What is Maintenance Margin?
Maintenance margin is the minimum amount of equity you must keep in a margin account to hold an open leveraged position. If losses push your equity below this level, the account is undermargined and the broker may issue a margin call. The required level is set by the broker and the exchange and can change with volatility.
Why Maintenance Margin matters
It is the line where a losing position forces action, either adding funds or having the broker close it.
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