But that exactly is one of those fallacies. If 2019ncov "tears the world a new ..." then your shares are going to be worth about the same as bills in your hand:

But that exactly is one of those fallacies. If 2019ncov "tears the world a new ..." then your shares are going to be worth about the same as bills in your hand: nothing. Nobody will seriously risk their health for money. And what's the rational thing to do in such a case? Let's say you're at a poker game. And you have a deal: you lose, you get shot, you win, you get your winnings. What is the rational thing to do? You should go all-in. It is one of the very few cases it is actually rational to do that.