Derivatives · Concept note
Funding Rate
A periodic payment between long and short positions that helps keep perpetual futures prices close to spot prices.
Definition
Funding is not a standard fee collected by the exchange. It is a payment exchanged between position holders at set times. A positive rate generally means longs pay shorts, while a negative rate means shorts pay longs. Always check the rate interval because the formula and payment schedule vary by exchange.
Why it matters
Funding may look small on a short trade, but it can accumulate across several payments when a leveraged position stays open. A high positive rate can indicate crowded longs and a deeply negative rate crowded shorts, but neither guarantees a reversal.
Calculation and example
Estimated funding payment = position notional × funding rate
For a 10,000 USDT long with a +0.01% rate at settlement, the estimated payment is 1 USDT. If that rate applies three times in one day and the position remains open, the simple total is about 3 USDT. The actual amount depends on the position value and exchange formula at each settlement.
What to check when interpreting it
- Assess the magnitude and persistence of the rate, not only its sign.
- Check whether price and open interest are rising together.
- Include funding, fees, and slippage in the total holding cost before entry.
Common misconception
A positive funding rate is not automatically a bearish signal. In a strong trend, elevated funding can persist much longer than expected.