Adapting Your Model to Changes in the Market

When you go through a substantial macro event does that send you back to your models to tweak them do those giant events affect how markets behave subsequently and that leads you to have to make some changes. imagine so when the British referendum happened well we didn't have such an event before in the market so that's not something where you want to make your model adapted to. If you have other phenomenon like you know changes in correlations between assets or changes in the level of volatility these are things that you want the model to adapt to going forward  and incorporate this information into the model.