One query related to 'Volume' and 'Change in OI' on NSE option chain for scripts under F&O ban.
As during ban period, one is only allowed to close open position and cannot add new position, Number of contracts traded, i.e. Volume should equal Change in OI. But when I check on option chain for securities like SAIL, IDEA, which are in F&O ban today, it does not seems to be the case. There is difference in volume traded and Change in OI.
Request if someone can help clear my understanding on the same. Thanks.