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    What are the pre-open session timings?

    The pre-open session shall be conducted using call auction mechanism for duration of 15 minutes i.e., from 9:00 am to 9:15 am. The pre-open schedule shall be as follows:

    Session

    Time

    Remarks

     

     Order Entry Period

     

    9:00 am - 9:08 am (*)

    • Order entry, Modification and Cancellation

    (*)System driven Random closure between 7th and 8th minute.

    • Random closure of equity segment preopen & equity derivatives segment preopen will be independent.

     

    Order Matching & Trade Confirmation Period

     

    9:08 am (*) – 9:12 am • (*)

    (*) Order matching period will start immediately after completion of order entry period.

    • Opening price determination.

    • Order matching and trade confirmation.

     

    Buffer Period

    9:12 am - 9:15 am

    Transition from pre-open to continuous trading session

     

     

    Note: For index-based market- wide circuit filter breach or any outage (stopping of trading, either suo moto by Exchange or by virtue of reasons beyond control of stock exchange), the market shall open with a pre-open session and its timings shall be informed separately on that day.

    For which instruments is pre-open session applicable in Equity Derivatives market? What shall be the trading parameters for Equity Derivatives market for pre-open session? Will the Self Trade Prevention Check (STPC) mechanism be applicable during the pre-open session in the Equity Derivatives segment? The pre-open session comprises of how many sessions? What are the features? On what basis is the equilibrium / opening price determined for pre-open session? What happens to unmatched orders which are entered in the pre-open session? Will the orders received in pre-open session be validated at the applicable margins?