Short Selling a Stock Lets You Bet Against a Company, But It Comes with Major Risks – Money Badger

4 words, unlimited losses, limited gains. The lowest a stock can go is zero, which limits your gains on a short. Your losses are unlimited (note, your broker will give you a margin call and force you to close position in real life) losses if a stock keeps rising

http://moneybadger.stocktwits.com/what-is-short-selling/