Today sensex closed at 16498, up by 157 points, The index touched a high and a low of 16,549.21 and 16,213.18 respectively. While Nifty shut up at 4949, up by 90 points, the index touched high and low of 4,965.80 and 4,863.80 respectively.

Nifty August 2011 futures closed at 4,944.95, at a discount of 3.95 points over spot closing of 4,948.90, while Nifty September 2011 futures were at 4,951.00 at a premium of 2.10 points over spot closing. The near month August 2011 derivatives contract expires on Thursday, August 25, 2011. Nifty August futures saw addition of 12.21% or 2.49 million (mn) units, taking the total outstanding open interest (OI) to 22.96 mn units.

Among Nifty calls, 4900 SP from the August month expiry was the most active call with an addition of 0.36 million or 11.41%. Among Nifty puts, 4900 SP from the August month expiry was the most active put with an addition of 1.48 million or 38.81%. The maximum Call OI outstanding for Calls was at 4900 SP (3.54 mn) and that for Puts was at 5000 SP (5.31 mn).