What is the Funding Rate?
The funding rate is a periodic payment mechanism in perpetual futures markets that keeps the contract price aligned with the underlying spot price. It represents the cost or income of holding a perpetual position and is exchanged directly between long and short traders, not paid to the exchange.
How Funding Rates Work
When demand for long positions exceeds shorts, the perpetual price trades above spot. In this scenario, the funding rate becomes positive, and long position holders pay short position holders. This payment incentivizes more shorts and fewer longs, pushing the perp price back toward spot.
Conversely, when the perp trades below spot meaning more shorts than longs, the funding rate turns negative. Shorts pay longs, incentivizing long positions and pushing prices back up toward spot.
Funding Rate Calculation
Funding rates are typically calculated based on the premium or discount of the perpetual price versus the spot index price, plus an interest rate component. The formula varies by platform but generally considers the time-weighted average premium over the funding interval.
Payments occur at fixed intervals, usually every 8 hours at standard times, though some platforms use hourly or continuous funding. The payment amount equals the funding rate multiplied by position size.
Impact on Trading Strategies
Funding rates significantly affect trading profitability. Holding a position in the dominant direction, such as long in a bullish market, means consistently paying funding. Over time, these payments can substantially erode profits.
Savvy traders consider funding rates when planning positions. High positive funding on longs might suggest waiting or shorting. Extremely negative funding creates opportunities for longs to be paid while holding.
Funding Rate Arbitrage
Funding rate arbitrage involves capturing funding payments while hedging directional risk. A trader might short the perp collecting positive funding while holding spot or another derivative to hedge. This delta-neutral position profits purely from funding without directional exposure.
Interpreting Funding Rates
Funding rates reflect market sentiment and positioning. Persistently high positive rates suggest bullish excess and potential overheating. Persistently negative rates indicate bearish positioning. Extreme funding rates often precede volatility as the funding cost becomes unsustainable for one side.