The Securities and Exchange Board of India has taken action against two market participants for their alleged involvement in manipulating trading activity within a recently launched session designed to determine closing prices. The regulator levied a combined penalty of 3.7 crore rupees on Copthall Mauritius Investment and Mansi Share and Stock Broking Private Limited after an investigation concluded that both entities engaged in improper conduct during the closing auction session.
According to the findings, the firms participated in trades that appeared intended to influence the final settlement prices of certain securities. The closing auction session was introduced to provide a more transparent and orderly mechanism for establishing end-of-day values, yet the regulator determined that the actions of these participants undermined that objective.
The penalty notice outlines that the entities executed orders in a manner that created artificial demand or supply near the close of trading. Such behavior can distort price discovery and affect investors who rely on accurate closing figures for portfolio valuation and index calculations. The regulator emphasized that maintaining integrity in all trading mechanisms remains a priority.
Copthall Mauritius Investment, registered as a foreign portfolio investor, and Mansi Share and Stock Broking Private Limited, a domestic broking firm, were both found to have violated provisions related to fair trading practices. The investigation reviewed order patterns, timing of trades, and the resulting impact on closing prices across multiple sessions.
Market observers note that the closing auction session has gained importance since its rollout, as it serves as the benchmark for mutual fund net asset value calculations and derivative contract settlements. Any attempt to influence outcomes in this window can have wider repercussions across the financial ecosystem.
The regulator has reiterated that all market intermediaries and investors must adhere to established rules governing order placement and execution. Penalties of this nature are intended to deter similar conduct and reinforce confidence in the trading infrastructure.
In its order, the Securities and Exchange Board of India directed the two entities to pay the fines within a specified period. Failure to comply could result in additional restrictions on their market access. The entities retain the right to appeal the decision before the Securities Appellate Tribunal if they choose to contest the findings.
This case highlights ongoing supervisory efforts to ensure that new trading features function as intended without being exploited. The regulator continues to monitor activity across all segments, including equity, derivatives, and debt markets, to identify any irregularities promptly.
Industry participants have been advised to review their internal compliance frameworks, particularly around automated trading strategies and order management systems that interact with auction mechanisms. Robust controls can help prevent inadvertent or intentional violations.
The development comes at a time when Indian capital markets are experiencing increased participation from both domestic and overseas investors. Ensuring that price formation processes remain free from manipulation supports broader goals of market development and investor protection.
Regulatory actions such as this one serve as reminders that all participants, regardless of their size or origin, are subject to the same standards of conduct. The focus on the closing auction session underscores its critical role in the daily market cycle.
Further details regarding the specific trades and the methodology used to calculate the penalty amount are contained in the full adjudication order released by the regulator. Market participants seeking additional clarity are encouraged to consult the official documentation.
Overall, the imposition of these fines reflects a commitment to upholding transparency and fairness in trading operations. Continued vigilance by both regulators and market players will be essential to preserving the credibility of price discovery mechanisms.


