Well it's not really about the numbers - the details of the collapse don't really matter. In the context of the last crash we know the global economy is brought down by financialised insanity and fraud. It's a morality play showing what's happening inside the first firm to realise the house of cards is about to collapse, and who are about to bring it down themselves by being the first out the door. The details aren't really the point.

They did go into detail about the risk and potential losses in the meeting scene.