What is Collateral?
Collateral is the asset a trader deposits with a perpetual futures exchange to back open positions. It secures potential losses, sets available leverage, and absorbs adverse price moves before liquidation. Collateral can be a stablecoin such as USDC or a volatile asset like BTC or ETH.
Collateral is the balance an exchange holds against your open positions. When you open a perpetual, the venue reserves part of your collateral as initial margin and continuously marks it against unrealized PnL. As long as your collateral stays above the maintenance-margin requirement, the position stays open; once it falls below, the engine liquidates.
Collateral comes in two broad flavors. Stablecoin collateral (USDC, USDT) holds a fixed dollar value, so your margin buffer only moves with position PnL. Volatile collateral (BTC, ETH) is itself priced in real time — if it drops, your account equity drops even before the trade moves, which can trigger liquidation faster than expected. Some venues also apply haircuts, valuing $1,000 of ETH collateral at, say, $900 of margin power.
Cross-margin shares one collateral pool across all positions, while isolated margin walls off a fixed amount per trade. The choice changes how a single losing leg can drain the buffer protecting the others.
For funding-rate arbitrage, collateral management is the whole game. A delta-neutral trade holds a long on one venue and a short on another, so directional PnL nets to roughly zero — but each leg needs its own collateral, and each can be liquidated independently if that venue moves against it before the other rebalances. Using stablecoin collateral on both legs keeps the neutral hedge clean; using volatile collateral introduces a second, unwanted directional exposure through the collateral itself. Sizing collateral so both legs survive normal volatility, and reserving spare margin for funding outflows and fees, is what keeps a carry trade alive long enough to actually collect the funding spread.
Collateral and liquidation buffer on a BTC long
- •Deposit: 5,000 USDC collateral (stablecoin, no haircut)
- •Position: long 1 BTC at $60,000 = $60,000 notional
- •Leverage: $60,000 / $5,000 = 12x
- •Maintenance margin at 0.5%: $60,000 x 0.005 = $300
- •Liquidation buffer: $5,000 - $300 = $4,700 of adverse move absorbed
- •Approx liquidation price: ~$55,300 (about a 7.8% drop)
- •In a delta-neutral carry, an equal short elsewhere offsets this move — but that short needs its own ~$5,000 collateral pool.
Stablecoin vs volatile collateral
| Property | Stablecoin (USDC) | Volatile (BTC/ETH) |
|---|---|---|
| Margin value | Fixed at $1 | Fluctuates with spot price |
| Haircut | Usually none | Often 5-20% haircut applied |
| Adds directional risk | No | Yes — collateral itself can fall |
| Effect on delta-neutral hedge | Keeps hedge clean | Introduces extra exposure |
| Liquidation trigger | Only from position PnL | From position PnL or collateral drop |
FAQ
What is collateral in perpetual futures?
It is the crypto or stablecoin you deposit with an exchange to back your open positions. The venue reserves part of it as margin and uses the rest as a buffer that absorbs losses before your position is liquidated.
Does the type of collateral affect funding arbitrage?
Yes. Stablecoin collateral holds a fixed dollar value and keeps a delta-neutral hedge clean. Volatile collateral like BTC or ETH can fall in value on its own, adding unwanted directional risk and pulling your account toward liquidation even when the trade itself has not moved.
How does collateral relate to leverage?
Leverage equals position notional divided by collateral. With $5,000 of collateral backing a $60,000 position you run 12x leverage. More collateral lowers leverage and widens the buffer between your entry and your liquidation price.
Why keep spare collateral in a carry trade?
Each leg of a funding arbitrage can be liquidated independently, and funding payments plus fees continuously draw down your balance. Reserving extra collateral beyond the minimum margin lets both legs survive normal volatility long enough to collect the funding spread.
See collateral live across 36 exchanges.
Open Funding Screener →