Margin account (stocks)
A leverageable account in which stocks can be purchased for a combination of cash and a loan. The loan in the margin account is collateralized by the stock; if the value of the stock drops sufficiently, the owner will be asked to either put in more cash, or sell a portion of the stock. Margin rules are federally regulated, but margin requirements and interest may vary among broker/dealers.
Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University