Also found in: Acronyms.
The agreement governing customers' margin accounts.
An agreement between a brokerage and a client governing a margin account. The margin agreement enables the client to borrow from the brokerage in order to buy securities. The agreement details what collateral must be placed on the account and the other duties each party must fulfill. The client must sign the margin agreement before the margin account is created.
The written document that describes the functioning of a margin account and permits a customer's broker to pledge securities in the account as collateral for loans. A customer must sign a margin agreement before undertaking trades on credit in an account. Compare customer's loan agreement.