Quick answer
A perpetual swap (perp) is a derivative contract that tracks a cryptocurrency's price, allowing you to go long (bet price rises) or short (bet price falls) with leverage — and no expiry date. Unlike futures contracts, perps never expire. A funding rate mechanism keeps the perp price aligned with the spot price. Decentralised perp platforms (dYdX, GMX, Drift, Hyperliquid) enable leveraged crypto trading without a centralised exchange.
What Is a Perpetual Swap?
A perpetual swap (or perp) is a derivative contract that tracks the price of an underlying asset — typically a cryptocurrency — but never expires. Unlike a futures contract (which expires on a fixed date and settles), you can hold a perp position indefinitely.
You can go long (betting the price will rise) or short (betting the price will fall), and use leverage to amplify your position. With 10x leverage, you control $10,000 of ETH exposure with only $1,000 in margin — amplifying both gains and losses proportionally.
Perps were invented by BitMEX in 2016 and have since become the dominant product in crypto derivatives by volume. In 2024–2026, DEX perp volume regularly exceeded $50B per month — comparable in scale to the largest centralised exchanges.
The Funding Rate: How Perps Stay Aligned with Spot Price
Because perps never expire, a mechanism is needed to keep the perp price aligned with the actual (spot) market price. That mechanism is the funding rate — a periodic payment between long and short traders.
If the perp price trades above spot (more longs than shorts — bullish sentiment dominates), long traders pay a funding fee to short traders. This incentivises new shorts and discourages new longs, pulling the perp price back toward spot.
If the perp price trades below spot, short traders pay longs — incentivising longs and discouraging shorts. Funding rates are settled every 8 hours on most centralised exchanges and hourly or continuously on most DEX perp platforms.
During strong bull markets, funding rates can reach 0.1–0.5% per 8 hours (equivalent to 45–225% annualised) for long positions. Always factor in the funding cost when planning to hold a leveraged position overnight or longer.
Liquidation: When Leverage Goes Wrong
When you open a leveraged position, you post margin — collateral covering potential losses. If the market moves against you and your losses approach your margin, the protocol automatically liquidates your position: it closes the trade and uses your margin to cover the loss.
At 10x leverage, a 10% adverse price move wipes out your entire margin. At 50x leverage, a 2% adverse move triggers liquidation. Higher leverage means a smaller buffer against normal market volatility — even routine 5–10% intraday swings can trigger liquidation at extreme leverage.
Liquidation on DEX perp platforms is handled by smart contracts and liquidation bots, not customer support. Most well-designed platforms use partial liquidation (reducing position size) before fully closing a position to minimise user losses.
- Never use maximum available leverage — 2–5x is appropriate for most traders; 10x+ should be reserved for experts who actively monitor positions
- Calculate your liquidation price before opening the position — all platforms display this clearly
- Set a mental stop-loss before entering any position — liquidation should not be your exit strategy
- Keep additional margin available to top up if the position moves against you
- Understand the platform's insurance fund — it covers liquidation shortfalls that exceed a trader's margin
Leading DEX Perpetual Swap Platforms
| Platform | Blockchain | Max Leverage | Model | Notable Feature |
|---|---|---|---|---|
| dYdX | dYdX Chain (Cosmos) | 20x | Order book | Largest DEX perp by volume; zero gas on own chain |
| Hyperliquid | Hyperliquid L1 | 50x | Centralised order book, on-chain settlement | Very high 2025–26 volume; sub-second finality |
| GMX | Arbitrum / Avalanche | 50x | Liquidity pool (GLP) | Zero price impact; GLP providers are counterparty to all trades |
| Drift Protocol | Solana | 50x | vAMM + order book | Solana-native; integrated spot, perps, and prediction markets |
| Gains Network (gTrade) | Polygon / Arbitrum | 150x (crypto) | Synthetic (DAI-backed) | Stocks, forex, and crypto pairs available; no underlying custody |
| Vertex Protocol | Arbitrum | 10x | Hybrid order book + AMM | Integrated spot, perps, and lending in one unified protocol |
dYdX vs GMX: The Two Dominant Models Compared
dYdX uses a traditional order-book model — buyers and sellers place limit and market orders that match against each other, exactly as on a centralised exchange. This means no price impact for large trades when the book is deep and tight spreads in liquid markets. dYdX migrated to its own Cosmos-based chain in late 2023 to achieve higher throughput and eliminate gas costs.
GMX uses a liquidity-pool model. A multi-asset pool (GLP) acts as the counterparty to all trades. Liquidity providers deposit a basket of assets (ETH, BTC, USDC) into GLP and earn all trading fees plus borrow fees from leveraged traders. GMX traders execute at oracle price with no slippage — but when traders collectively profit, GLP providers collectively lose.
The key trade-off: on dYdX, you trade against other humans in an order book. On GMX, you trade against the liquidity pool. Long-term GMX data shows the pool is profitable overall (traders collectively lose to the pool), making GLP provision a reasonable yield strategy — but individual periods of heavy trader wins can pressure GLP value significantly.
Frequently asked questions
Are crypto perps regulated in the UK?
Cryptocurrency derivatives including perpetual swaps are regulated financial instruments under UK law. The FCA requires firms offering crypto derivatives to UK retail consumers to be FCA-authorised. Most DEX perp platforms (dYdX, GMX, Drift) are not FCA-authorised. UK retail investors should check the FCA Financial Services Register before trading derivatives.
What is the difference between perps and futures?
Both are derivative contracts with leverage tracking an asset's price. Futures expire on a specific date and settle at that point. Perpetual swaps have no expiry date — they stay aligned with spot via the funding rate. Most retail crypto trading uses perps rather than futures because they are simpler to manage without expiry deadlines forcing position closure.
Can you lose more than your initial margin with perps?
On most well-designed platforms, your position is liquidated before losses exceed your initial margin — so you cannot lose more than you deposited. In extreme market conditions (flash crashes, oracle failures), the liquidation mechanism can fail. Insurance funds on platforms like GMX and dYdX are designed to cover these shortfalls.
What is open interest in perps?
Open interest is the total value of all outstanding long and short positions on a perp contract. High open interest heavily skewed to one side (e.g., 80% long) indicates a crowded trade and creates strong funding rate pressure against that side. Crowded trades can unwind violently when sentiment shifts, causing rapid price moves and cascading liquidations.
Is GMX safe?
GMX has undergone multiple security audits, has operated since 2021 without a major smart contract exploit, and has accumulated over $500M in TVL at its peak. However, GLP liquidity providers carry the risk of trader profits (if traders win, GLP loses value), and all DeFi protocols carry non-zero smart contract risk regardless of audit history.