Perpetual Futures

02 September 2026

A perpetual futures contract is a derivative instrument that tracks the price of an underlying asset - typically a cryptocurrency like Bitcoin or Ether - without ever expiring. Unlike traditional futures that settle on a fixed calendar date, a perpetual swap can be held open indefinitely. The mechanism that keeps its price tethered to the spot market is the funding rate: periodic payments between longs and shorts that adjust based on the premium or discount between the perpetual contract price and the underlying index price. This page maps the full scope of perpetual futures: how they work, what they cost, the tools used to trade and analyze them, the errors you will encounter, the decisions you must make, and the risks that can destroy an account in seconds.

If you are entirely new to the subject, start with the foundational question: What Is a Perpetual Swap Contract and How Does the Funding Mechanism Work? That spoke page explains the contract structure that makes perps different from every other futures product.

Core mechanics: how perpetual futures stay anchored

The defining feature of a perpetual swap is the funding rate. At regular intervals - typically every eight hours on centralized exchanges like Binance Futures and Bybit, though some platforms use one-hour or four-hour windows - longs pay shorts or shorts pay longs. The rate is calculated from the difference between the contract's mark price and the underlying index price. When the perpetual trades at a sustained premium to spot, longs pay shorts to encourage selling that pulls the price back down. When it trades at a discount, shorts pay longs.

This mechanism is not a fee charged by the exchange. It is a peer-to-peer transfer. The How Funding Rate Premium and Discount Are Calculated on Perps spoke page walks through the exact formula exchanges use, including the premium index and the clamping logic that caps the rate at a maximum (often 0.75% per funding interval on Binance, though this varies by pair and market conditions).

The funding rate is applied to the notional value of your position, not your margin. If you hold a $10,000 position using 10x leverage with $1,000 in margin, you pay funding on the full $10,000. This means leverage multiplies your funding cost just as it multiplies your PnL - a point that many new traders miss.

Mark price vs last traded price

You open a perpetual futures position. The chart shows the last traded price at $30,000. Your liquidation price, according to the exchange interface, is $29,500. Then the mark price drops to $29,500 even though the last traded price never went below $29,800. Your position is liquidated. The chart never showed the price that killed it.

This happens because exchanges use a mark price - not the last traded price - to determine liquidations. The mark price is derived from the spot index, smoothed by a time-weighted average price (TWAP) mechanism on some platforms, and designed to resist manipulation from a single large trade on the orderbook. The Mark Price vs Last Traded Price in Perpetual Futures Explained page answers why your position can liquidate at a price the chart never shows, and how to read the mark price on your exchange interface.

The basis spread and open interest

The gap between the perpetual price and the spot price is called the basis spread. A positive basis (perp above spot) indicates longs are paying a premium to hold their positions. A negative basis (perp below spot) means shorts are paying. The size of the basis tells you how crowded one side of the trade has become.

Open interest - the total notional value of all outstanding perpetual contracts - shows how much capital is committed to the market. Rising open interest with a widening basis suggests momentum in the direction of the basis. Falling open interest with a shrinking basis suggests positions are closing and the move is losing conviction. The Basis Spread in Perpetual Futures Spot vs Perp Price Divergence page explains how to interpret this data, and Open Interest and Long Short Ratio for Perpetual Futures Analysis shows you how to use the long-short ratio to spot crowded trades that are vulnerable to squeezes.

Margin, leverage, and liquidation

Every perpetual futures position requires margin - collateral that secures the trade against adverse price movement. The amount of margin you must post is determined by your chosen leverage and the size of the position. At 10x leverage on a $10,000 notional position, you need $1,000 in margin. At 100x, you need $100.

Initial margin vs maintenance margin

When you open a position, the exchange requires initial margin. That is the minimum collateral needed to enter the trade. Once the position is open, a lower threshold applies: maintenance margin. This is the minimum collateral required to keep the position open. If your margin ratio falls below the maintenance level, the exchange issues a warning and eventually liquidates the position.

The Maintenance Margin vs Initial Margin Threshold in Perpetual Futures spoke page explains the exact percentages for different leverage tiers and position sizes. On Binance, for example, a 100x BTCUSDT perpetual position has an initial margin rate of 1% and a maintenance margin rate of 0.5%. That 0.5% buffer is thin. A 0.5% move against you at 100x leverage wipes out half your margin.

Isolated margin vs cross margin

You have two choices for how margin is allocated across your positions.

Isolated margin locks a specific amount of collateral to a single position. If that position gets liquidated, only the isolated margin is lost. The rest of your account balance is untouched. The Isolated Margin Mechanics for Perpetual Futures Position Risk Management page covers exactly how this works and when it makes sense to use it.

Cross margin shares your entire account balance as collateral across all open positions. A losing position can draw margin from your other positions to stay open longer. But if the loss continues, it can liquidate your entire portfolio - including positions that were profitable. The Cross Margin Mechanics Sharing Collateral Across Perpetual Futures Positions page explains this contagion risk in detail, along with the error message "Cross margin transfer blocked by open orders" that traps traders who try to move funds out of a failing cross-margin account.

The decision between isolated and cross margin is one of the most consequential choices you make. It is covered on the Isolated Margin vs Cross Margin spoke page.

How leverage multiplies everything

Choosing a leverage ratio is not just about setting your liquidation price. It also multiplies your funding costs, your trading fees, and your exposure to slippage. The How to Choose a Fixed Leverage Ratio for Perpetual Futures Trading page walks through the tradeoffs at each tier - 1x, 2x, 5x, 10x, 20x, 50x, 100x, and 125x - and explains why higher leverage does not just mean a tighter liquidation price; it means every cost scales proportionally.

Partial vs full liquidation

When a position hits the liquidation price, the exchange does not necessarily close the entire position at once. Many exchanges use a stepwise liquidation engine that closes a percentage of the position - often 50% or 20% - to reduce the remaining position's leverage and keep it alive. This is called partial liquidation.

The Partial vs Full Liquidation Waterfall in Perpetual Futures Explained page details how different exchanges handle this. On Bybit, for example, a partial liquidation closes 50% of the position and returns the freed margin to the remaining position. On Binance, the liquidation engine uses a tiered system that can close a percentage based on the margin ratio breach severity.

Unrealized pnl and available margin

Your available margin changes even when you have not closed a trade. If your position moves against you, the unrealized loss reduces the margin available to open new positions or withdraw. The How Unrealized PnL Impacts Available Margin in Perpetual Futures page explains this dynamic and why your "available balance" can drop to zero while a trade is still open.

Bankruptcy Price and the Insurance Fund

When a position is liquidated, the exchange attempts to close it at the bankruptcy price - the price at which the position's margin reaches zero. If the actual fill price is worse than the bankruptcy price, the difference is a loss that must be absorbed.

Exchanges maintain an insurance fund (sometimes called a clearing fund) to cover these losses. The fund is built from liquidation penalties - a fee charged to the liquidated trader, typically 0.5% to 1% of the position value. The How the Insurance Fund and Clearing Backstop Work in Perpetual Futures page explains what the insurance fund actually covers and what happens when it runs dry: socialized loss clawbacks, where profitable traders are charged to cover the deficit.

Auto-Deleveraging (ADL)

If the insurance fund is exhausted, the exchange activates auto-deleveraging. The ADL engine selects profitable positions and forcibly closes them to offset the loss from the bankrupt position. Selection is based on a priority ranking: positions with higher leverage and higher profitability are targeted first.

This is why a profitable position can be taken over by the exchange. The Auto Deleveraging ADL Queue and Priority Ranking in Perpetual Futures page explains the ranking system and whether you can opt out (most exchanges do not offer an opt-out for ADL; it is a mandatory risk mechanism).

Costs and Fees

Perpetual futures trading involves several layers of cost beyond the obvious trading fees.

Maker and taker fees

Every trade on a centralized perpetual exchange incurs a maker fee (for adding liquidity to the orderbook) or a taker fee (for removing liquidity). These fees range from approximately 0.01% maker / 0.06% taker on Binance to 0.02% maker / 0.07% taker on Bybit for standard users. Fee discounts are available through exchange token staking - holding BNB on Binance reduces fees by up to 25%, and holding BYD on Bybit reduces taker fees.

On decentralized exchanges like dYdX, maker fees can be negative (the exchange pays you to provide liquidity) while taker fees are around 0.05%. Hyperliquid uses a flat execution fee model with no maker rebate. The CEX vs DEX Perpetual Futures Custody Fees and Liquidity Compared page breaks down the fee structures and custody tradeoffs between centralized and decentralized platforms.

Funding Rate as a Cost

Funding rate is not a fee paid to the exchange, but it is a cost you must budget for. On a long position with a positive funding rate of 0.01% per eight-hour interval, you pay 0.03% of your notional position per day. On a $100,000 position at 10x leverage, that is $30 per day in funding. Over a month of holding, that is $900 - nearly 1% of your notional value.

The Funding Rate Timing Open Perpetual Futures Before or After Settlement page addresses whether you can avoid funding by closing before the snapshot. In theory, yes. In practice, the price often moves against you in anticipation of the funding payment, and the slippage from closing and reopening can exceed the funding cost you were trying to avoid.

Liquidation penalty and slippage

When your position is liquidated, the exchange charges a liquidation fee. On Binance, this is typically 0.5% to 1% of the position value, deducted from your remaining margin. On top of that, the liquidation engine may fill your position at a price worse than the bankruptcy price due to slippage. The Stop Loss vs Liquidation Price Why Stop Orders Fail on Perpetual Futures page explains why a stop-loss order can fail to execute during a fast move, leaving you with a liquidation at a worse price than your stop would have filled.

Tools and Platforms

The perpetual futures ecosystem spans centralized exchanges, decentralized platforms, and analytics tools.

Centralized Exchanges

Binance Futures, Bybit, and OKX are the three largest centralized perpetual exchanges by open interest. Each offers the full suite of features: isolated and cross margin, multiple leverage tiers, funding rate dashboards, and insurance funds. Binance has the deepest liquidity across the most pairs. Bybit is known for a transparent liquidation engine and a user-friendly interface. OKX offers competitive fee tiers and a strong selection of altcoin perps.

Decentralized Exchanges

dYdX runs on its own app-chain (v4) and offers a traditional orderbook experience with self-custody. Hyperliquid is a purpose-built L1 for perpetuals with a flat execution fee model and no maker rebate. GMX uses a GLP pool model on Arbitrum and Avalanche where liquidity providers earn fees and traders trade against the pool. Gains Network offers synthetic perps on Polygon and Arbitrum through its gTrade platform. Jupiter Perps and Drift Protocol bring perps to Solana, each with different pool structures.

The CEX vs DEX Perpetual Futures Custody Fees and Liquidity Compared page covers the tradeoffs: centralized exchanges offer deeper liquidity and faster execution but require KYC and custody your funds; decentralized exchanges offer self-custody and no KYC but introduce smart contract risk, oracle risk, and pool insolvency risk.

Analytics Tools

Coinglass (formerly Bybt) provides liquidation heatmaps, open interest charts, funding rate data, and long-short ratios across exchanges. Velo Data offers institutional-grade derivatives analytics. Laevitas specializes in funding rate dashboards and basis analytics. TradingView supports funding rate overlays on price charts. DexScreener tracks on-chain perp pairs. Parsec Finance is an on-chain derivatives explorer for DeFi perps.

Risks and Misconceptions

Cascading Liquidations

A long squeeze occurs when a price drop triggers a wave of long liquidations. Each liquidation sells the underlying asset, pushing the price lower and triggering more liquidations. A short squeeze is the mirror image: a price spike forces shorts to cover, driving the price higher and liquidating more shorts.

These cascades can happen in seconds. The liquidation engine can become overloaded during extreme volatility, causing delayed fills and worse prices for liquidated positions. The *Liquidation engine order flow (limit order vs market order