Template:Margin loan
A margin lending transaction is one where one party lends money to another so it can buy or sell securities. The lender will lend up to a certain value of the securities. If the securities fall in value, the lender may ask the borrower to post margin to cover the value of the margin loan.
Usually the borrower lets the lender hold the securities as collateral for the margin loan. The borrower may also allow the lender to use those securities in the market to offset its funding costs of making the margin loan.