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    On what basis is the equilibrium / opening price determined for pre-open session?

    Opening price is determined based on the principle of demand supply mechanism.

    The equilibrium price determined in pre-open session is considered as open price for the day.

     

    Maximum Volume:

    The equilibrium price is the price at which the maximum volume is executable.

     

    Minimum Order Imbalance (if multiple prices qualify):

    In case more than one price meets the criteria, the equilibrium price is the price with minimum order imbalance quantity (unmatched order quantity)

     

    Closest to Previous Closing Price:

    • In case more than one price has same minimum order imbalance quantity, the equilibrium price is the price closest to the previous day’s closing price.
    • In case the previous day’s closing price is the mid-value of pair of prices which are closest to it, then the previous day’s closing price itself is taken as the equilibrium price.
    • In case of corporate action, previous day’s closing price is adjustable closing price or the base price.


    Orders Considered:

    Both limit and market orders reckon for computation of equilibrium price.


    Opening Price for the Day:

    The opening price is determined based on the principle of demand and supply

    • The equilibrium price determined in pre-open session is considered as open price for the day.
    • In case only market orders exist both in the buy and sell side, then order is matched at base price. Therefore, Base price is the opening price.
    • In case no price is discovered in the pre-open session, the price of the first trade in the normal market will be considered as the opening price.
    For which instruments is pre-open session applicable in Equity Derivatives market? What are the pre-open session timings? 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? 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?
    Where can I check my turnover statement for futures and options? Why is there a difference between my profit and loss statement and turnover statement in futures and options?
    What is the Option 20 scheme? What is the GST amount for option trade? Where do I check the date from which I have been mapped under Options 20? Does ICICI Direct offer Futures & Options (F&O) contracts with up to 1-year expiry? What is VAR + ELM? Why is it required for stock options? What are the brokerage charges in Futures & Options if I am mapped to Option 7 scheme? Can I place an order before and after market hours for futures and options on ICICI Direct? What is the MTM (Mark-to-Market) process in F&O? Why am I unable to place an F&O order? Recent Price Revision in F&O When is Extreme Loss Margin(ELM) applicable? Why did my position in Futures and Options get squared-off ? Why isn't my order getting executed even though it has been placed successfully in Futures and Options? Understanding EBA/F&O Entries in Your ICICI Account or Ledger How limits are displayed on limits page? What is settlement cycle in F&O?
    What are the new lot sizes for index derivatives? When will the new lot sizes for weekly and monthly contracts be effective? What happens to existing contracts during the transition? Can different lot sizes co-exist in the same month? How do the new lot sizes impact margin requirements? What other changes has SEBI introduced in the F&O segment? What is the rationale behind the changes in Futures and Options new rules mentioned in circular dated November 2024? What are the implementation dates for the new changes? What is revised expiry schedule for NSE contracts? What is revised expiry schedule for BSE contracts? When will the new lot sizes for derivative contracts be effective? What is the change in lot size for long dated options and do I need to square off my long-dated positions? What are the deadlines to close my long-dated option positions? What Happens If I Do Not Square Off my long-dated options position?
    Removal of Calendar Spread Margin Benefits on Expiry Days What is the removal of calendar spread? What is a calendar spread? How does the removal of margin benefit work on the day of expiry? Which contracts are affected due to removal of calendar spread? What will happen to my calendar spread on expiry day? Will this rule apply to Options Calendar Spread as well? How can traders manage this change? Where can I see my total margins for my positions one day before the expiry? If I am unable to bring the margin how my position will be impacted?
    What is the timeline to act on a shortfall? What should I do in case of a margin shortfall? When does margin shortfall occur? How will I know if I have a margin shortfall?
    What can I do if I already have a position in a banned stock? What is MWPL? When does any stock enter Ban Period in F&O segment? Can I trade in a stock that is under MWPL ban period? What is Change in the Open Interest (OI) Calculation methodology - Delta-Based (Future-Equivalent) OI? What is Position Limit Monitoring for Index Futures and Index Options?
    What is a Quantity Freeze Limit in futures and options?
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