CAS Sends Nifty Soaring 300 Points in a Minute, Breaching 23,000 on Expiry Day!

The recent trading session reflected significant volatility in the Indian equity markets, notably during the closing auction phase. The Nifty index experienced a remarkable spike exceeding 300 points, surging above the 23,000 mark before ultimately closing at 22,776 after some price corrections. Similarly, the Sensex reached a peak of 73,259 before retracting to close at 73,068, indicating that the monthly expiry day led to intense trading activity and abrupt market shifts. This heightened volatility was predominantly driven by the implementation of the new Closing Auction Session (CAS) introduced by Sebi, aimed at improving price discovery yet inadvertently exacerbating end-of-session swings.

The introduction of CAS has become a focal point of discussion among market participants, especially given the scrutiny it is undergoing. Despite its intention to promote fair pricing mechanisms, reports indicate that Sebi may consider reversing certain CAS rules, particularly those affecting derivative settlements. This comes after substantial feedback, with over 20,000 comments received regarding the system’s effectiveness. Investors are keenly watching for potential adjustments, which could see a shift to using the volume-weighted average price for settlements over the current auction-based model.

Moreover, recent analyses by Jefferies suggest a possible easing of the volatility concerns associated with CAS, as trading volumes in options have reportedly stabilized following a decline post-implementation. With the Average Daily Turnover (ADTO) in index options mirroring pre-CAS levels, there is potential for recovery in trading volumes and market confidence. Jefferies has highlighted specific stocks, including Groww and MCX, as likely beneficiaries of this recovery, suggesting that a strategic focus on these firms may enhance portfolio resilience amid ongoing market fluctuations.

Source: The Economic Times

(Expert Note: This intelligence brief was structured and verified by the Wealthova editorial desk.)