What Are Perpetual Futures: Crypto Most Popular Derivative
Perpetual futures are crypto futures with no expiry date, using a funding rate to track the spot price. We explain the mechanism, leverage, funding rate, and liquidation risk.
The futures that "never expire"
On crypto exchanges, the most-traded derivative is not traditional futures but perpetual futures (or "perps"). The special feature: it has no expiry date — you hold the position as long as you want. Understanding it gives you the dominant trading tool of the crypto market (and its risks too).
Difference from traditional futures
- Traditional futures: have a fixed expiry, and must settle at maturity (like VN30 index futures).
- Perpetual futures: no expiry — held indefinitely. To keep the perp price from drifting too far from the real (spot) price, the exchange uses a mechanism called the funding rate.
How the funding rate keeps the price tracking spot
Since there is no expiry to "pull" the price back to spot, perps use a funding fee paid periodically (usually every few hours) between the long and short sides:
- Perp price above spot (many longs): the longs pay a fee to the shorts, encouraging shorts and pulling the price down toward spot.
- Perp price below spot (many shorts): the shorts pay a fee to the longs, pulling the price up.
This is the funding rate — both a price-balancing mechanism and a kind of cost/income for holding a position overnight.
Leverage and two-way
- Long/short: profit both when the price rises (long) and falls (short) — unlike buying spot, which only profits on a rise.
- High leverage: perps allow large leverage (sometimes tens of times) — strongly magnifying both gains and losses.
The biggest risk: liquidation
High leverage comes with the risk of liquidation: when the price moves against your position far enough, your margin is no longer sufficient, so the exchange automatically closes the position and you lose your margin. See futures liquidation.
- The higher the leverage, the smaller the adverse move needed to be liquidated.
- Crypto strong volatility makes liquidations happen very fast — many people "blow up" their account in minutes.
- Related to the harsh math of maximum drawdown.
Perps are not for accumulation
Perpetual futures are a short-term trading and hedging tool, requiring strong risk discipline and experience. They are not suitable for long-term accumulation — funding fees, leverage, and liquidation risk make "holding" a perp completely different from owning the real coin.
Conclusion
Perpetual futures are crypto futures with no expiry date, using a funding fee to keep the price tracking spot, allowing long/short with high leverage. They are crypto most popular derivative, but high leverage comes with fast liquidation risk. They are a tool for experienced traders, not for long-term accumulation.
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