The Foreign Institutional Investors (FIIs) were net sellersto the tune of Rs 1,371.65 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 644.37 crore and bought index options worth Rs 10.68 crore. They were net sellers of stock futures to the tune of Rs 716.02 crore and sold stock options worth Rs 21.95 crore.