Following CHAOS, Sebi goes back to its old ways

What happened: Sebi revised its closing auction session (CAS) framework and derivatives expiry settlement methodology. The CAS will run from 3.30 pm to 3.40 pm on all trading days. Key numbers: Changes take effect December 7, 2026, except rules on transitioning unexecuted limit and iceberg orders, effective February 8, 2027. Why it matters: Sebi reviewed the framework after implementation and sought public comments via a consultation paper issued on September 12. Exchanges and clearing corporations must amend standard operating procedures within seven days of the circular's issuance.

High-priority alert based on source significance and keyword relevance.

High-priority alert based on source significance and keyword relevance. — impact context not separately stored; see What changed.