The Foreign Institutional Investors (FIIs) were net buyers to the tune of Rs 106.23 crore in the futures & option segment on Tuesday.According to data released by the NSE, FIIs were net sellers of index futures to the tune of Rs 202.06 crore while bought index options worth Rs 197.40 crore. They were net buyers of stock futures to the tune of Rs 113.90 crore while sold stock options worth Rs 3.01 crore.