The Foreign Institutional Investors (FIIs) were net sellers to the tune of Rs 265.48 crore in the futures & option segment on Friday.According to data released by the NSE, FIIs were net sellers of index futures to the tune of Rs 139.16 crore while bought index options worth Rs 59.05 crore. They were net sellers of stock futures to the tune of Rs 177.35 crore and sold stock options worth Rs 8.02 crore.As per data available on the Sebi website - FIIs were net sellers of stocks worth Rs 262.20 crore in the cash market on Wednesday. Mutual funds were net sellers of shares worth Rs 21.42 crore on the same day.