The Foreign Institutional Investors (FIIs) were net sellers to the tune of Rs 208.99 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 8.92 crore and bought index options worth Rs 231.52 crore. They were net sellers of stock futures to the tune of Rs 447.24 crore and sold stock options worth Rs 2.19 crore.As per data available on the Sebi website - FIIs were net buyers of stocks worth Rs 56.20 crore in the cash market on Thursday. Mutual funds were net buyers of shares worth Rs 392.40 crore on the same day.