A margin account is a type of brokerage account that allows you to trade stocks using leverage. To open a margin account, you'll need to deposit cash or securities with your broker as collateral. Once the account is opened, you'll be able to borrow money from your broker to buy stocks. Just be aware that there may be interest charges on the money you borrow, and if the value of the securities in your account falls below a certain level (known as the margin call).