Foreign portfolio investors (FPIs) were sellers of index futures and options and stock futures and options.FPIs offloaded equities worth Rs 2,806 crore, while domestic institutional investors bought equities worth Rs 221.5 crore.FII open interest in Nifty futures increased and the long-short ratio for foreign investors rose to 1.48.The most active open interest was observed at 23,000 call strikes and 25,400 put strikes for the Nifty 50 April 9 expiry series.