買多賣空是什麼意思

"Buy long" and "sell short" are trading strategies used in financial markets, particularly in the context of stocks, but they can also apply to other types of securities. Here's what they mean:

Buy long: When an investor buys long, they are purchasing an asset with the expectation that its value will increase in the future. The investor buys the asset and holds it for an extended period, hoping to sell it at a higher price later on to make a profit. This strategy is also known as "going long" or "long position."

For example, if an investor believes that the price of Apple stock will rise in the coming months, they might buy shares of Apple with the intention of selling them at a higher price once the stock has appreciated.

Sell short: On the other hand, selling short is a strategy where an investor borrows a security and sells it immediately, with the expectation that the price will fall in the future. The investor then buys back the security at a lower price to return it to the lender, keeping the difference as profit. This strategy is also known as "going short" or "short position."

For instance, if an investor thinks that the price of Tesla stock is going to decrease, they might borrow shares of Tesla and sell them. If the stock price falls as expected, the investor buys the shares back at the lower price and returns them to the lender, keeping the difference as profit.

Both buy long and sell short strategies involve speculation and carry risks, including the risk of loss if the investor's prediction about the direction of the price is incorrect.