The Foreign Institutional Investors (FIIs) were net buyers to the tune of Rs 1,303.83 crore in the futures & option segment on Tuesday.According to data released by the NSE, FIIs were net buyers of index futures to the tune of Rs 954.94 crore and bought index options worth Rs 422.37 crore. They were net sellers of stock futures to the tune of Rs 74.72 crore while bought stock options worth Rs 1.25 crore.As per data available on the Sebi website - FIIs were net buyers of stocks worth Rs 200.70 crore in the cash market on Friday. Mutual funds were net sellers of shares worth Rs 221 crore on the same day.