What Is a Stock Perpetual Futures Contract? A Plain-English Guide

TL;DR: A stock perpetual futures contract (perp) is a leveraged derivative that tracks the underlying stock's price with no expiration date. A trader posts a small amount of cash as margin to control a larger position; price moves flow linearly into profit or loss. Periodic funding payments keep the contract aligned with the underlying stock price. Maximum loss is capped at the posted margin via automated liquidation.

At a glance: stock perpetual futures vs shares vs options

A stock perpetual futures contract is a leveraged contract that tracks a stock's price with no expiration date. A trader posts a small amount of cash as margin, picks a direction, and gains or loses based on how the stock moves. The leverage multiple sets how much exposure the margin controls.

Stock perps sit between buying shares and trading options. The payoff is simpler than an option, the leverage is higher than a standard brokerage margin account, and the contract never expires. The rest of this guide unpacks how the contract works and where it fits.

A Plain-English Definition

A perpetual futures contract, or perp, is an agreement to settle the change in a stock's price over time. The trader posts margin, applies a leverage multiple, and the position behaves as if a larger amount of stock had been bought or sold. Unlike a regular futures contract, a perp has no expiration date. The trade can be closed at any time.

The plain-English version: a perp is a leveraged bet on a stock that does not expire. Put up cash, control more exposure than the cash on its own would buy, close the trade whenever the idea plays out or breaks down.

How a Stock Perp Differs from Buying the Stock

Buying a share gives ownership in the company. A perp gives directional exposure to the share price without ownership. Three concrete differences matter.

Leverage. A share buy uses cash dollar-for-dollar. A perp uses margin: a fraction of the position size controls the full exposure. $1,000 of margin at 5x leverage on a perp behaves like $5,000 of stock exposure.

Direction. Buying shares wins when the stock goes up. A perp can go long (profit when the stock rises) or short (profit when the stock falls). Both directions are first-class on a perp; on a brokerage cash account, shorting a stock requires a separate margin setup.

Position size. Buying shares limits the position size on a small account; the dollar gain on a 1% move is small. A perp, by applying leverage, scales the position size up. Buying shares caps the dollar gain on a small account, not the upside of the stock itself. The stock can keep climbing forever; a $500 cash position simply cannot ride that climb at scale.

Owning shares carries dividend and voting rights. A perp does not. For a trader whose objective is directional exposure rather than long-term ownership, that distinction is often a feature rather than a drawback.

How a Stock Perp Differs from an Option

Options and perps both offer leveraged exposure to a stock. They are not interchangeable. The shapes of risk are structurally different.

Payoff shape. An option has a convex payoff: the upside grows faster than the downside, and the maximum loss on a long option is the premium paid. A perp has a linear payoff: every 1% move in the underlying stock produces a fixed leverage-multiple move in the position, in either direction. A perp gives similar leveraged directional exposure to what options offer, but with a linear payoff rather than the convex one a long option has.

Time decay. Options lose value as expiration approaches; that decay is called theta. Perps have no expiration date, so they are not exposed to theta in the same way. Perps do carry a periodic funding rate that plays a role in carry costs, addressed below.

Complexity. Options come with an entire vocabulary: strikes, expirations, implied volatility, the Greeks. A perp has a price, a leverage multiple, a margin amount, and a funding rate. Two of those numbers (price, leverage) are decisions; two (margin, funding) are mechanics. The mental model is closer to a spot position than an options chain.

What the Funding Rate Actually Is

A perp tracks a stock's price, but it is not literally the stock. The contract needs a mechanism to keep the perp price aligned with the underlying stock. That mechanism is the funding rate.

The funding rate is a periodic payment that flows between long holders and short holders. When demand for long perp positions is high enough to push the perp price above the underlying stock price, longs pay shorts. When demand for short positions pushes the perp below the underlying stock price, shorts pay longs. The size of the payment scales with how far the perp price has drifted from the spot reference.

For a long-leaning trader, funding works like a small recurring carry cost when the perp trades at a premium. For a short, funding plays a similar role to the borrow costs traditional shorting carries. There are no traditional borrow fees on a perp; perps do charge a periodic funding rate that plays a similar role to borrow costs, usually small, occasionally meaningful in volatile markets.

Where Stock Perps Are Available Today

Perpetual futures as a product class are mature in some markets and still emerging in others. For single-name stocks specifically, availability for retail is still emerging and varies by platform. Some platforms support a wide list of single-name tickers; others limit perp coverage to indices, ETFs, or a small set of mega-caps.

On platforms that support stock perps, the trader posts margin, selects a ticker, picks a direction, and applies a leverage multiple within the platform's caps. On platforms that support extended-hour trading, that perp can stay open through nights and weekends on supported tickers. Always check the platform's specific list, leverage caps, and margin rules before posting size.

Key terms

Perpetual futures contract (perp)

A derivative contract that lets a trader take a leveraged position on the price of an underlying stock with no expiration date; positions are kept in line with the underlying stock price via periodic funding payments between longs and shorts.

Funding rate

A small periodic fee exchanged between longs and shorts on a perpetual futures contract; when the perp trades above the underlying stock's spot price, longs pay shorts, and vice versa. Funding keeps the contract price tied to the underlying stock price.

Margin

Cash posted as collateral to control a leveraged position; the position's notional value can be a multiple of the margin posted, based on the leverage ratio.

Direct leverage

Exposure that scales linearly with the underlying stock price — typically expressed as a multiple (e.g., 5x), where a 1% move in the stock produces a 5% move in the leveraged position.

Liquidation

Automatic closure of a leveraged position by the platform's risk engine when the trader's margin falls below the maintenance threshold; on retail venues with liquidation engines, this caps losses at the posted margin.

Maintenance margin

The minimum equity required to keep a leveraged position open; if equity falls below this level, the position is liquidated.

Mark price

A reference price the platform uses to calculate unrealized profit-or-loss and trigger liquidations; typically a blend of spot, futures, and trading-history inputs to avoid being moved by short-lived wicks.

Notional exposure

The dollar value of the position controlled, equal to the cash posted as margin multiplied by the leverage ratio.

Risks: Leverage, Liquidation, and Carry

Three risk vectors matter on a stock perp:

Amplified losses. Leverage scales returns and losses by the same multiple. A 2% adverse move on a 5x perp is a 10% loss on margin. Position-sizing for the leverage in use, not the cash on hand, is the discipline that separates surviving traders from blown-up ones.

Automated liquidation. Every leveraged position has a maintenance margin, a floor the equity cannot fall below. Hit the floor and the platform liquidates the position automatically. On most retail platforms with automated liquidation systems, max loss is bounded by the margin posted on a single position. Extreme volatility or slippage can theoretically exceed margin in rare cases.

Funding-rate carry. Funding flows in or out of the position at every funding interval. On a multi-day or multi-week hold, that carry compounds. Trades with a singular directional view of price, i.e. up or down, can be right and still leak value through funding rates if most other traders are positioned the same way.

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