Perpetual Futures Explained: A Beginner's Guide to Perps

Perpetual futures — "perps" — are the most traded instrument in all of crypto, moving hundreds of billions of dollars every month. If you've only ever bought and held coins, this guide explains exactly what you're looking at the first time you open a perp DEX, with no jargon left undefined.

What Is a Perpetual Contract?

A traditional futures contract is an agreement to buy or sell an asset at a set date. A perpetual contract removes the date: the position stays open as long as you want, tracking the price of the underlying asset — BTC, ETH, gold, a stock — without you ever owning it.

You post collateral (usually USDC), pick a direction, and your profit or loss mirrors the asset's price moves:

• Long — you profit when the price rises
• Short — you profit when the price falls

Because it's synthetic, you can short as easily as you long — something spot buying can't do.

Funding Rates: The Glue That Tracks Price

With no expiry, what stops the perp price from drifting away from the real ("spot") price? The funding rate — a small periodic payment exchanged directly between longs and shorts:

• Perp trades above spot → longs pay shorts → shorting becomes more attractive → price pulled back down
• Perp trades below spot → shorts pay longs → longing becomes more attractive → price pulled back up

Funding is typically paid every 1–8 hours depending on the exchange. In sustained bull manias, funding can get expensive for longs — which is precisely the inefficiency that funding rate arbitrage harvests.

Leverage and Margin

Leverage lets you control a position larger than your collateral. With $1,000 margin at 10x you control a $10,000 position — every 1% move in the asset is a 10% move in your equity, both directions.

Rule of thumb: at leverage N, an adverse move of roughly 100/N percent wipes your position. 10x → ~10% away. 50x → ~2% away. 1001x → ~0.1% away. This is why max leverage is a marketing number, not a suggestion.

Two margin modes matter:

• Isolated margin — each position risks only the collateral assigned to it. Best for beginners.
• Cross margin — your whole account balance backs all positions. More capital-efficient, but one bad trade can drain everything.

Liquidation

If the price moves against you far enough that your margin can no longer cover the potential loss, the exchange force-closes ("liquidates") your position, and you lose the margin backing it. Liquidation is not a punishment — it's the mechanism that keeps the system solvent without anyone owing debt. Your defenses:

1. Size small — risk 1–2% of your account per trade, not 50%
2. Use stop-losses — exit on your terms before the liquidation engine does it on worse terms
3. Respect volatility — memecoins like DOGE need far lower leverage than BTC

Why Trade Perps on a DEX?

Everything above works identically on centralized and decentralized exchanges. The difference is the wrapper:

The three venues we recommend each optimize a different variable: Hyperliquid for liquidity, Aster for asset breadth and privacy, Lighter for zero fees. See the full comparison.

Keep Reading

• No-KYC perpetual trading — risks, fees and safer first setup
• Best perp DEX for beginners — Hyperliquid vs Aster
• Funding rate arbitrage — earn the perp premium, delta-neutral
• Basis trade on perp DEXs — cash-and-carry vs the funding gap
• Grid trading on perp DEXs — range inventory, funding and liquidation
• Leverage risk on perp DEXs — size the distance, not the multiple
• How to trade gold & US stocks 24/7 without a broker
• Hyperliquid vs Aster vs Lighter — which perp DEX wins?