What does this imply … that IB thinks there is no risk associated with Currencies, Bonds, Agricultural products, Metals, Natural Gas etc etc … or is it all simply too hard so let’s just use a naïve 30% move measure to a couple of sectors and ignore the rest of the portfolio. Further not taking into account that the remainder of the client’s portfolio may contain assets that have some degree of negative correlation with equities thereby reducing risk levels.
indeed.. IB has over-simplified margin calculation
they don't even bother if you have negative-correlated products in the same sector
given their size, IB should have a much better risk management system