Hi @NapoleonDynamite, you are right that hedge fund managers are asked to disclose a lot of information to potential investors. In fact, it is customary for them to be sent a questionnaire which may look like this:
Having said that, as a trader you can disclose as much as you like, but the only way to be safe from an event like this really comes down to using LOW LEVERAGE. By that I do not mean 50x, no. I mean 3 or 4x max. That means that your portfolio could weather wild swings of 10-15% without being at risk of blowing up.
This culture of traders/brokers demanding/offering leverage of hundreds of times should come to an end for the benefit of the whole industry. But, of course, who can say 'no' to a sweet?
@Medialux I did not follow the events that closely, but are you saying that President Hollande was giving a statement on Brexit at 1am CET? Perhaps he was in a different time zone while in an official visit?