Business and Personal Finance Dictionary

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• MAINTENANCE MARGIN REQUIREMENT
  
  A sum, usually smaller than but part of the original margin, that must be maintained on deposit at all times. If a customer's equity in any futures position drops to or below, the maintenance margin level, the broker must issue a margin call for the amount at money required to restore the customer's equity in the account to the original margin level. Related: Margin, margin call.
  
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