1. credit transaction; dealings on credit; margin transaction; margin trading
Wikipedia definition
2. Margin (finance)In finance, a margin is collateral that the holder of a financial instrument has to deposit to cover some or all of the credit risk of their counterparty. This risk can arise if the holder has done any of the following: borrowed cash from the counterparty to buy financial instruments, sold financial instruments short, or entered into a derivative contract. The collateral can be in the form of cash or securities, and it is deposited in a margin account.
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