Examine how adaptive regulation — where a regulator revises a newly implemented mechanism based on market feedback — strengthens financial market governance in India.

Adaptive regulation means a regulator treats a new rule as a hypothesis to be tested against live market behaviour and corrected quickly. SEBI's September 2026 review of the Closing Auction Session (CAS), weeks after it went live, shows how this approach deepens capital-market governance under its SEBI Act, 1992 mandate to protect investors and regulate the securities market [1].

The CAS case: regulation as an iterative cycle

• Design stage: consultation papers in December 2024 and August 2025 preceded the January 2026 circular introducing CAS in the equity cash segment, operational for derivative-eligible stocks from August 2026 [2][3].
• Feedback stage: post-launch, hyperactivity in expiring index options and IEP-linked derivatives trading during CAS surfaced [4].
• Correction stage: the consultation paper of September 12, 2026 proposes either a blended VWAP (last 30 minutes of continuous trading plus the 10-minute CAS window) or an interim reversion to the pre-CAS VWAP, and discontinuing display of the indicative index value while retaining the IEP for individual securities; comments were invited till October 3, 2026 [4].

How it strengthens governance

• Evidence-based rule-making: correction rests on observed order-book behaviour, not assumption [4].
• Investor protection: fixing expiry-day settlement price discovery limits scope for manipulation in a high-volume derivatives market [4].
• Legitimacy and transparency: the consultation paper → public comment → circular route institutionalises stakeholder participation [2][4].
• Reversibility: offering an interim fallback reflects regulatory humility and avoids locking in a flawed design [4].

Concerns to guard against

• Frequent revision raises compliance and system re-engineering costs for exchanges and intermediaries, and can dilute regulatory predictability.
• Consultation risks capture by better-resourced participants unless retail and institutional views are weighed transparently.

Adaptive regulation thus converts governance from a one-time notification into a continuous learning loop. Institutionalising it through structured post-implementation review and regulatory impact assessment, with clearly stated transition timelines, would preserve both market confidence and stability — advancing the SEBI Act's twin objectives of investor protection and orderly market development.