The Foreign Institutional Investors (FIIs) were net sellers to the tune of Rs 476.93 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 241.45 crore and bought index options worth Rs 868.65 crore. They were net sellers of stock futures to the tune of Rs 1,104.76 crore and bought stock options worth Rs 0.63 crore.