What is the difference between the exchange margining system and the VaR you provide?
Exchanges have lately moved to VaR based margining system. TransRisk estimates risk on the total portfolio risk (VaR) and also individual positions. Unlike the Exchange margining system, the risk capital/margin that TransRisk computes takes into account the benefit from the correlation between each and any two assets of the portfolio. Moreover TransRisk considers the physical/cash market positions also for estimating the risk capital.