Isolated Margin
Understand isolated margin in crypto derivatives: position-specific collateral, effective leverage, maintenance margin, liquidation and top-up risk.
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Isolated margin allocates a defined pool of collateral to a specific position or position group. This can limit how much unrelated account equity is automatically consumed by that position, but it does not eliminate liquidation, slippage, gap or venue risk.
What “isolated” means
Under isolated margin, the venue tracks collateral for a particular position separately from other available account balances. Losses on that position generally consume the allocated margin rather than automatically drawing on all eligible account equity.
Benefit
Blast radius can be constrained: one position is less able to consume collateral assigned elsewhere.
Trade-off
Less shared collateral means the position may liquidate sooner than an equivalent cross-margined position.
Notional exposure versus collateral
A £10,000 position backed by £2,000 isolated collateral begins with 5× notional-to-collateral exposure. That does not mean a 20% adverse move is safely absorbable. Maintenance margin, fees, funding and liquidation buffers reduce the usable loss distance.
Higher leverage compresses the percentage move between entry and a margin shortfall. It does not increase the quality of the underlying trade thesis.
Maintenance margin and liquidation
Venues require equity/margin to remain above maintenance requirements. If the isolated position’s margin balance becomes insufficient under the venue’s mark-price and maintenance formula, the liquidation engine can reduce or close the position.
- maintenance rates may rise with position size;
- funding and fees can reduce margin over time;
- liquidation uses a venue-defined reference, often mark price;
- execution can occur at prices worse than the trigger;
- insurance funds/ADL can matter after bankruptcy-price mechanics.
Worked example
A trader holds £10,000 notional with £2,000 isolated collateral—5× simple initial leverage. Ignore maintenance margin and costs momentarily.
A 10% adverse move creates roughly a £1,000 unrealised loss, consuming half of the initial collateral. A 15% move creates roughly £1,500 loss. In reality, liquidation may occur before the full £2,000 is lost because the venue requires maintenance margin and may include fees/funding.
The useful insight is not “liquidation occurs at exactly 20%”. The insight is that small percentage market moves become large percentage changes in margin equity when notional is several times collateral.
Common mistakes and misunderstandings
- Assuming isolated margin guarantees losses cannot exceed allocated collateral.
- Using 1/leverage as the exact liquidation-distance formula.
- Adding margin repeatedly without reassessing the invalidated trade thesis.
- Ignoring maintenance tiers, funding and mark-price rules.
- Confusing lower account contagion with lower position risk.
Knowledge checkpoint
Q1. Why can an isolated position liquidate before all allocated collateral is lost?
Q2. What risk does isolated margin reduce relative to cross margin?
Q3. Why is 5× leverage better understood as notional-to-collateral exposure than a guaranteed liquidation distance?
Q4. What should be reassessed before adding more isolated margin?
FAQ
❓ Does isolated margin cap my loss?
It can constrain collateral available to a position, but exact loss and liquidation outcomes depend on venue rules, fees, gaps and execution.
❓ Can I add margin to an isolated position?
Many venues allow this, but the mechanics and resulting liquidation price are venue-specific.
❓ Is isolated margin safer than cross margin?
It reduces cross-position contagion, but may increase the chance that the isolated position liquidates because it cannot use wider account equity.
❓ Is 10× leverage a 10% liquidation distance?
No. Maintenance margin, fees, mark-price rules and contract design mean the relationship is not that simple.
Summary
- Isolated margin allocates collateral to a specific position.
- It can limit account-wide contagion but not position risk.
- Leverage magnifies margin-equity sensitivity to price moves.
- Liquidation calculations must use the venue’s actual maintenance and mark-price rules.
Use this lesson as one component of a wider risk and execution process. Derivative specifications, margin formulas, settlement and loss-allocation rules can differ substantially between venues.
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