The BSE Index shut up at 16470, down by 371 points with a huge down, the index touched a high and a low of 16,916.81 and 16,433.31 respectively. While Nifty Index closed at 4944, down by 122 points, the index touched high and low of 5,078.60 and 4,932.15 respectively.

Nifty August 2011 futures closed at 4,931.10, at a discount of 13.05 points over spot closing of 4,944.15, while Nifty September 2011 futures were at 4,940.00 at a discount of 4.15 points over spot closing. The near month August 2011 derivatives contract expires on Thursday, August 25, 2011. Nifty August futures saw addition of 12.04% or 2.69 million (mn) units, taking the total outstanding open interest (OI) to 25.07 mn units.

Among Nifty puts, 5000 SP from the August month expiry was the most active put with contraction of 0.83 million or 11.95%. The maximum Call OI outstanding for Calls was at 5100 SP (4.84 mn) and that for Puts was at 5000 SP (6.11 mn). The respective Support and Resistance levels are: Resistance 5037.78-- Pivot Point 4984.96 -- Support 4891.33.