For what I understand only 5-10% is needed when trading MCX whereas 30-50% is needed when trading NSE futures. Why so much difference? Does this data mean that MCX is less risky than NSE futures?
Margin required is determined using the SPAN methodology (CME trademarked product). Check this link on how SPAN calculation works.
The formula/logic used to determine margin using SPAN is same across NSE and MCX. The reason margin required is lesser for MCX is because of the lower price volatility (in terms of price range) in the underlying. Same reason why it is much lesser for currency. It is the same reason why index futures require lesser margin than stock futures.
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