The Tool Desk
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Perpetual futures have no ordinary expiry, but they are not simple spot holdings. Leverage magnifies gains and losses, maintenance-margin rules can force a close, funding can steadily consume equity, and a venue may liquidate from its mark price while the chart’s last-trade candle appears not to have reached the displayed liquidation level.
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What a crypto perpetual future is—and why “safe” is conditional
A crypto perpetual future is a derivative contract that normally has no ordinary expiration date. It gives you leveraged exposure to an underlying asset while periodic funding payments transfer value between long and short holders. The funding mechanism is designed to keep the perpetual contract close to an index or spot reference. Coinbase describes perpetual-style futures as combining “no expiration, leverage, and 24/7 access.” Those features are convenient, but they also mean a position can remain open through weekends, overnight volatility and repeated funding debits.
Safety depends on the contract, venue, jurisdiction, collateral and your loss limit—not on a single leverage number. The same nominal leverage can produce very different liquidation distances when maintenance-margin tiers, fees, funding, mark-price methodology or collateral assets differ. The CFTC warns that “Entering into futures contracts through leveraged accounts can amplify the risks of trading the product.” In practical terms, a trader can be required to add margin or close a position and may lose more than the initial amount deposited.
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Check that the product is permitted where you live
Before transferring funds, verify that the venue and the specific perpetual contract are legally available in your jurisdiction. Read the current contract specification, customer agreement, collateral rules, liquidation policy and withdrawal terms. Legal treatment is not uniform: a CFTC announcement dated May 29, 2026, categorized certain crypto perpetuals as foreign futures under specified conditions, but that does not make every perpetual, venue or customer arrangement lawful everywhere. Your location, customer status and the exact product can change the answer.
Leverage: what the number means and why maximum is not a target
Leverage is the contract’s notional value divided by the initial margin required to open it:
Leverage = position notional ÷ initial margin.
If a position has $10,000 of notional exposure and requires $500 of initial margin, its opening leverage is 20x. A 1% adverse move in the underlying then changes the position’s gross value by about $100 before fees, funding and maintenance-margin effects—20% of the $500 initial margin. A 5% adverse move can consume approximately the entire posted margin on a 20x position, which Coinbase uses as an illustrative relationship. Actual liquidation can occur sooner or later because venues apply maintenance tiers, mark price, fees, funding and other risk rules.
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Leverage multiplies exposure; it does not reduce the economic risk of the underlying asset. Selecting 50x because an interface permits it simply makes the liquidation buffer thinner. A low nominal setting can still be dangerous if the position is oversized relative to your account or if the collateral is highly concentrated.
How to choose leverage without guessing
- Define the maximum cash loss you can accept on this trade, separate from your emergency fund, rent, debt payments and long-term investments.
- Choose the stop or invalidation level that would show the trade idea is wrong. Use a realistic distance for the asset’s volatility rather than moving the stop closer just to justify more leverage.
- Estimate the loss at that distance from the proposed notional position, then add expected entry and exit fees plus a funding allowance for the intended holding period.
- Reduce the notional size until the total planned loss fits your pre-set cash limit. Only then select the lowest leverage setting that supplies that margin requirement.
- Leave unused collateral outside the position when possible. A lower account-level exposure gives mark-price fluctuations more room before maintenance requirements are breached.
This process may result in the same position being opened at 2x, 5x or 10x depending on the account size and stop distance. There is no evidence-based universal threshold that can be called safe for every trader or contract.
Initial margin, maintenance margin and margin ratio
Initial margin is the collateral required to open a position. Maintenance margin is the minimum equity the venue requires to keep that position open. Because maintenance requirements commonly rise with position size through risk tiers, the margin needed to avoid liquidation is not simply a fixed percentage of the original deposit.
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Your position becomes vulnerable when account or position equity no longer covers the maintenance requirement. Venues express this with a margin ratio or a similar risk metric. Coinbase defines margin ratio as maintenance margin required divided by total equity and lists 100% as the liquidation threshold for its US derivatives account. That 100% figure is a venue-specific example, not a universal crypto rule; another venue can use a different formula, trigger, warning band or partial-liquidation sequence.
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What changes your margin ratio
- Unrealized profit or loss: an adverse move reduces equity; a favorable move increases it.
- Maintenance tier: a larger notional position can move into a higher tier with a larger required maintenance amount.
- Trading fees: opening, closing and liquidation fees reduce available equity.
- Funding: recurring debits reduce margin; credits increase it only when you are the receiving side.
- Collateral value: non-USD or non-stablecoin collateral can change value while the position is open, and venues may apply haircuts.
- Other positions and orders: cross-margin accounts can share gains, losses and collateral across positions; open orders can reserve margin.
- Schedule changes: a venue can raise requirements during volatile, overnight or weekend windows. Coinbase notes that margin requirements may rise in such periods.
Isolated margin versus cross margin
Margin mode determines which collateral is available to absorb a position’s losses. The labels are common, but the exact definitions and automatic-transfer behavior are venue-specific, so read the contract documentation before relying on either mode.
| Feature | Isolated margin | Cross margin |
|---|---|---|
| Collateral pool | Collateral is assigned to a particular position under the venue’s isolated rules. | Eligible account collateral and the profit or loss of other positions may be shared under the venue’s cross rules. |
| Primary benefit | Limits the collateral allocated to that position, making the maximum intended loss easier to ring-fence. | Uses account equity more efficiently and can reduce liquidation risk for one position when other positions have offsetting equity. |
| Primary danger | The position can liquidate sooner because it cannot draw on unallocated account funds; adding collateral increases the amount at risk. | A losing position can consume collateral intended for other trades and potentially place the broader account at risk. |
| Best use case | A single trade with a separately defined loss budget and no desire to expose the rest of the account. | A deliberately managed portfolio where shared collateral, correlations and hedges are monitored continuously. |
Isolated does not guarantee that the loss equals your initial deposit: fees, funding, price gaps and venue rules can affect the final result. Cross does not mean positions are automatically hedged. Document exactly which balances, currencies and positions the venue includes before choosing a mode.
Liquidation price: what it is and why it can move
The displayed liquidation price is an estimate of where the venue’s risk engine expects equity to fall through its maintenance requirement under its current assumptions. It is not a guaranteed execution price or a permanent line on the chart. The estimate can change when the position size, maintenance tier, fees, funding, collateral, mark price or account balance changes.
Mark price versus last traded price
Many derivatives venues trigger risk checks with a mark price, an index-based fair price, rather than the most recent trade. CFTC comment materials explain that mark prices are used to reduce the effect of volatile or manipulable last trades and to liquidate when the position falls below maintenance margin. The mark price can therefore reach the liquidation threshold even when the last-trade price shown on a chart appears not to have touched it.
The index is usually built from one or more spot-market references, but its constituents, weighting, update frequency, fallback behavior and disruption rules differ by venue. Read that methodology instead of assuming that the chart’s candle, a different exchange’s price or an indicative index is the liquidation reference.
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Why liquidation can happen before your displayed number
- The mark price, not the last trade, crossed the trigger.
- Funding or trading fees reduced equity after the estimate was displayed.
- The position moved into a higher maintenance-margin tier.
- A collateral asset fell in value or a haircut changed its effective value.
- The venue widened a requirement during an exceptional-volatility, overnight or weekend window.
- Slippage or a price gap produced execution below the trigger.
- Another cross-margin position used shared collateral or generated a loss.
Partial and full liquidation
Some venues reduce a position in stages; others can close it more aggressively once the risk threshold is reached. The liquidation process may include a liquidation fee, insurance-fund transfer or loss-sharing mechanism. Compare these rules before trading rather than inferring them from the order ticket.
Funding rates: the recurring cost or credit
Funding is a periodic transfer between long and short holders intended to keep a perpetual contract aligned with its index. Depending on the funding rate and your side of the trade, you pay or receive it. Funding is separate from the opening margin and can materially change a position held for hours, days or longer.
Binance explains that when the account balance is insufficient, funding can be deducted from position margin and change the liquidation price. The same practical risk applies wherever funding is charged against collateral: a position that was comfortably buffered at entry can become vulnerable after repeated debits. A funding credit is not guaranteed income; the rate, interval, cap and payer/receiver convention are venue- and contract-specific.
How to budget for funding
- Record the contract’s funding interval, next funding timestamp, rate formula and any cap or floor.
- Estimate the notional amount that will be charged at each interval, not merely the margin deposit.
- Model both a neutral-rate case and an adverse-rate case for the full planned holding period.
- Keep enough free collateral to absorb the adverse case without approaching the maintenance threshold.
- Recalculate after the position size, side, funding rate or holding period changes.
Funding can make a trade unprofitable even when the market price moves in your direction. Include it in the maximum-loss calculation and in any decision to hold through a funding timestamp.
A safer operating procedure, from venue check to exit
1. Verify the venue and contract
Confirm legal availability in your jurisdiction, the permitted customer category, supported collateral, contract multiplier, index components, funding schedule, maintenance tiers, liquidation process, insurance or loss-sharing rules, fees, liquidity, custody controls and withdrawal restrictions. Save the current terms because specifications can change.
2. Define the trade before opening the ticket
Write down direction, entry range, invalidation level, planned exit, maximum cash loss, maximum holding time and the funding allowance. Decide whether the trade is isolated or cross before submitting it; changing modes after entry may be restricted or may alter risk immediately.
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3. Size from the loss limit
Use this planning relationship:
Position loss at stop ≈ notional × adverse price move percentage.
Then add estimated entry fee, exit fee, expected funding and a slippage allowance. If the combined amount exceeds the loss limit, reduce notional or reject the trade. Leverage is selected after sizing, not before it.
4. Place protective orders deliberately
Check whether the stop is triggered by last price, mark price or another reference; a stop that uses a different trigger from liquidation can behave unexpectedly. Confirm reduce-only settings where appropriate, available liquidity, trigger direction and whether the order remains active after partial fills. Do not assume a stop can execute at its trigger during a gap.
5. Maintain a liquidation buffer
Keep the planned exit materially farther from the estimated liquidation price than the asset’s normal short-term fluctuation. The exact buffer must reflect volatility, liquidity, mark-price behavior, funding and the venue’s maintenance tiers. A displayed liquidation price is an estimate, so treating it as the stop itself leaves no room for fees, mark-price divergence or execution slippage.
6. Monitor the risk engine, not only the chart
- Mark price and the underlying index.
- Margin ratio, maintenance amount and the next risk tier.
- Available collateral and reserved margin for open orders.
- Funding rate, next funding time and cumulative funding paid or received.
- Unrealized and realized profit or loss, including fees.
- Venue notices about maintenance changes, trading halts or contract updates.
Set alerts before the venue’s warning band, not at liquidation. A warning threshold is a prompt to reduce risk, not permission to wait for forced action.
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Closing part or all of the position, cancelling margin-consuming orders or reducing notional can restore distance from the threshold. Adding collateral can lower the immediate ratio, but it increases capital at risk and does not repair a trade whose loss limit has already been reached. Treat an added deposit as a new risk decision, not an automatic rescue.
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8. Recheck after every update
Review liquidation, funding, withdrawal and collateral rules whenever the venue changes its contract, risk tiers, index, fee schedule or maintenance policy. A strategy that was acceptable under yesterday’s tier can become under-collateralized under a new one.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare venues and contracts
“Maximum leverage” is a poor comparison metric. Evaluate the complete risk design:
| Comparison area | Questions to answer |
|---|---|
| Legal availability | Is this product permitted for your jurisdiction and customer category? |
| Effective leverage | What notional can you actually hold after account limits, maintenance tiers and collateral haircuts? |
| Margin tiers | What are the initial and maintenance requirements at your intended size, and when do they step up? |
| Collateral mode | Which balances are shared in cross mode, and exactly what isolated collateral can be added or removed? |
| Mark and index | Which markets feed the index, how often is it updated, and what price triggers liquidation? |
| Funding | What is the formula, interval, cap, settlement timestamp and payer/receiver convention? |
| Liquidation | Is liquidation partial or full, what fees apply, and how are gaps or illiquid markets handled? |
| Loss sharing | Does the venue describe an insurance fund, auto-deleveraging or another loss-allocation mechanism? |
| Execution quality | What are trading fees, liquidity, spread and likely slippage at your position size? |
| Account controls | How are custody, authentication, withdrawals, subaccounts and emergency controls protected? |
| Customer recourse | Which entity is your counterparty, and what complaint or dispute process applies? |
Common failure modes and the corrective action
“The chart never touched my liquidation price.”
Check the mark-price history, index constituents and liquidation timestamp. Then review funding, fees, maintenance-tier changes and cross-margin activity. The last trade on a chart is not necessarily the trigger used by the risk engine.
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“I used isolated margin, so my loss was capped exactly at the deposit.”
Isolated mode limits the assigned collateral under the venue’s rules, but fees, funding, gaps and liquidation charges can affect the final amount. Confirm the venue’s definition and keep a separate cash reserve for obligations outside the position.
“I added collateral and the position looked safe again.”
The ratio may improve immediately, but the trade now risks more capital. Re-evaluate the original loss thesis and close if the pre-set maximum loss has been reached; do not convert a temporary margin repair into an unlimited averaging strategy.
“A funding credit means holding longer is free.”
Funding changes over time and can reverse. Compare the expected credit with price risk, fees, spread and the possibility of a later debit. A credit does not protect against liquidation from an adverse mark-price move.
“The interface offered 100x, so my account can safely use it.”
The maximum displayed leverage is a technical ceiling, not a risk recommendation. Recalculate notional from your loss limit and choose the lowest setting that supports that deliberately sized position.
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- Jurisdiction and customer eligibility verified.
- Contract multiplier, index, mark price and funding schedule recorded.
- Initial and maintenance tiers checked at the intended notional.
- Maximum cash loss written down, including fees, funding and slippage.
- Lowest suitable leverage selected after position sizing.
- Isolated or cross mode chosen with its collateral behavior understood.
- Stop trigger and reduce-only behavior confirmed.
- Liquidation estimate has a wide, volatility-aware buffer from the planned exit.
- Free collateral remains after reserved margin and a funding allowance.
- Alerts set for mark price, margin ratio, funding and venue notices.
- Plan states exactly when to reduce, close or stop trading for the day.
Bottom line for safer perpetual-futures trading
Perpetual futures can provide efficient exposure, but “safe leverage” is not a fixed multiplier. The defensible method is to limit the dollar loss first, size the notional second, select low leverage third, and then preserve a large buffer from the venue’s mark-price liquidation threshold. Understand initial versus maintenance margin, choose isolated or cross collateral intentionally, budget for funding and fees, and act before forced liquidation. Because legal treatment, risk tiers and contract mechanics differ, verify the current venue terms every time you trade a new contract or notice a specification change.
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