pro play with large quantity on the behalf of their clients, their option position plays important role if assume correctly, because options can not be rolled over no one can take option for long term, they have to exit it.
those who have large sum of money, usually big movement comes when fii or pro buy or sell, because they trade with large quantity.
you can find the “participants wise open interest” in nse daily reports
this data is my analysis from that data.
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