What Is Isolated Margin?
Isolated margin dedicates a specific amount of collateral to each individual position. If the position is liquidated, only the assigned margin is lost — the rest of your account balance remains untouched.
How Isolated Margin Works
If you open a $5,000 position with $500 isolated margin (10x leverage), your maximum loss is limited to that $500. Even if you're liquidated, the remaining $9,500 in your account is safe. The trade-off is a tighter liquidation price compared to cross margin.
Why It Matters for Traders
Isolated margin is the safer default for most traders. It enforces position-level risk management — you pre-commit to your maximum loss before entering. This prevents the catastrophic scenario where a single trade cascades through your entire account.
How It Works on CEX Perps
On centralized perpetual futures venues, isolated margin shows up in the position panel, the funding timer, or the liquidation engine rather than as a separate product. Traders usually check it next to mark price, margin mode, and open interest so they do not size a trade from last price alone.
Example numbers only (not a live quote): if you hold a $10,000 notional long with 5x leverage, your initial margin is about $2,000. A move against you of roughly 20% of that notional can push the position near maintenance margin depending on the venue formula. Always read the venue's own liquidation rule before you size.
Formula and Worked Example
Use this only as a labeled example. It is not a live market print.
- Notional = coin size × mark price.
- Initial margin ≈ notional ÷ leverage.
- Distance to liquidation depends on maintenance margin, fees, and whether you use cross or isolated margin.
Example: 0.1 BTC long, mark $60,000, leverage 10x → notional $6,000, initial margin about $600. If maintenance margin is near 0.5% of notional, a modest adverse move can close the trade even when your thesis is still intact.
Common Mistakes
- Treating a single print of isolated margin as a trade signal without checking funding, open interest, and your liquidation price.
- Mixing venue conventions (coin-margined vs USDT-margined, cross vs isolated) and reading the wrong mark.
- Copying example numbers from a glossary into live size without checking the current book depth and fee schedule.
- Ignoring related terms that change the meaning of the print on a given day.
