Nifty futures ended down by 6.12% at 21975 levels, with India VIX surging by 27.75%. Options data indicates major Call OI at 23000 and 22500, and significant Put OI at 21000 and 21500 strikes. Nifty futures ended down by 6.12% at 21975 levels, with India VIX surging by 27.75%. Options data indicates major Call OI at 23000 and 22500, and significant Put OI at 21000 and 21500 strikes. Economic Times