Spot, futures and perpetuals: what is the difference?

Definition

A spot trade exchanges money for the asset itself: settle the trade and you own coins you can withdraw. A futures contract, as Investor.gov’s glossary describes it, is an agreement to buy or sell an asset at a set price on a set future date — you own a contract, not the asset, until settlement. A perpetual is a crypto-native futures variant with no expiry date at all: it tracks the underlying price indefinitely through a periodic funding mechanism between longs and shorts, so the position lasts as long as its collateral does. All three can express the identical market view; they differ in ownership, duration, counterparty structure and what failure looks like.

How it works

Spot is the simplest chain of obligations: once settled, the asset is yours, and your remaining risks are custody and the asset’s price. There is no expiry, no margin call and no counterparty maintaining your position — which is why spot holdings can be moved to self-custody while derivative positions cannot.

A dated future interposes a contract. You post collateral — margin — rather than paying the full price, which creates leverage; the venue marks your position daily and can demand more collateral or close you out. At expiry the contract settles, either by delivering the asset or, more commonly in crypto, by cash-settling against a reference price. Because expiry forces the futures price and the spot price together, dated futures carry a built-in convergence schedule, and holding exposure across expiries requires rolling into the next contract.

A perpetual removes the expiry and with it the automatic convergence. In its place, venues apply periodic funding payments between the long and short side — the mechanism BitMEX’s perpetual contracts guide documents for the original crypto perpetual — to pull the contract price toward a spot index continuously. The practical consequences: exposure never has to be rolled, but it accrues a running cost or income stream, and the position exists only inside a venue’s margining system, marked against that venue’s index and mark prices.

Why it matters

Which instrument dominates determines how a market moves. An asset whose turnover is mostly perpetuals responds to leverage conditions — funding, margin, forced closes — in ways a spot-dominated market does not. When CML analysis distinguishes a spot-led move from a derivatives-led one, this instrument difference is the entire point: spot buying transfers the underlying asset, and can tighten tradable float when the buyer then withdraws it to self-custody, locks or stakes it — whereas perpetual buying creates offsetting long and short exposure that can unwind as fast as it appeared. Spot that stays on an exchange remains sellable, so a spot trade does not remove float automatically; what removes float is the custody behavior that follows it.

The instrument also determines what a stated price means for you. A spot price is what asset changed hands at; a futures price embeds time and financing until a known date; a perpetual price hovers around spot by construction but can dislocate exactly when markets are most stressed. Reading any of them as interchangeable quotes for “the price” erases the mechanics that connect them.

Risks and misconceptions

The characteristic spot risk is custody: exchange failure, withdrawal freezes or key loss can cost the entire holding with the market unchanged. The characteristic derivative risks are leverage and dependence on the venue: an adverse move can consume margin and force closure before any thesis resolves, and the position’s value depends on the venue’s solvency, index construction and rulebook — including rules that change mid-stress.

The common misconception is that derivatives are simply “riskier spot”. They are differently risky. An unleveraged, cash-settled future can be a conservative instrument; a spot position on a failing exchange can be a total loss. A second misconception is that perpetual prices are the asset’s price — they are a venue’s contract tracking an index, and premium or discount to that index is information about positioning, not noise. The details of funding arithmetic and liquidation engines are deliberately out of scope here; those mechanics have their own guides.

Practical example

Three traders want exposure to the same coin at 100 dollars. The first buys one coin spot for 100 dollars and withdraws it; her position survives anything except losing the coin or the price falling. The second buys a future expiring in March at 103 dollars, posting 20 dollars margin; the 3-dollar premium reflects time and financing, converges to zero by expiry, and his position can be force-closed if the price drops far enough against his margin. The third opens a perpetual long at 100.20 with 20 dollars margin; she pays or receives funding every interval, and her position lasts indefinitely — or until an adverse move exhausts her collateral. Same view, three different failure modes.

What changes over time

Product menus change with regulation and demand: regulated cash-settled futures expand institutional access, venues list and delist perpetual pairs, and collateral rules shift between coin-margined and stablecoin-margined designs. Each change alters who can hold exposure and what happens under stress, without any change to the underlying asset.

Watch where turnover and open interest sit across the three instrument types for an asset you follow. A migration of activity from spot to perpetuals, or from offshore perpetuals to regulated futures, changes the market’s reflexes — how it responds to leverage stress, expiry calendars and index disruptions — and that migration is itself a market signal worth reading.