"I used to work with Roy Neuberger, who was one of the great traders of all time, and whenever stocks would panic down, he was usually one of the few buyers, because he knew he could get a rally―if not that day, at least maybe that week or that month. And he nearly always did. No matter how bad the news, especially if there's a huge drop, it's probably a good time to buy if you've got the staying power and your wits, because you will likely get a rally. In terms of panic buying or crisis situations, that's normally the way to play.
Now, it's not always easy, because you are having everybody you know, or everybody in the media shrieking what a fool you are to even try something like that. But if you have your wits about you and you know what you are doing, and you know enough about yourself, then chances are you will make a lot of money."