Aggregate Maintenance Margin

Aggregate Maintenance Margin is the total collateral required to support all open positions within a cross-margin account. It is the sum of the maintenance margin requirements for every individual position, adjusted for any offsetting risks or portfolio benefits allowed by the exchange.

If the total account equity falls below this aggregate level, the entire account is at risk of liquidation. Monitoring this aggregate figure is more important than tracking individual position margins because it reflects the true health of the account.

Traders use this metric to determine how much additional leverage they can safely assume or when they need to reduce exposure. It is the primary indicator of whether a portfolio is over-leveraged in a cross-margin setup.