Margin
From ACT Wiki
1.
Accounting.
Profit margin measures the surplus of revenues over relevant costs, often expressed as a percentage.
2.
Bank lending.
Lending margin is a percentage amount added to a market reference rate, to calculate the total rate of interest payable by a borrower.
3.
Futures markets.
Margin is a refundable cash deposit payable by market participants to protect other participants in the market against the risk of a default.