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The Economic Times
The Economic Times
Kumar Gaurav

Explained: What Sebi’s proposed CAS changes mean for expiry-day trading and settlement

SEBI CTS Methodology

The Securities and Exchange Board of India (SEBI) on Saturday, September 12, proposed changes to the Closing Auction Session (CAS), market timings and the settlement methodology for derivatives contracts, following the experience gained since CAS was introduced on August 3, 2026.

The regulator has proposed two options for determining expiry-day settlement prices for index and stock derivatives, changes to the timing of the continuous trading session (CTS), CAS and derivatives trading, and additional measures aimed at improving the functioning of the auction.

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