There are two aspects of it. One is being a trader, being able to buy panic, and nearly always if you are a trader or an investor, if you buy panic, you are going to do okay.
Sometimes it is better for the traders, because when there is a panic—a war breaks out or something like that—everything collapses, and some people are very good at jumping in and buying. Then, when the rally comes, the next day or the next month, they sell out.
Now, the people who are investors can also do that, but it usually takes longer for there to be a permanent rally. In other words, if there's a war and stocks go from 100 to 30 and everybody jumps in, it may rally up to 50, and then the traders will get out, it may go back to 30 again. I'm trying to make the differentiation between investors and traders buying panic.
As an investor, nearly always if you buy panic and you know what you are doing, and then hold on for a number of years, you are going to make a lot of money.
You also have to be sure that your crisis or panic is not the end of the world, though. If war breaks out, you have got to make sure it's a temporary war.
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.