The Foreign Institutional Investors (FIIs) were net sellers to the tune of Rs 281.17 crore in the futures & option segment on Thursday.According to data released by the NSE, FIIs were net sellers of index futures to the tune of Rs 65.38 crore and sold index options worth Rs 13.94 crore. They were net sellers of stock futures to the tune of Rs 209.31 crore while bought stock options worth Rs 7.35 crore.As per data available on the Sebi website - FIIs were net buyers of stocks worth Rs 244.20 crore in the cash market on Wednesday. Mutual funds were net sellers of shares worth Rs 177.37 crore on the same day.