The Foreign Institutional Investors (FIIs) were net buyers to the tune of Rs 1,101.88 crore in the futures & option segment on Friday.According to data released by the NSE, FIIs were net buyers of index futures to the tune of Rs 355.29 crore and bought index options worth Rs 517.84 crore. They were net buyers of stock futures to the tune of Rs 216.53 crore and sold stock options worth Rs 12.22 crore.