“But if you short sell that company at $ 5 and then the price, instead of going down, starts going higher and higher, then there won’t be any limit to your loss. The price may go to $ 10, $ 20, or $ 100, and still there will be no limit to your loss. Your broker wants those shares back. Not only can you lose all of the money in your account, but your broker can also sue you for more money if you do not have sufficient funds to cover your shorts.”

— How to Day Trade for a Living: Tools, Tactics, Money Management, Discipline and Trading Psychology by Andrew Aziz