> This would never happen though, as they trade so rapidly most banks probably don't even know at any given time what would happen to their derivitives liabilit

> This would never happen though, as they trade so rapidly most banks probably don't even know at any given time what would happen to their derivitives liability if the market swung wildly, either up or down. I think the technology is there to make it happen automatically. It's a deterministic system. The problem is the lack of political will to do so, which is appalling and leads to situations like Brexit and Trump.