Ahead of F&O expiry tomorrow, the market saw another volatile session of trade that ended flat but on high volumes. Experts see a short covering rally in the near-term but the trend looks weak. Sensex shut shop at 16283, down 69 points and Nifty is at 4826, down 20 points from the previous close. CNX Midcap index was up 0.58% and BSE Smallcap index was down 0.44%. The market breadth is in the negative with advances at 485 against declines of 781 on the NSE. Top Nifty gainers included Ranbaxy, Jindal Steel and Wipro while losers were Maruti Suzuki, Tata Steel and Suzlon.