---
title: "Perpetual Swap: How Crypto's Most Liquid Derivative Works"
description: "A perpetual swap lets you trade crypto with leverage without an expiry date. Learn how funding rates, margin requirements, and risk controls shape every position."
url: "https://evedex.com/en/blog/perpetual-swap/"
lang: "en"
author: "Vladimir Shepelev"
date_published: "2026-04-13"
date_modified: "2026-09-15"
---

# Perpetual Swap: How Crypto's Most Liquid Derivative Works

Vladimir Shepelev · April 13, 2026

Last Updated: September 15, 2026

A **[perpetual swap](https://evedex.com/en/perp-dex/)** is a derivative contract that tracks the price of a cryptocurrency without an expiration date. Unlike traditional futures, which settle on a fixed date, perpetual swaps let you hold leveraged long or short positions for as long as you want — provided you maintain sufficient **margin**. The contract stays anchored to the spot price through a **[funding rate](https://evedex.com/en/blog/what-is-funding-rate/)** mechanism: every eight hours, longs pay shorts (or vice versa) based on the difference between the perpetual price and the underlying index. This keeps the contract price close to spot even when leverage demand skews heavily to one side. Perpetual swaps have become the most liquid instrument in crypto, dwarfing spot volume on major exchanges and offering traders a way to amplify gains — or losses — with minimal capital, which is [how futures without expiry work](https://evedex.com/en/blog/perpetual-swaps-crypto/) in practice. Understanding **leverage**, **[liquidation](https://evedex.com/en/what-is-liquidation/)**, and **position sizing** is critical before opening your first trade. By the end of this guide, you'll know how funding works, what drives liquidation, and how to **manage risk on leveraged positions** without burning through your account in a single spike. You'll also see why perpetual swaps suit active traders more than casual holders, and when **[spot trading](https://evedex.com/en/what-is-spot-trading-in-crypto/)** is the safer path.

## Key Features Compared

| Feature | Perpetual Swap | Futures | Spot |
| - | - | - | - |
| Expiry | None — open indefinitely until you close or are liquidated | Fixed settlement date (weekly, monthly, quarterly) | None — you own the asset |
| Funding | Periodic (usually every 8 hours) based on perpetual vs spot premium | No funding — premium or discount baked into futures price | No funding — you hold the token directly |
| Leverage | Up to 125× on some platforms, typical retail use 5–20× | Varies by contract, often lower than perpetual swaps | 1× only — no borrowing unless using margin spot |

## How Funding Rates Keep Price in Line

Every few hours, the exchange calculates the difference between the [perpetual swap](https://evedex.com/en/perp-dex/) price and a weighted spot index. If the swap trades above spot, the [funding rate](https://evedex.com/en/blog/what-is-funding-rate/) turns positive: longs pay shorts a small percentage of their position size. If the swap trades below spot, funding flips negative and shorts pay longs. This creates an economic incentive to arbitrage the gap — traders open the cheaper side and pocket the funding, which pulls the perpetual price back toward spot. Funding compounds over time. A position held for weeks in a trending market can rack up meaningful payments in either direction, especially at high leverage. Some traders open positions purely to collect funding in sideways markets, a strategy that works until volatility spikes. The [CME's Bitcoin futures micro-contract](https://www.cmegroup.com/markets/cryptocurrencies/bitcoin/micro-bitcoin.html) uses a different settlement model, but the funding-rate mechanism is unique to perpetual swaps and has become the standard across centralized crypto exchanges. You can check the current funding rate on any platform's contract page before entering a trade — it's displayed as an annualized percentage and updates every cycle.

![funding rate chart](https://evedex.com/images/images4articles/216.webp)

## Six Factors That Determine Your Risk

Before you size a position, understand what moves your liquidation price and how fast margin evaporates in volatile conditions.

1. **Leverage multiplier** The higher the multiple, the smaller the price move needed to wipe out your margin. At 10×, a 5% adverse move halves your account; at 50×, a 1% move does the same.
2. **Entry price and direction** Your liquidation price is calculated from your entry. Longs get liquidated below entry; shorts above. Even a brief wick can trigger liquidation if it touches your threshold.
3. **Maintenance margin requirement** Exchanges require you to hold a percentage of position value as collateral. If your balance falls below this level, the liquidation engine closes your position at market — often at a worse price than your calculated liquidation level during high volatility.
4. **Funding rate sign and size** Positive funding drains long positions slowly; negative funding drains shorts. A 0.1% rate every eight hours adds up to 10.95% annually, compounded against your margin.
5. **Mark price vs last price** Most platforms use a mark price (a smoothed index) to calculate unrealized PnL and liquidations, not the last traded price on the order book. This prevents price manipulation from triggering liquidations during thin-book spikes.
6. **Slippage and order type** Market orders during volatile periods can fill far from the displayed price, especially on lower-liquidity pairs. Limit orders avoid slippage but risk not filling if price gaps past your level.

Sizing your position to survive a 10–15% adverse move — even at lower leverage — gives you room to manage the trade instead of watching it vanish in seconds. Use a **position size calculator** to model liquidation scenarios before committing capital.

Most traders who blow up on perpetual swaps do so within their first few trades, not because they picked the wrong direction but because they used leverage they couldn't afford to hold through normal intraday swings. A 5× long can weather a 15% dip and still have margin left; a 25× long is liquidated after a 3% move. The difference between surviving and getting stopped out is often just one less click on the leverage slider. According to [research published by the Bank for International Settlements](https://www.bis.org/publ/qtrpdf/r_qt2112b.htm), retail leverage in [crypto derivatives](https://evedex.com/en/crypto-derivatives/) averages higher than in traditional forex or equity CFDs, and liquidation rates correlate directly with the leverage chosen at entry.

## Trade Perpetual Swaps on EVEDEX

EVEDEX, a [crypto exchange](https://evedex.com/en/), offers perpetual swap contracts on 52 pairs — BTC, [ETH](https://evedex.com/en/blog/eth/) and 37 other crypto assets, plus stocks, forex, commodities and pre-market contracts — with leverage up to 200× on BTC-USD, ETH-USD and SOL-USD for positions up to $50,000 notional and lower caps on other pairs. It runs cross margin only, and funding is computed every 8 hours per pair and settled hourly. The platform's liquidation engine uses the mark price rather than the last traded price, so a momentary wick does not trigger liquidation on its own; a margin call fires first at 80% margin utilisation, and a 5% liquidation fee applies at close. You can attach take-profit and stop-loss triggers when you place an order or add them to an open position, and size orders by quantity, value or margin. Fees are 0.015% maker and 0.045% taker. Perpetual futures carry a high risk of loss.

## FAQ

### What happens if I don't close a perpetual swap position?

Nothing — perpetual swaps have no expiry date. Your position stays open until you close it manually or until liquidation occurs if your margin falls below the maintenance threshold. You'll pay or receive funding every eight hours depending on whether you're long or short.

### How much leverage should beginners use on perpetual swaps?

Start with 2–5× leverage. Higher multiples magnify losses just as much as gains. Most retail traders who use 20× or more get liquidated within days because small price moves drain their margin quickly.

### Can I lose more than my initial margin on a perpetual swap?

In theory, yes — but most exchanges use auto-liquidation engines that close your position before your account balance goes negative. A few platforms offer negative-balance protection to cap losses at your deposited margin.

### Do I pay funding if I close my position within eight hours?

No. Funding is charged or credited only at the scheduled timestamp (usually every eight hours). If you enter and exit between two funding periods, you owe nothing.

### Why do perpetual swaps sometimes trade at a premium to spot?

When more traders want to go long, the funding rate climbs and the perpetual price rises above spot to encourage shorts. The opposite happens in bear markets: negative funding and a discount to spot to attract longs.