The Foreign institutional investors (FIIs) were net sellers of Rs 238.88 crore in the futures & options segment on Wednesday.According to data released by the NSE, FIIs were net sellers of index futures to the tune of Rs 502.44 crore and bought index options worth Rs 28.11 crore. They were net buyers of stock futures to the tune of Rs 234.93 crore and bought stock options worth Rs 0.52 crore.