By Shivanand Pandit
India’s financial landscape has been rocked by an unprecedented regulatory action—one that could reshape how foreign proprietary trading firms operate in the country. The Securities and Exchange Board of India (SEBI), the market regulator, has taken decisive action against Jane Street, a renowned New York-based proprietary trading firm known globally for its high-frequency, algorithm-driven strategies. Accused of manipulating the Indian derivatives market, Jane Street’s actions have raised fundamental questions about market integrity, investor protection, and regulatory preparedness in India. The unfolding saga reveals not just the scale of manipulation but also the vulnerabilities within India’s market structure. It has opened a critical debate: Can Indian regulators and institutions keep pace with the sophistication of global trading giants?
Jane Street entered the Indian market in 2020, positioning itself through entities such as JSI Investments, JSI2 Investments, Jane Street Singapore, and Jane Street Asia Trading. It also tied up with Nuvama Wealth Management to operate in the cash segment. Armed with cutting-edge algorithmic strategies and superior trading infrastructure, the firm set its sights on India’s booming derivatives markets.
India, by this time, had become a global epicentre for equity derivatives, with the National Stock Exchange (NSE) accounting for more than 60% of global trades in this segment. The high retail participation and explosive volume growth presented both opportunity and risk—a ripe field for high-frequency trading strategies.
Between January 2023 and March 2025, Jane Street’s proprietary trading arms reportedly amassed staggering profits of ₹36,502 crore. On a single day—January 17, 2024—the firm reportedly earned more than ₹735 crore. But such profitability soon drew scrutiny. SEBI alleged that these gains stemmed not from fair trading but from coordinated manipulation designed to distort price discovery in the market.
Dissecting the Manipulation: SEBI’s Findings
SEBI’s 105-page interim order, supported by more than 500 pages of annexures, outlines in meticulous detail how Jane Street’s operations systematically exploited the Indian market, especially during derivatives expiry days. Two core tactics were identified:
1. Index Inflation and Dumping
In the morning, Jane Street entities aggressively bought stocks that were constituents of the Bank Nifty index, alongside index futures. This artificially inflated the value of the index.
Simultaneously, they established short positions in Bank Nifty options—betting that the index would fall.
In the afternoon, they reversed their position by dumping the stocks, triggering a sharp decline in the index.
This volatility inflated the value of their short options, resulting in outsized profits.
2. “Marking the Close”
Jane Street allegedly placed large, aggressive buy or sell orders in the last minutes of trading.
These orders were strategically timed to influence the closing price of the Nifty and Bank Nifty indices—critical benchmarks for derivative settlements.
SEBI described this as “non-neutral trading behaviour,” accusing the firm of trying to manipulate settlement values.
These manipulative strategies allowed Jane Street to make enormous profits with limited capital investment, at the cost of destabilising the market.
Red Flags and Regulatory Apathy
Interestingly, SEBI’s scrutiny of Jane Street wasn’t sudden. As early as February 2025, the NSE—under SEBI’s supervision—had issued a formal warning to Jane Street, urging the firm to desist from suspicious trading practices. Jane Street responded with assurances, claiming full compliance.
Yet, by May 2025, the firm resumed the same trading strategies, ignoring previous warnings. This led SEBI to categorise Jane Street as a “bad faith actor.” Its refusal to adjust its methods despite regulatory alerts undermined its credibility and signalled a clear intent to deceive.
SEBI responded with unprecedented severity in July 2025. The regulator’s measures included:
Banning Jane Street and its four affiliated entities from Indian markets.
Impounding alleged unlawful gains worth ₹4,843.5 crore.
Restricting their bank operations and limiting derivative carry-forward exposure to ₹1,500 crore.
Launching a wider investigation into similar manipulative practices by other entities.
The message was unmistakable: no foreign firm, regardless of size or global reputation, would be allowed to compromise the integrity of Indian markets.
Retail Investors: Caught in the Crossfire
This scandal is particularly significant given the dramatic rise in retail participation in Indian capital markets. Millions of first-time investors have been drawn into the equity and derivatives markets, especially post-pandemic.
A recent SEBI study revealed that 93% of retail investors trading in derivatives lost money in FY24, with average per-trader losses pegged at ₹1.25 lakh. Jane Street’s alleged tactics exploited behavioural patterns among retail traders—pumping up indices to lure buyers, then dumping stocks to crash the market and pocket the difference.
This pump-and-dump strategy resulted in a massive wealth transfer—from ordinary investors to a technologically advanced global firm. The case exemplifies the stark asymmetry in access, speed, and resources between domestic retail traders and foreign algorithmic players.
Structural Flaws and the Market’s Weak Underbelly
The Jane Street episode has exposed deep structural weaknesses in India’s market ecosystem. Key systemic concerns include:
• Shallow Cash Markets
Jane Street’s ability to manipulate indices revealed a troubling lack of depth in India’s cash markets. The ease with which it moved prices using relatively low volumes indicates that liquidity is insufficient in the underlying stock market.
• Algo Accountability
With algorithms now responsible for a majority of trades, determining accountability becomes tricky. While firms may argue that trades are executed by automated systems, SEBI rightly maintains that users of such algorithms are ultimately responsible for their actions.
• Absence of Unified Surveillance
The manipulative strategies exploited gaps between cash, futures, and options segments. This calls for an integrated, real-time surveillance mechanism that tracks cross-segment activity.
• Weak Deterrents
Critics argue that allowing firms to simply pay impounded amounts to resume trading sends the wrong signal. A stronger legal framework and harsher penalties are essential to dissuade future malpractices.
Global Ramifications and the Role of FPIs
Jane Street reportedly repatriated over ₹32,681 crore in profits during the period in question. This raises critical questions about capital flight and the opacity in foreign portfolio investor (FPI) structures.
India has welcomed foreign investment with open arms, but if foreign entities exploit complex ownership structures to evade scrutiny or manipulate markets, the long-term consequences could be dire. SEBI must step up due diligence requirements, including mandatory disclosures on FPI ownership and trading algorithms.
While some fear this case may deter other global players from entering India, it could also serve a more constructive purpose—encouraging only those who are willing to adhere to fair play and transparency.
SEBI’s Evolution: Challenges and Opportunities
The Jane Street saga is also a test of SEBI’s regulatory agility. While the eventual crackdown was strong, the fact that misconduct was uncovered only after details emerged from a U.S. court case suggests a gap in proactive detection.
To its credit, SEBI is now investing in AI-driven surveillance tools to detect complex patterns and prevent future manipulation. But tools alone are not enough. The regulator must consider broader reforms:
Restricting expiry-day trades to reduce market manipulation opportunities.
Enhancing margin requirements for high-risk positions.
Improving transparency and disclosure norms for foreign players.
Developing a compensation framework for retail investors harmed by proven cases of manipulation.
What Retail Investors Can Learn
The Jane Street case is not just a regulatory story—it’s a lesson for millions of Indian traders and investors. Key takeaways include:
Avoid expiry-day trades: These are often manipulated by institutional players with deep pockets and sophisticated algorithms.
Understand the risks of derivatives: Options may offer high rewards, but they are equally high risk and prone to manipulation.
Stay informed: Reading SEBI’s detailed order provides invaluable insights into market operations and risks.
Don’t blindly follow index movements: These can be driven by artificial strategies with no relation to company fundamentals.
Ultimately, individual investors must focus on education, long-term thinking, and risk management.
Set off alarm bells
The SEBI–Jane Street episode marks a turning point in India’s capital market journey. It has highlighted systemic vulnerabilities, raised questions about regulatory surveillance, and reignited discussions about the role of technology in modern finance. If SEBI can build on this momentum to implement real reforms—strengthening enforcement, tightening surveillance, and supporting retail investors—then this scandal could catalyse long-overdue improvements. However, if deterrents remain weak and lessons are forgotten, confidence in the system—especially among retail participants—could be permanently eroded.
In today’s high-speed, globally connected financial world, the integrity of a market is only as strong as its weakest regulatory link. The message from this saga is clear: market manipulation, no matter how advanced or discreet, must never be tolerated. And regulators must be as fast, sophisticated, and resolute as those they seek to regulate. At a time when millions of new investors are entering the stock markets, the regulator must uphold market integrity. Surveillance and monitoring systems must be robust enough to track transactions across all levels and promptly flag irregularities. Swift and decisive regulatory action is essential to preserve the trust and sanctity of the markets.
SEBI’s long-overdue crackdown on powerful traders like Jane Street has finally exposed the brazen manipulation plaguing expiry-day trading. The firm’s deliberate distortion of Bank Nifty options and equity settlement prices—by executing massive expiry-day trades to depress index levels—amounts to a textbook case of unjust enrichment. These tactics allowed Jane Street to pocket massive profits from derivatives positions while retail investors, who constitute over 90% of the market, bore the brunt of the losses.
Such manipulative “two-way trades”—selling ahead of expiry and reversing positions afterwards—corrupt the very foundation of price discovery in what is meant to be a fair, zero-sum market. SEBI’s disgorgement order, though welcome, barely scratches the surface. The real question is this: how will SEBI compensate the lakhs of ordinary investors whose hard-earned money was siphoned off by these privileged, tech-powered players?
Regulatory action cannot stop at punishment—it must also ensure restitution. SEBI must urgently ban reversal-based expiry trades, launch a sweeping probe into other institutional manipulators and foreign portfolio investors (FPIs), and level the playing field by guaranteeing equal access to trading infrastructure. Anything less would be a betrayal of the retail investors whose trust sustains India’s markets.
