Even at eight figures still makes sense for accurate value at risk calculation. A friend that works in risk management told me a financial institution you must

Even at eight figures still makes sense for accurate value at risk calculation. A friend that works in risk management told me a financial institution you must have enough cash 'at rest' to cover your part of your whole VAR. The problem here is VAR is hard to calculate. For a small bank it might be simple, but for a big one exposed to ousands of financial instruments it is not simple... ... and every million that you can have at work counts.