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What Are Perpetual Futures? How Perps Trading Works in DeFi Without Expiry Dates

8 min read
What Are Perpetual Futures? How Perps Trading Works in DeFi Without Expiry DatesAdvanced

You've seen the screenshots. 10x, 25x, 50x leverage. Traders posting positions worth multiples of their starting capital.

What you see less often are the liquidation notices. Those appear just as frequently, sometimes in the same portfolio, a few hours later.

Quick answer: Perpetual futures, or perps, are derivative contracts that let you speculate on an asset's price direction with leverage, and no expiry date. You don't own the asset. You hold a contract that profits or loses based on price movement. The position stays open until you close it or until your collateral is consumed by losses and the platform liquidates you automatically.

What Are Perpetual Futures?

A perpetual future is a contract whose value tracks an underlying asset, like SOL or BTC, without you ever owning that asset.

Unlike traditional futures contracts, which expire on a set date forcing settlement, perpetuals never expire. You open a position, hold it as long as you can maintain sufficient collateral, and close it when you choose, or when liquidation closes it for you.

The price of the perpetual contract is kept close to the underlying spot price through a mechanism called the funding rate, which we'll cover in detail.

The Five Components of Every Perps Position

1. Collateral The capital you deposit to open and maintain a position. This is what's at risk, not the full notional value of the position. On most DeFi perps platforms, collateral is USDC or the native token.

2. Notional Value The total position size you control. With $1,000 collateral at 10x leverage, your notional position is $10,000. Price movements are calculated against the notional.

3. Leverage The multiplier applied to your collateral. Leverage amplifies gains and losses equally. At 10x leverage, a 5% price move in your favor doubles your collateral. A 5% move against you halves it. A 10% move against you wipes it out.

4. Liquidation Price The price at which your position is closed automatically to prevent losses from exceeding your collateral. In practice, most platforms liquidate before collateral is fully consumed, holding back a maintenance margin as a buffer.

Roughly, here's how leverage relates to the price move that puts you at serious liquidation risk:

● 2x leverage: around a 50% move against you
● 5x leverage: around a 20% move against you
● 10x leverage: around a 10% move against you
● 25x leverage: around a 4% move against you
● 50x leverage: around a 2% move against you

These figures are simplified estimates based on leverage alone. Actual liquidation thresholds vary by platform and depend on each platform's specific maintenance margin requirements, so treat this table as a general guide, not a precise calculator. In crypto markets, where 5 to 10% daily moves are routine, high leverage leaves little room for normal market volatility.

5. Funding Rate The mechanism that keeps perps prices anchored to spot prices. Because perps never expire, there's no natural convergence to spot price at settlement. Funding rates solve this: periodically (every few hours), one side pays the other.

Long vs Short: The Two Directions

When perps price is above spot, longs pay shorts. The market is overheated on the long side.

When perps price is below spot, shorts pay longs. The market is overheated on the short side.

The payment incentivizes participants to trade against the imbalance, pulling the perps price back toward spot. For holders of leveraged positions, funding rates accumulate silently, eroding returns on the wrong side of a persistent imbalance.

Long: you believe the price will rise. You profit when it does. You lose when it falls. If the price falls enough to consume your collateral, you're liquidated.

Short: you believe the price will fall. You profit when it does. You lose when it rises. If the price rises enough to consume your collateral, you're liquidated.

Shorting is what perps offer that spot trading can't: the ability to profit from falling prices. In bear markets, a short position can generate returns when every spot holder is losing. It can also be used to hedge a spot position; holding SOL while shorting SOL perps reduces your net price exposure.

On-Chain Perps vs Centralized Perps

Custody of collateral: Centralized exchanges hold it. On-chain, it stays in your wallet until a position is open.

Transparency: Centralized platforms are a black box; you trust the exchange. On-chain, all positions are visible.

Counterparty risk: Centralized platforms carry exchange solvency risk. On-chain platforms carry smart contract risk.

KYC required: Yes on centralized platforms. No on-chain; wallet only.

Geographic restrictions: Often present on centralized platforms, with many countries blocked. None on-chain; any wallet can participate.

Settlement: Centralized platforms settle through an exchange database. On-chain settlement happens on the blockchain as a permanent record.

Liquidation process: Centralized platforms control liquidation themselves. On-chain, it's handled automatically by smart contracts.

On-chain perps remove counterparty risk from the equation: your collateral is secured by smart contracts rather than an exchange's promise. The tradeoffs: smart contract risk replaces counterparty risk, and on-chain settlement has gas costs and latency that centralized platforms don't.

The Risks: Stated Plainly

Perpetual futures are the highest-risk instrument in DeFi. The risks compound.

Liquidation is automatic and final. When collateral runs out, the platform closes the position immediately. No warning call. No time to add funds. The position is gone, and your collateral with it.

Funding rates accumulate silently. A position on the wrong side of a persistent funding rate environment loses capital continuously, independent of price movement. You can be directionally correct and still lose money to funding.

Volatility is the liquidation engine. Crypto's normal daily volatility is the mechanism that liquidates leveraged positions. A 10% overnight move is unremarkable in crypto. At 10x leverage, it can eliminate the position.

Cascade liquidations amplify crashes. When prices fall rapidly, liquidated longs add sell pressure. More longs liquidate. More sell pressure. The cascade accelerates the move, which is why crypto crashes are often faster and deeper than initial momentum suggests.

Frequently Asked Questions

Can I lose more than I deposit on perpetual futures?

On most modern DeFi perps platforms, including isolated margin accounts, your maximum loss is your deposited collateral. However, cross-margin accounts pool all your capital as collateral for all positions; a loss in one position can draw from your full balance. Always verify which margin mode you're using.

What is a funding rate in plain terms?

A periodic payment between longs and shorts that keeps the perps price close to the spot price. When more traders are long than short, longs pay shorts. When more are short, shorts pay longs. The rate adjusts automatically based on the imbalance. Think of it as the cost of holding an imbalanced position over time.

Is shorting crypto the same as shorting stocks?

Mechanically similar: you profit from price declines. The differences are magnitude and speed. Crypto assets can fall 50 to 90% in weeks; the same move in equities might take years. Short squeeze risk, sharp upward moves forcing short positions to close, is also more severe in crypto due to lower overall liquidity.

What's the difference between isolated and cross margin?

Isolated margin: only the collateral assigned to a specific position is at risk; losses are capped at the allocated amount.

Cross margin: all funds in your account serve as collateral, giving more flexibility to avoid liquidation, but your entire balance is at risk if multiple positions move against you simultaneously.

Should a beginner trade perpetual futures?

This is a personal decision that depends on your risk tolerance and experience, and nothing here is financial advice. Many experienced traders recommend paper trading (simulated trading with no real capital) on a testnet or simulation tool first, since understanding the mechanics through an article is different from managing a live leveraged position during market volatility. A common approach is to start with spot trading, build a track record, then consider perps with the smallest available leverage and position sizes.

Conclusion

Perpetual futures give you leverage, the ability to short, and exposure to assets without custody. Those capabilities are genuinely useful: for hedging, for directional conviction trades, and for generating returns in both bull and bear markets.

They're also one of the fastest ways to lose capital in DeFi when used without understanding what liquidation means at 10x, 25x, or 50x leverage.

The framework from Day 29's risk management article applies here more than anywhere else in the series. Size your collateral as if it can go to zero, because at high leverage, a single normal market move can make that true.

Know your liquidation price before you enter. Set a stop-loss. Treat your first positions as education, not investment.

This article is for educational purposes only and is not financial advice.

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