The Sensex shut up at 16467, down by 34 points, While Nifty shut up at 4941 down by 6 points. The index touched high and low of 5,030.15 and 4,911.05 respectively.

Nifty September 2011 futures closed at 4,941.00 at a premium of 0.05 points over spot closing of 4,940.95, while Nifty October 2011 futures were at 4,950.10 at a premium of 9.15 points over spot closing. The near month September 2011 derivatives contract expires on Thursday, September 29, 2011. Nifty September futures saw addition of 6.95% or 1.85 million (mn) units, taking the total outstanding open interest (OI) to 28.59 mn units.

Among Nifty calls, 5000 SP from the September month expiry was the most active call with addition of 1.37 million or 26.45%. Among Nifty puts, 4900 SP from the September month expiry was the most active put with addition of 0.094 million or 1.63%. The maximum Call OI outstanding for Calls was at 5000 SP (6.56 mn) and that for Puts was at 4900 SP (5.89 mn).