Hi
Today,Nifty Opened on subdued note around 4690 and gone down to a low of 4670 .Moved in the range of 4670 to 4690 , briefly touched 4700 and fallen. In the last hour of trade,Nifty showed further weakness and fallen to a low of 4640.Finally closed around 4645.
here is Nifty Option Chain of 29th Dec 11(Thurs).
Today is settlement day for Dec Series. Hence data pertains to Jan-12 Series.