The short selling of shares or stocks occurs when an investor tries to profit from an expectation that a share price will fall in value.

The process involves an investor borrowing shares from a stockbroker and selling them on the market. The investor must eventually return the borrowed shares to the stockbroker. A short-selling investor will expect that the share price will fall so that they can buy the shares (to return them to the stockbroker)  at a lower price then they sold them – making a profit.