Spot and futures: two markets, two different claims

The spot price is the price at which the asset actually changed hands. That makes it the most direct evidence available about demand, because every trade in it required a buyer to fund a purchase and take custody of the asset. A sustained rise in the spot price means buyers were willing to pay progressively more for coins they intended to hold, and sellers were willing to part with them at those prices. Neither side was merely expressing a view; both were moving the asset.

Spot markets also carry the information that derivative markets cannot: where the coins went. A purchase that moves coins from an exchange to a self-custodied wallet is a different event from a purchase that leaves them on the venue, and the two have different implications for how much supply is immediately available to trade. That is why the site treats the spot record as the spine of its price history, and why the price history page is built from exchange trade data rather than from any derivative series.

The limitation of spot data is that it says nothing about intent beyond the moment of the trade. A large spot purchase may be a long-term holder accumulating or a market maker replenishing inventory. The tape records the transaction, not the reason for it, and any inference about who was buying is an interpretation rather than a fact the data contains.

A futures price is a forecast with a cost attached. Because the contract must be margined and marked to market, holding a position requires capital to be posted and maintained, and a participant who is wrong will be asked for more margin or closed out. That structure means the futures market is where leverage is visible. The gap between the futures price and the spot price — the basis — is the market's price for carrying exposure forward, and it widens when demand for leveraged long exposure is strong and narrows or inverts when it is not.

The futures market is also where participants who cannot or will not hold the asset can express a view. A fund that is prohibited from holding bitcoin directly can take long exposure through a cash-settled contract. A miner can sell forward to lock in a price for coins not yet mined. A trader with no interest in the asset itself can take either side purely on a price view. None of these participants appears in the spot record, and all of them appear in the futures record.

The consequence is that futures data is richer in some respects and weaker in others. It shows positioning, leverage and the cost of carry, which spot data cannot. It does not show ownership, because no asset changes hands until settlement, and cash-settled contracts never deliver the asset at all. A reader who treats a rising futures price as evidence that coins were bought has misread the instrument. The open interest and funding rates page takes up the two measures that describe that positioning directly.

The two markets are linked by arbitrage, and the link is what keeps the futures price tethered to the spot price. If a futures contract trades persistently above spot, a participant can buy the asset and sell the contract, carry the position to settlement and collect the difference. That trade — the cash-and-carry basis trade — is profitable only while the gap exceeds the cost of financing the position, and the act of putting it on pushes the two prices back together. The same logic works in reverse when futures trade below spot.

The tether is not instantaneous and it is not perfect. It depends on participants being able to borrow cash cheaply, to hold the asset through to settlement, and to post margin on both legs. When any of those conditions tightens — in a funding squeeze, or when the market moves fast enough that margin requirements rise — the basis can widen sharply and stay wide for longer than a simple arbitrage model would predict. A wide basis is therefore ambiguous: it may signal strong leveraged demand, or it may signal that the arbitrage that would normally close the gap has become expensive to run.

For a reader trying to understand demand, the practical rule is to read the two markets together and to be explicit about which claim each one supports. Spot prices and volumes support statements about what was bought and sold. Futures prices, open interest and funding support statements about positioning and leverage. The liquidity page explains why the depth behind each market matters as much as the price it prints, and the trading volume page explains why a volume figure from either market needs its venue and its method before it means anything.