The Foreign Institutional Investors (FIIs) were net sellers to the tune of Rs 968.95 crore in the futures & options segment on Friday.According to data released by the NSE, FIIs were net sellers of index futures to the tune of Rs 1,150.36 crore and bought index options worth Rs 85.24 crore. They were net buyers of stock futures to the tune of Rs 80.27 crore and bought stock options worth Rs 15.90 crore.