A lot of people buy stocks, hoping they will go up in value. But it is possible to bet in the opposite direction. You can bet against a stock, hoping it will plunge. It's called "shorting" a stock.
Most people don't short stocks, and we wondered why. So we decided to short something ourselves.
We had no idea what to short, or how to do it. So we asked the well-known short seller Andrew Left of Citron Research for advice. He interrupted me before I could finish explaining our plan.
"Don't do it," he said.