The foreign institutional investors (FIIs) were net sellers to the tune of Rs 15.26 crore in the futures & option segment on Wednesday.According to data released on the NSE website, FIIs were net sellers of index futures to the tune of Rs 227.25 crore and they sold index options worth Rs 21.19 crore. They were net buyers of stock futures to the tune of Rs 231.60 crore and they bought stock options worth Rs 1.58 crore.As per data available on the Sebi website - FIIs were net sellers of stocks worth Rs 214.70 crore in the spot market on Tuesday. Domestic mutual funds (MFs) were net sellers of shares worth Rs 60.09 crore on the same day.