One thing that one could do ALSO, If you don't own any stock right now, is to go out and start selling it short. Which essentially would have the same effect. If A LOT of people are going to sell AND people also started selling short, It would magnify the downward pressure on the price. AND, you would MAKE money if the price actually did move down. Provided that you cover your position before it starts to move back up, of course. If it does move back up that is.