The foreign institutional investors (FIIs) were net buyers to the tune of Rs 227.63 crore in the futures & option segment on Wednesday.According to data released on the NSE website, FIIs were net buyers of index futures to the tune of Rs 90.46 crore, while they bought index options worth Rs 24.55 crore. They were net buyers of stock futures to the tune of Rs 110.79 crore and stock options worth Rs 1.84 crore.