Regulatory agility through consultation is a hallmark of good market governance. Critically evaluate SEBI's approach to derivatives settlement reforms in 2026.

SEBI's January 2026 circular introduced a Closing Auction Session (CAS) from 3 August 2026 and made the CAS price the basis for settling derivatives on expiry [1]. Within about ten weeks SEBI consulted the market and then moved derivatives settlement back to the last-30-minute VWAP (volume-weighted average price). It kept CAS for cash-market closing prices [2]. This shows agility, but it also shows that the reform was not designed carefully enough before launch.

Strengths: agility through consultation

• Evidence-led review: the consultation paper looked at the "initial experience" of CAS and asked for public comments by 3 October [3].
• Calibrated options: SEBI did not offer an all-or-nothing choice. It weighed a blended method (30 minutes of continuous trading plus 10 minutes of CAS) against an interim VWAP based only on continuous trading, with a review after at least one year [3].
• Surgical reversal: CAS still sets cash closing prices. This keeps its alignment with global practice such as HKEX's closing auction and its fair access for all investors [4]. Only the derivatives link was cut [2].
• Investor protection: an average taken over 30 minutes is harder for a few auction orders to move. This protects retail F&O traders from sharp jumps in option prices on expiry day.

Weaknesses: agility as course-correction

• Untested launch: derivatives payouts were linked to CAS before it had been tested on a real expiry day. The volatile indicative prices led SEBI to propose that it stop publishing the indicative index value during CAS [3].
• VWAP is not manipulation-proof: the Jane Street interim order (July 2025) impounded about ₹4,844 crore for alleged expiry-day index manipulation. This happened under the VWAP regime that existed before CAS [5].
• Dual closing prices: the cash market now closes at the CAS price while derivatives settle at VWAP. Hedgers holding both can see the two sides close at different prices.
• Capture risk: much of the pushback came from intermediaries who earn from F&O volumes. The final choice must rest on data, not only on their lobbying.

Verdict and way forward

• On balance, SEBI's approach was responsive and consultative, but reactive.
• During the one-year window, SEBI should publish data on how deep the auction is and how far CAS prices move from continuous-trading prices. It should link derivatives back to CAS only once the auction is deep enough.
• Future changes to trading mechanisms should be piloted first, and exchanges should closely watch the 30-minute VWAP window.

SEBI's 2026 reforms show that consultation can correct a flawed rule quickly while keeping the useful part of the reform. Testing before launch and transparent, data-backed reviews would turn this reactive agility into anticipatory regulation. That would serve the SEBI Act's twin mandate of protecting investors and developing the securities market.