I suppose you're right and that's why I wrote "virtually zero" and not "no chance whatsoever". Not only does significant breaking news have to happen while you

I suppose you're right and that's why I wrote "virtually zero" and not "no chance whatsoever". Not only does significant breaking news have to happen while you are in the position, which is already very rare, it has to happen in a way in which you cannot respond and cut it off -- like the stock getting halted. Most intraday stock halts that occur are not exactly a shock (like a biotech or a stock under investigation of any kind) so if you are highly leveraged on that stock to the point where your entire equity can get hurt, that's on you. If something big like GE or AAPL halts, the move proably won't be extraordinarily huge like 20%+, unless it's an Enron scenario.