सेबी की दो जांचों में ‘कोई हेरफेर नहीं’ का निष्कर्ष, फिर भी जेन स्ट्रिट को 567 मिलियन डॉलर का जुर्माना

India's Securities Appellate Tribunal heard Jane Street's formal denial of market manipulation allegations Monday — and the US trading giant's central argument was a striking one: the same regulator that imposed a ₹4,843.57 crore (approximately $567 million USD) penalty had twice concluded, through its own surveillance process, that no such manipulation had occurred. The tribunal heard Jane Street's plea on Monday, with the firm seeking access to SEBI trading records it argues are central to clearing its name.

The hearing, held Monday in Mumbai before India's Securities Appellate Tribunal (SAT), represents the most significant procedural flashpoint yet in a 15-month legal battle that has reshaped the conversation about how India — the world's largest equity derivatives market by contracts traded — regulates high-frequency and algorithmic trading firms.

Jane Street's senior counsel, Darius Khambata, pressed the tribunal on a documented sequence that the firm argues is central to its defense. In November 2024, the National Stock Exchange reviewed Jane Street's trades and found no evidence of manipulation. A month later, in December 2024, SEBI's own Integrated Surveillance Department conducted a separate review and reached the same conclusion. According to Jane Street's SAT filings via Reuters, the ISD's written findings stated that "on the basis of available information at this juncture, it is proposed that the matter may not be pursued further."

SEBI's Own Surveillance Arm Recommended Dropping the Case

Yet in that same month — December 2024 — SEBI set up a new inter-departmental team to re-examine Jane Street's trades. Seven months later, on July 3, 2025, the regulator issued a 105-page interim order banning Jane Street from Indian markets and ordering disgorgement of what it called ₹4,843.57 crore (approximately $567 million USD) in alleged unlawful gains. The SEBI order barring Jane Street was described by the regulator as one of its largest-ever enforcement actions against a foreign investor.

What changed between the two clearances and the final order? Jane Street's legal team pointed to a complaint from a UAE-based hedge fund manager — one that allegedly came with a personal meeting between that manager and a SEBI whole-time member. Khambata asked the tribunal directly: "What was so stunning about this complaint that it received?"

What SEBI Says the Earlier Reviews Missed

SEBI's senior counsel Gaurav Joshi pushed back on Jane Street's framing of the earlier surveillance reports as exonerations. He told the tribunal that the NSE's November 2024 review had examined only a handful of stocks during the opening hour of trading — roughly 9:15 to 10:15 AM — and therefore could not serve as a clean bill of health for the firm's activity across a full expiry-day trading session.

It was only a subsequent, far more granular minute-by-minute review of Jane Street's complete order flow, Joshi argued, that revealed the pattern the July 2025 order describes: systematic and coordinated buying of Bank Nifty constituent stocks in the opening hours to drive the index up, followed by a reversal near market close that allowed derivatives positions to generate outsized returns. Joshi additionally disclosed that SEBI has since widened its probe to other indices.

SEBI also contested the scope of Jane Street's document demands, which include internal meeting minutes, details of the committee that authorized the new investigation team, and the regulator's full correspondence with the NSE. Joshi argued the firm had already received over 10 gigabytes from SEBI — including the NSE report — and characterized Jane Street's additional requests as a "fishing expedition" designed to obtain administrative records rather than substantive evidence.

Background: The ₹4,843.57 Crore Order

The July 3, 2025 interim order was among SEBI's largest enforcement actions against a foreign investor in the regulator's history.

The 105-page document alleged that Jane Street deployed a coordinated, two-legged strategy on at least 21 trading days between January 2023 and March 2025. One arm of the firm would, per SEBI's allegations, purchase large volumes of Bank Nifty constituent stocks and futures in the opening hours of each expiry session, artificially driving the 12-banking-stock index upward. A second arm simultaneously built significant short positions in Bank Nifty options. As expiry approached, Jane Street allegedly offloaded its underlying positions — triggering a sharp index reversal — while its derivative positions, now deep in the money, generated the contested profits. SEBI also identified a variant it termed "Extended Marking the Close," used on at least three additional occasions. At times, according to the order, Jane Street's trading constituted approximately 40% of the volume in the underlying securities.

SEBI separately noted that Jane Street's put option exposure ran approximately seven times its cash market exposure — a disproportion that the regulator argued made index distortion the purpose, not a side effect, of the strategy. Between January 2023 and March 2025, the four Jane Street entities collectively earned approximately ₹43,289 crore (approximately $5.07 billion USD) through equity options trading in India, per SEBI's accounting in the interim order.

Jane Street denied the findings at the time, calling the order "fundamentally mistaken" and characterizing its trades as standard index arbitrage — buying constituent stocks to close pricing gaps between the cash, futures, and options markets — a function performed by liquidity providers and market makers in derivatives markets worldwide.

What Is "Marking the Close" — and Why Does It Matter?

The legal and conceptual divide at the heart of this case turns on a specific question: at what scale does legitimate arbitrage become manipulation?

"Marking the close" is an established securities violation in which a trader executes orders near a market's close specifically to move the settlement or reference price of a derivative — creating a fiction of market movement that benefits the trader's derivative positions. It is prohibited in the United States under Securities Exchange Act regulations and in India under SEBI's Prohibition of Fraudulent and Unfair Trade Practices (PFUTP) regulations.

Jane Street's defense — that it was performing legitimate index arbitrage — acknowledges that it was buying Bank Nifty constituent stocks to profit from price gaps between the cash and derivatives markets. What it disputes is that those trades were designed to move the index rather than to track an existing mispricing. The distinction is one of intent and proportionality: did Jane Street's cash-market activity respond to price gaps, or create them?

SEBI's position is that when a single firm accounts for 40% of underlying stock volume on expiry days while simultaneously holding derivative positions seven times larger than its cash exposure, the law of large numbers converts what might be legitimate arbitrage at smaller scale into manipulation at Jane Street's scale. Jane Street, for its part, maintains that SEBI's order "disregards the role of liquidity providers and arbitrageurs in markets."

Procedural Deadlock: Document Discovery Battle

Monday's hearing crystallized a procedural standoff that has defined the SAT proceedings since Jane Street filed its appeal in September 2025.

The firm has sought approximately 61 documents from SEBI, including complete trade logs with counterparty details (some of which SEBI provided in masked format), the full text of the ISD's December 2024 clearance report, and the regulator's correspondence with the NSE about those earlier surveillance reviews. Jane Street's argument is straightforward: if SEBI's own surveillance arm found no basis for action and a third-party complaint appears to have triggered the reopening, those documents are not peripheral to the defense — they are the defense.

SAT had previously, in September 2025, directed SEBI to explain withheld documents within three weeks. Monday's hearing sharpened that standoff considerably. Whether the tribunal will compel disclosure — which could substantially reshape the regulatory narrative if SEBI's own surveillance team is shown to have recommended abandoning the case — remains the pivotal near-term question.

Liquidity Stakes: Why This Goes Beyond Jane Street

The case has drawn intense attention from market participants well beyond the firms directly involved, because of Jane Street's structural role in India's derivatives ecosystem.

Zerodha co-founder and CEO Nithin Kamath warned when the ban was first imposed that proprietary trading firms like Jane Street account for approximately 50% of India's options trading volumes — and that if those firms withdrew, the effects on retail traders would be material. "If they pull back — which seems likely — retail activity (~35 per cent) could take a hit too. So this could be bad news for both exchanges and brokers," Kamath posted on X in July 2025.

The data bore him out. Following SEBI's ban, India's options trading volumes dropped significantly — a contraction significant enough in a market that processes nearly 60% of global equity options volume to draw commentary from global financial institutions. By some measures, Bank Nifty aggregate trading volumes halved in the five sessions immediately following the ban.

Algorithmic trading — of which Jane Street's strategies are a subset — accounted for more than 69% of India's derivatives market volume in fiscal year 2026, per NSE Market Pulse data. The case therefore touches directly on a question that extends well beyond any single firm's legal fate: how India chooses to regulate the market makers and arbitrageurs who provide the majority of its derivatives liquidity.

Additional Legal Exposure: US Crypto Lawsuit

The SAT proceedings are not Jane Street's only active legal battle. In February 2026 — the same week that SAT adjourned a scheduled hearing — Terraform Labs' bankruptcy administrator filed a federal complaint in New York alleging that Jane Street engaged in insider trading during the May 2022 Terra/Luna cryptocurrency collapse.

The complaint alleged that a former Terraform intern who subsequently joined Jane Street provided the firm with advance knowledge of Terraform's liquidity-withdrawal plans, allowing Jane Street to unwind its UST exposure before the market collapse. Jane Street called the suit "desperate" and denied the allegations. The details remain heavily redacted in the public filing.

SEBI's Broader Regulatory Upgrade

The Jane Street case has accelerated an upgrade of India's derivatives surveillance infrastructure. SEBI Chairman Tuhin Kanta Pandey announced expanded surveillance in July 2025, adding personnel to operations at both the SEBI and exchange levels and committing to examine derivatives market practices with expanded scrutiny.

Among the reforms, SEBI introduced new intraday position limits effective October 1, 2025 — capping net positions in index options at ₹5,000 crore (approximately $586 million USD) per entity per day, compared to an end-of-day limit of ₹1,500 crore (approximately $176 million USD). The new rule directly targets the kind of intraday scale that the Jane Street order alleged.

Wider Implications for Foreign Trading Firms in India

The outcome of the SAT document-disclosure battle may be as significant as the underlying manipulation determination.

If the tribunal orders SEBI to release the withheld surveillance documents and those records confirm that the regulator's own surveillance arm recommended dropping the case, it will raise hard institutional questions: specifically, whether a competitor complaint that bypassed the normal surveillance process and reached a SEBI whole-time member directly was the event that triggered a re-investigation — and if so, what structural safeguards exist to prevent India's enforcement mechanism from being deployed as a competitive weapon.

SEBI has said the UAE-based hedge fund complaint was "not relevant" to its July 2025 order and may be examined separately. That framing, however, does not resolve the sequencing question Jane Street has put before the tribunal: both the NSE and the ISD had cleared the firm before December 2024; a complaint arrived; and a new investigation team was formed that month.

India has rapidly ascended to become the world's largest equity derivatives market by volume, attracting global participants including Citadel Securities, IMC Trading, Millennium Management, and Optiver. The legal standard SAT applies in this case — and whether document discovery rights in securities enforcement proceedings extend to a regulator's own prior surveillance findings — will shape how those firms assess regulatory risk in India for years to come.

Frequently Asked Questions

What did SEBI's own surveillance reports actually say about Jane Street before the $567 million penalty?

According to documents cited in Jane Street's SAT filings, SEBI's Integrated Surveillance Department concluded in December 2024 that "on the basis of available information at this juncture, it is proposed that the matter may not be pursued further." A separate NSE review in November 2024 reportedly found evidence of manipulation in only five of 53 time slots examined. SEBI argues both reviews covered narrower time windows and stock sets than its definitive minute-by-minute analysis, which it says revealed a pattern the earlier reviews missed.

What is the difference between index arbitrage — Jane Street's defense — and "marking the close" manipulation?

Index arbitrage involves buying securities that are priced lower in one market (say, the cash stock market) and selling equivalent positions in another (say, the futures or options market) to profit from the pricing gap. It is generally considered market-beneficial because it aligns prices across markets. "Marking the close" is manipulation: trading near market close specifically to move the settlement price of a derivative for profit, regardless of whether a genuine price gap exists. The line between them, in Jane Street's case, comes down to scale and intent — whether the firm's cash-market activity responded to pricing gaps it observed, or created gaps through the sheer weight of its own orders.

Why would a complaint from a UAE-based hedge fund matter to SEBI's investigation?

Jane Street's legal filings allege that a UAE-based hedge fund manager filed a complaint about Bank Nifty implied volatility patterns on expiry days, and that this complaint came with a direct personal meeting with a SEBI whole-time member. The firm argues that this complaint — rather than any new independent surveillance finding — triggered SEBI's formation of a new inter-departmental investigation team in December 2024, the same month its own surveillance department had recommended closing the matter. If true, it raises a structural question about whether India's enforcement process has adequate insulation between competitor complaints and enforcement decisions. SEBI has said the complaint was "not relevant" to its July 2025 order.

What happens if SAT sides with Jane Street on document disclosure?

If the tribunal orders SEBI to release its internal surveillance correspondence and those documents confirm that the ISD recommended dropping the case before the UAE complaint arrived, it would significantly complicate SEBI's position in the underlying manipulation proceeding. It would not automatically vacate the $567 million penalty — that depends on whether the substantive manipulation allegations are ultimately upheld — but it could undermine the regulatory narrative and give Jane Street additional grounds to challenge the interim order's findings. The case would then move toward a final order proceeding in which Jane Street's full defense, including its arbitrage-not-manipulation argument, would be litigated on the merits.

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