Mastering SEBI's New Closing Auction Session (CAS): What Traders Need to Know

Описание: Starting on August 3, 2026, SEBI is introducing a major shift in how the daily closing price is determined for certain stocks
. If you trade equity shares that have Futures & Options (F&O) contracts, regular trading will now abruptly end at 3:15 PM to make way for the new Closing Auction Session (CAS)
.
In this video, we break down exactly how this new framework operates and what it means for your open positions. We will cover:
The New Trading Timeline: A complete walkthrough of the session, from the 3:00 PM intraday cut-off and reference window all the way to the random close and matching window that ends at 3:30 PM
.
Calculating the Reference Price: How the exchange uses the Volume Weighted Average Price (VWAP) of trades between 3:00 PM and 3:15 PM to establish the baseline for the auction
.
The Strict ±3% Price Band Rule: Learn how the exchange prevents wild price manipulation by automatically rejecting any orders placed outside a 3% range of the Reference Price
.
Managing Open Orders: Find out which of your existing orders are carried forward into the auction and which ones—like stop-loss or Immediate or Cancel (IOC) orders—are immediately canceled
.
Finding the Equilibrium Price: A behind-the-scenes look at the math the exchange uses to stack buy and sell orders to find the single price where the maximum number of shares can trade, which then becomes the official closing price
.
Note: Because the equity market uses this time to settle closing prices, trading for F&O contracts will be extended to 3:40 PM
.
Watch now to ensure you are fully prepared for SEBI's new CAS process and know exactly how your trades will be matched at the end of the day!