I think the Swiss Bank intervention is the classic black swan story. The model really only works until somebody puts their foot in it. Risk management looks at

I think the Swiss Bank intervention is the classic black swan story. The model really only works until somebody puts their foot in it. Risk management looks at the usual processes via stochastic modelling, but you need to also make scenario analysis, where you just make a deterministic event happen and then measure the effect on the value of your portfolio.