Funding rate is a mechanism that anyone engaged in perpetual futures trading should absolutely understand. In simple terms, it’s the fee exchanged periodically between traders holding long and short positions. If you don’t understand this, unexpected costs can arise.

When the funding rate is positive, long position holders pay fees to short position holders. Conversely, if it’s negative, short holders pay long holders. In other words, money automatically moves between positions based on the market’s supply and demand balance.

The calculation of the funding rate consists of two elements. One is the interest rate, which reflects the borrowing cost difference between the base currency and the quote currency. The other is the premium index, which measures the difference between the perpetual contract price and the spot price. If the premium is positive, it means the contract price is higher than the spot price, indicating strong buying pressure. If negative, it indicates strong selling pressure.

The actual calculation method varies depending on the exchange, so caution is needed. For example, a major futures exchange adopts a fixed interest rate model, where the default interest rate is 0.03% per day, paid in three installments of 0.01% every 8 hours. Understanding these details makes risk management in trading much easier.

People holding positions in perpetual futures should see the current funding rate and a countdown to the next payment displayed on their trading screen. It’s important to check regularly and understand how much cost your position is incurring. The funding rate also serves as a signal indicating the current state of the market.