Introduction of Closing Auction Session (CAS) from 03 August 2026
Date: - 28-07-2026
Subject: - Important Update: Introduction of Closing Auction Session (CAS) from 03 August 2026
Dear Customer,
Greetings from Motilal Oswal Financial Services Ltd.
We would like to inform you that NSE & BSE will introduce the Closing Auction Session (CAS) in the Equity Cash Segment with effect from 03 August 2026. This change will apply only to F&O eligible securities.
Key Changes:
· Effective Date: 03 August 2026
· Applicable To: F&O eligible stocks in the Equity Cash Segment
· Closing Price: Will be determined through a Closing Auction Session (CAS) based on demand and supply, replacing the existing VWAP-based closing price methodology.
Market Timings:
· 09:15 AM – 03:15 PM: Continuous Trading
· 03:15 PM – 03:20 PM: Transition Period (No Order Entry)
· 03:20 PM – 03:25 PM: CAS Order Entry – Session 1
· 03:25 PM – Random Close (03:28 PM – 03:30 PM): CAS Order Entry – Session 2 (Only Limit Orders Allowed)
· Equity Derivatives Trading: Continues until 03:40 PM (No change in derivative closing price methodology).
Important Points:
· Open limit orders from the regular trading session will be carried forward to CAS.
· Stop Loss, IOC, and Disclosed Quantity orders will not be permitted during the Closing Auction Session.
· Market orders will be accepted only during CAS Session 1 (03:20 PM – 03:25 PM).
· The exchange will determine the closing price through the auction process based on matched buy and sell orders.
· Intraday Product Square-off timing in Equity Segment revised to 3.00 PM from 3.10 PM.
· No Change in FNO Square-off Timing.
Regards,
Team MOFSL
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