Position margin is the collateral amount or margin requirement associated with an existing leveraged position. Platforms use the label differently: it may describe initial margin, allocated isolated collateral, or a displayed amount that also reserves estimated closing fees. The field’s definition matters before comparing it with position value or returns.
Support is different from exposure
For a simplified linear contract using notional divided by leverage, 6,000 USDT of notional at 10× requires 600 USDT of initial margin before fees or other adjustments. The market exposure is still 6,000 USDT, not 600 USDT.
An isolated position may receive extra collateral beyond its initial requirement. That can increase its loss-absorption buffer without increasing quantity. In cross margin, a position’s displayed margin is not necessarily a wall separating it from the rest of the account’s eligible funds.
Read changes alongside account risk
Position margin can change with size, reference prices, leverage settings, risk tiers or manual adjustments. Depending on the system, funding and realized charges can also change the resources available to support it.
Maintenance margin is the minimum ongoing requirement used in risk checks, rather than a synonym for every position-margin display. Releasing collateral or reducing a displayed amount may leave less room for adverse moves. Whether funds can be removed depends on the account’s current requirements.