The Nifty futures open interest increased by 3.5% while the Minifity futures open interest decreased by 7.25%. The implied volatility of at-the-money options increased from 16% to 17.5%. Some stocks where the cost of carry is positive include IndiaInfo, Patni, Suntv, PirHealth and GVKPil. Cipla saw an increase in open interest of 35.97% while Cesc saw a decrease of 19.9%.