Sebi Retains Closing Auction Session but May Revise Derivatives Settlement

Sebi Chairman Tuhin Kanta Pandey has confirmed that India's Closing Auction Session (CAS) mechanism will continue, despite growing trader concerns about market volatility. According to the announcement, the regulator is actively reviewing how derivative settlement prices are calculated following the CAS implementation. The move addresses complaints from market participants who have flagged sharp swings on expiry days linked to the new mechanism. Sebi indicated it will issue a consultation paper detailing potential modifications aimed at reducing market shocks and stabilizing trading conditions.

The development comes as the broader market has experienced notable price swings, including another 1,000-point Sensex movement. However, global index provider MSCI reported that its recent rebalancing under the new CAS framework proceeded without significant disruption, suggesting the mechanism itself is functioning operationally. The distinction between settlement methodology concerns and the CAS framework itself highlights a nuanced regulatory approach—maintaining the structural innovation while fine-tuning implementation details.

For traders and investors, the distinction matters significantly. While the CAS framework addresses liquidity and price discovery at market close, derivative settlement calculations directly impact futures and options contracts that expire on specific dates. Sharp expiry-day swings can trigger cascading margin calls and amplify volatility for leveraged positions. Sebi's planned consultation signals the regulator is balancing market modernization with stability, a critical consideration for derivative traders who face concentrated risk on expiry dates. The upcoming consultation paper will likely attract substantial market feedback as stakeholders seek to preserve benefits of the new closing mechanism while mitigating settlement-related shocks.

Source: Markets-Economic Times