Market experts recommend buying defensive stocks, if one has to, during periods of volatility. Siddharth Sedani, AVP of portfolio management services at Microsec Capital, recommends investing in RIL, HUL and Petronet LNG. He remains bullish on the oil and gas space. Hitendra Vasudeo, technical analyst, www.stockmechanics.com, recommends looking for a mild rally to exit Unitech shares. He recommends a stop loss of 17 on Unitech, and sees a strong resistance at 25.