*