Change in Option prices before market opens

I am observing that for the positions I am holding of previous day, there is change in option prices even before market opens at 9 AM.

Ex, - I shorted a 10900 straddle on last Friday at CE at 124 and PE at 95 just before the closing at 3:28 PM.

Now today at monday morning at 8 AM I am seeing the CE and PE rates at 105 each. How is this possible when market is closed?

This because the closing price of the day on NSE is the weighted average price of the last 30 mins of trading. Last traded price of the day is the actual last traded price.

Due to this the LTP will not match the close on the daily charts either as the close on the daily candle is updated using the close from NSE bhavcopy.

The difference is usually more if the market is moving around quite a bit in the last 30 mins.

You can check the Support article :

1 Like

Thanks a lot Suhas. This answers me query.