· BuiltOnBulk · Guides · 6 min read
What Are Perpetual Futures? The Complete Guide for 2026
Perpetual futures are derivatives contracts with no expiry date. Instead of settling at a fixed date, they use a funding rate mechanism to keep price anchored to spot. They are the dominant trading instrument in crypto, with hundreds of billions in daily notional volume.
Perpetual futures are the dominant trading instrument in crypto. They account for the majority of daily volume across all crypto exchanges — more than spot, more than options, more than standard futures. Understanding how they work is prerequisite knowledge for trading any decentralized exchange, including BULK Exchange.
The Core Mechanic: No Expiry, Funding Rate Instead
Traditional futures have a settlement date. On that date, the contract expires and settles at the underlying asset’s price. Traders who want continued exposure must roll to the next contract.
Perpetual futures remove the expiry. They trade indefinitely. In place of settlement, they use a funding rate — a periodic transfer between long and short holders that pulls the perpetual price toward the spot price.
How the funding mechanism works:
If the perpetual trades at a premium to spot (perp price > spot price):
- Longs pay shorts
- This makes holding longs more expensive
- Traders arbitrage by buying spot and shorting the perp, driving the perp price down toward spot
If the perpetual trades at a discount to spot (perp price < spot price):
- Shorts pay longs
- This makes holding shorts more expensive
- Traders arbitrage by selling spot and going long the perp, driving the perp price up toward spot
The funding rate eliminates the need for contract expiry by creating continuous price correction incentives.
Key Terms
Margin
The capital deposited as collateral to open a position. Margin is not the size of your position — it is your collateral against potential losses.
Leverage
The multiplier applied to your margin to determine position size. At 10x leverage, $1,000 margin controls a $10,000 notional position.
- Initial margin: The minimum margin required to open a position at a given leverage
- Maintenance margin: The minimum margin required to keep a position open
- When margin falls below maintenance margin, liquidation is triggered
Mark Price
The reference price for calculating PnL and liquidations. Derived from the spot index price plus a funding basis adjustment. Not identical to the last-traded price on the exchange.
Why mark price matters: If a position would be liquidated based on last-traded price but not mark price, many exchanges use mark price to avoid liquidating you on a momentary wick. BULK Exchange uses mark price for liquidation calculations.
Funding Rate
The periodic payment between longs and shorts. Expressed as a percentage of position value per period (e.g., 0.01% per 8 hours = 0.03% per day = ~11% annualized). Positive funding means longs pay shorts; negative means shorts pay longs.
Realized vs Unrealized PnL
- Unrealized PnL: Profit or loss on open positions, calculated using mark price
- Realized PnL: Profit or loss locked in by closing a position
On BULK Exchange’s leaderboard, only realized PnL counts. An open position showing 500% gain contributes zero until it is closed.
Long and Short
- Long: You profit if the price rises. Analogous to buying the asset.
- Short: You profit if the price falls. Only possible with derivatives — you cannot short in spot markets without borrowing.
How a Trade Works: Step by Step
Example: You deposit $1,000 USDC and open a BTC-USD long at 10x leverage.
- Your $1,000 is posted as margin
- You control a $10,000 notional BTC position
- BTC rises 5%: your position gains $500 (50% return on margin)
- BTC falls 10%: your position loses $1,000 (100% loss — liquidation)
The liquidation price is the price at which your margin equals the maintenance margin threshold. Below that price, the exchange closes your position.
Managing liquidation risk:
- Use lower leverage
- Add more margin to the position (reduces leverage ratio)
- Set a stop-loss order above the liquidation price
- Monitor mark price, not just last-traded price
Funding Rates in Practice
Funding rates vary widely by market conditions:
| Market Condition | Typical Funding | What It Means |
|---|---|---|
| Strong bull market | +0.01% to +0.1% per 8h | Longs pay shorts; holding longs costs money |
| Sideways market | −0.01% to +0.01% per 8h | Near-zero cost either direction |
| Strong bear market | −0.01% to −0.1% per 8h | Shorts pay longs; holding shorts costs money |
| Extreme market | Up to ±1% per 8h | Significant daily drag on position holders |
Annualized funding cost at different rates:
- 0.01% per 8h = ~11% annualized
- 0.05% per 8h = ~55% annualized
- 0.1% per 8h = ~110% annualized
At high funding rates, the cost of holding a position exceeds most yield strategies. Position holders who ignore funding can have profitable trades wiped out by accumulated funding payments.
On BULK Exchange, funding is peer-to-peer. The exchange takes zero cut.
Types of Margin
Isolated Margin
Each position is assigned a fixed amount of margin. If the position is liquidated, you lose only that isolated margin — other positions and the rest of your account balance are unaffected.
Best for: speculative directional bets where you want defined maximum loss.
Cross Margin
Your entire account balance is available as margin for all positions. Positions can offset each other’s margin requirements.
Best for: traders who want to avoid unnecessary liquidations and can manage total account risk.
Portfolio Margin (BULK Exchange specific)
Goes further than cross margin by accounting for correlation between positions. A long BTC and short ETH position require less combined margin than two unrelated positions, because they are correlated assets.
BULK Exchange documents up to 70% margin efficiency on hedged portfolios using its HMM-based portfolio margin model. This is the most capital-efficient margin available on any Solana perp DEX.
Perpetual Futures vs Other Instruments
| Feature | Spot | Perpetual Futures | Standard Futures |
|---|---|---|---|
| Expiry | None | None | Fixed date |
| Leverage | Usually no | Yes (up to 100x on BULK) | Yes |
| Short selling | No | Yes | Yes |
| Funding rate | No | Yes (periodic) | No (basis in price) |
| Asset custody | You hold it | No custody | No custody |
| Liquidation risk | No | Yes | Yes |
| Settlement | Immediate | Never (until you close) | At expiry |
Where to Trade Perpetual Futures on Solana
BULK Exchange — 5–20ms matching latency, CLOB model, portfolio margin, leaderless consensus. Expected mainnet June 2026. Full guide →
Jupiter Perps — Oracle AMM model, established liquidity, simpler execution. Higher effective fees.
Drift Protocol — Native Solana program, integrated with Solana DeFi. Constrained by Solana’s ~400ms block time.
Frequently Asked Questions
Are perpetual futures safe? Perpetual futures carry significant risk. Leverage amplifies losses as well as gains. Liquidation can result in total loss of margin. Funding rates create ongoing costs for position holders. They are appropriate only for traders who understand the mechanics and actively manage risk.
What is the most liquid perpetual futures market? BTC-USD is consistently the highest-volume perpetual futures market globally, traded on Binance, Bybit, OKX, and DEXes like Hyperliquid and BULK Exchange.
Do you pay taxes on perpetual futures? Tax treatment of crypto derivatives varies by jurisdiction. In most countries, perpetual futures are treated as derivatives for tax purposes, with gains and losses recognized at close. Consult a tax professional familiar with crypto derivatives in your jurisdiction.
Related Reading
- BULK Exchange: The Solana Perp DEX
- How Funding Rates Work on BULK Exchange
- How Liquidations Work on BULK Exchange
- Portfolio Margin vs Isolated Margin
- Funding Rate Arbitrage Guide
Last updated May 28, 2026.
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