Funding rate

Ordinary futures contracts expire, and at expiry their price has to meet the price of the asset itself. Perpetual futures never expire, so they need another way to stay close to the real market. The funding rate is that mechanism: a small payment, exchanged every few hours, that pulls the contract back toward spot whenever it drifts.

How funding works

The exchange compares the perpetual contract's price with an index of spot prices. If the perpetual trades above spot, more traders want to be long than short, and the funding rate is positive: longs pay shorts. That payment makes holding a long more expensive and a short more attractive, which tends to close the gap. If the perpetual trades below spot, the rate turns negative and shorts pay longs. Payments often settle every eight hours, though some venues settle hourly. The exchange does not keep them; they pass directly between traders.

A simple example

A trader holds a long perpetual position worth 10,000 dollars. At the next settlement, the funding rate means longs pay 1 dollar for every 10,000 dollars of position, so the trader pays 1 dollar and a short of the same size receives 1 dollar. With three settlements a day, that is about 3 dollars a day, or roughly 1,100 dollars over a year if the rate stayed put, which it rarely does. In a frenzy the rate can climb many times higher; in a sell-off it can flip, and the short starts paying instead.

How the rate is calculated

Most exchanges build funding from two parts. An interest component is a small, mostly fixed rate that reflects the cost of borrowing the two assets in the pair. A premium component measures how far the perpetual traded above or below the index over the period, and it usually dominates. Many venues also cap funding per period, so in extreme markets the rate sits at the cap and the gap to spot can persist.

What funding tells you

Funding works as a sentiment gauge. Persistently high positive funding means many traders are paying to stay long with leverage, which can come before sharp drops when those positions unwind. Deeply negative funding signals crowded shorts. Traders watch it across venues, alongside open interest and liquidation data.

Funding and hedged positions

Some strategies hold an asset and short the same amount in perpetual futures. The position is delta-neutral: price moves on the two legs cancel out, and what remains is the funding received on the short. Some synthetic dollars are built this way, which is why their income rises and falls with funding. When funding turns negative, the same position pays instead of earning.

Risks and limits

• Funding is a variable payment and can stay negative for long periods.
• Rates differ between exchanges and can change abruptly from one settlement to the next.
• Positions on centralized exchanges carry the exchange's own risk: if a venue fails or freezes withdrawals, a hedge can break.
• Leverage magnifies everything, and a sharp move can liquidate one leg of a hedged position before it is rebalanced.
• Funding income tends to rise when markets are euphoric, which is also when it can disappear fast.