Today Sensex closed at 18562, down by 1.6%, While Nifty future closed at 5581, also down by 1.4%.

Nifty July 2011 futures closed at 5,591.25, at a premium of 10.15 point over spot closing of 5,581.10, while Nifty August 2011 futures were at 5,607.00 at a premium of 25.90 points over spot closing. The near month July 2011 derivatives contract expires on Thursday, 28 July, 2011. Nifty July futures saw an addition of 4.54% or 0.98 million (mn) units, taking the total outstanding open interest (OI) to 22.55 mn units.

Among Nifty calls, 5600 SP from the July month expiry was the most active call with addition of 1.52 million or 23.15%. Among Nifty puts, 5600 SP from the July month expiry was the most active put with addition of 0.72 million or 11.89%. The maximum Call OI outstanding for Calls was at 5600 SP (8.08 mn) and that for Puts was at 5500 SP (6.78 mn).