SEBI faces rebuttal from Jane Street over trading practices: A response from Jane Street refuting accusations regarding their trading operations made by the Securities and Exchange Board of India.
The Securities and Exchange Board of India (SEBI) has accused Jane Street Group LLC of engaging in systematic index manipulation in the Indian securities market, leading to the firm’s temporary ban from trading in India and the seizure of approximately ₹4,843 crore (around $565 million) as unlawful gains.
SEBI’s allegations centre around a manipulative trading strategy, known as "Marking the Close," where Jane Street is said to have deliberately influenced prices of stocks and index futures tied to major indices like Nifty Bank and Nifty 50. The firm is accused of executing an "Intra Day Index manipulation strategy" where they aggressively bought constituent stocks and futures in the morning to artificially inflate prices, then sold off these positions in the afternoon causing prices to decline.
The purpose of this artificial price movement was aimed at benefitting the firm’s large derivative options positions, particularly index options nearing expiry. By manipulating underlying cash equities and futures, Jane Street profited from the resulting options price moves, effectively offsetting losses in cash and futures trading through gains in options.
SEBI’s investigation revealed that Jane Street operated across multiple market segments including cash equities, stock futures, index futures, and index options, in an aggressive and large-scale manner. The intensity and scale of their intervention, coupled with rapid reversals of large trades lacking plausible economic rationale, indicated manipulative intent.
SEBI analyzed trading patterns over 18 days, highlighting several instances where Jane Street’s actions pushed up the BANKNIFTY index to enable building large short positions, which were then reversed to push the index down, generating substantial profits. SEBI’s 105-page report documents detailed evidence of manipulation based on these price interventions.
In response to SEBI’s allegations, Jane Street has disputed the claims, describing the interim order as containing "erroneous or unsupported assertions." The firm argues that their trading activities comply with market regulations and has committed to further engagement to defend their practices. Senior executives from Hong Kong and New York have flown to Mumbai for discussions and implemented changes to the firm’s strategy.
Jane Street denies any wrongdoing regarding the allegations and intends to challenge the charges levied by SEBI. The firm claims it had been engaging with SEBI since August 2024 and paused trading operations in February 2025 to address concerns raised in letters from two exchanges.
SEBI plans to seize ₹48.4 billion (approximately $564 million), which it describes as "unlawful gains" from Jane Street. The regulator’s actions are considered among the strictest measures taken against a foreign trading entity, reflecting a strong regulatory stance on market integrity and emphasizing scrutiny on algorithm-driven, high-volume trading firms to prevent market abuse.
- The trading strategy called "Marking the Close" that Jane Street Group LLC is accused of using involved manipulating prices of stocks and index futures, such as Nifty Bank and Nifty 50, in the Indian securities market.
- Jane Street is said to have employed an "Intra Day Index manipulation strategy," where they purchased constituent stocks and futures in the morning to artificially inflate prices, and subsequently sold these positions in the afternoon, causing prices to decline.
- The firm's alleged manipulation of underlying cash equities and futures aimed at benefiting their large derivative options positions, particularly index options nearing expiry.
- SEBI's investigation revealed that Jane Street operated aggressively and on a large scale, intervening in multiple market segments including cash equities, stock futures, index futures, and index options.
- SEBI analyzed trading patterns over 18 days, finding several instances where Jane Street's actions involving the BANKNIFTY index enabled the building of large short positions and subsequent reversals to push the index down, generating substantial profits. This behavior, according to SEBI, is indicative of market manipulation.
