What is a Margin Account?
Cfefinances
A Margin account allows you to borrow money from your brokerage account so that that you can buy stock, make a decent amount of money and then pay back the margin account with interest. These are dangerous because you have to make money or else you have to sell right away to pay off the margin or else you will owe your brokerage account money.
Think about borrowing from your broker to buy more stock than your cash allows. It's risky — if trades go wrong you may have to sell fast or owe the broker.