The document provides a summary of derivative market activity in India for September 22, 2010. It notes that open interest for Nifty futures decreased by 2.74% while Minifity futures decreased by 5.82% as the market closed at 6009.05. Implied volatility of at-the-money options increased from 16% to 18%. Few stocks where cost-of-carry is positive are listed. Significant short positions exist in PATNI and it is advisable to trade SAIL with a negative bias.