Long Term Nifty Options 2010/11 expiry

#1
Dear friends,

Is anyone here buying or selling the 2010 and 2011 Nifty options? If you do - two questions for you.

1. Which brokerage are you using? I can't find anyone other than Geojit letting me buy/sell these options.
2. Do you have any idea how the margin is calculated? I would be interested in knowing the factors involved in the calculation. [They claim the method is proprietary (derived from PC-SPAN).] Reason: the spike of Monday caused a 2.5 times increase in the margin requirement on my positions, which came down to 1.05x on Wednesday without any discernible change in any other factors that I think should have caused it.

Regards,
RV
 

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