In my experience, it's possible to sell without buying a stock through a method called short selling. This strategy involves borrowing stocks from a broker and selling them with the hope of buying them back later at a lower price. It's a high-risk strategy as potential losses are infinite if the stock price increases. So, while it's a way to potentially profit from a stock's decline, it does require careful planning and risk management. Remember, it's always vital to understand any financial strategy thoroughly before diving in.