What is Margin?
Why this matters
Margin is the collateral that backs your leveraged position. If you do not understand margin, leverage is just a scary slider.
Every liquidation, every "insufficient margin" error, and every forced close starts with how much collateral you posted and how the exchange measures risk.
Margin Is Collateral
When you open a perpetual position, you lock (or allocate) margin as a performance bond. That collateral covers adverse price moves.
It is not a fee you pay to open. It is capital at risk. If the trade works, margin is released when you close. If it fails, losses come out of that collateral.
- Margin = skin in the game for leveraged trades
- Notional can exceed margin; risk still sits on your account
- Fees and funding are separate from margin requirements
Initial Margin
Initial margin is the minimum collateral required to open a position at a given size and leverage.
Example: $1,000 notional at 10x may require about $100 initial margin (simplified). If you do not have it, the order rejects.
- Sets the door price to enter a leveraged trade
- Higher leverage → lower initial margin for the same notional
- Lower initial margin = thinner buffer immediately
Initial Margin Buffer
Show account equity allocating initial margin to open a position, with remaining free collateral.
Maintenance Margin
Maintenance margin is the minimum equity you must keep to hold the position open. If your equity falls below this level, liquidation begins.
Initial margin gets you in. Maintenance margin keeps you in. The gap between them is your survival room after entry.
- Breach maintenance → liquidation risk
- Volatile markets eat the buffer faster
- Adding margin can restore the buffer (if you choose to)
Isolated vs Cross (Brief)
Isolated margin assigns a fixed collateral pot to one position. If it liquidates, losses are capped near that allocation (fees/slippage aside).
Cross margin shares collateral across positions. A winner can support a loser — and a loser can drain the shared pot. More efficient, more contagious.
- Isolated: contain blast radius per trade
- Cross: capital efficient, correlated risk
- Beginners often prefer isolated until they understand portfolio risk
How Margin Relates to Leverage
Leverage and margin are two views of the same relationship. Higher leverage means less margin per unit of notional. Lower leverage means more margin posted for the same size.
You can lower risk by reducing notional, adding margin, or both. Sliding leverage without changing dollar risk is self-deception.
- Same notional, higher leverage → less margin locked
- Same margin, higher leverage → larger notional (more risk)
- Always translate to: "How many dollars can I lose?"
Key Takeaways
Remember these points
- •Margin is collateral backing leveraged exposure — not a ticket fee.
- •Initial margin opens the trade; maintenance margin keeps it alive.
- •Isolated contains risk; cross shares it across the account.
- •Leverage and margin describe the same risk relationship.
- •Think in dollars at risk, not just margin percentage labels.
Common Mistakes
Treating margin as the maximum loss
On cross margin, or with gaps and fees, outcomes can be messier than "I only allocated $100." Know mode and liquidation mechanics.
Ignoring maintenance margin
Opening with barely enough initial margin leaves almost no room for normal volatility.
Mixing cross and oversized correlated positions
Three "small" longs on highly correlated coins can liquidate together under cross margin.
Quiz
0/4 answered1.Initial margin is best described as:
2.If equity falls below maintenance margin:
3.Isolated margin primarily helps you:
4.Raising leverage while keeping the same notional generally:
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