Funding Rates
The cost of holding a perpetual position, and what it signals.
Overview
Perpetual futures have no expiry date, so something has to keep their price tethered to spot. That mechanism is funding: a periodic payment made directly between long and short holders.
- Data Type: Derivatives cost and positioning
- Primary Use: Gauging crowding and the cost of holding a position
- Typical Interval: Every 8 hours on most venues
How Funding Works
When the perpetual trades above spot, funding is positive and longs pay shorts. When it trades below spot, funding is negative and shorts pay longs.
This creates a direct financial incentive to take the less crowded side, which pulls the perpetual price back towards spot. The exchange does not take this payment; it moves between traders.
What Funding Tells You
Positive Funding
Longs are paying to hold. The perpetual is trading at a premium, indicating more demand for leveraged long exposure than short. Mildly positive funding is normal in a bull market.
Strongly Positive Funding
Longs are crowded and paying meaningfully for the privilege. This is a warning sign. Crowded leveraged longs are the fuel for a long squeeze, because their liquidations are market sells.
Negative Funding
Shorts are paying longs. Bearish positioning dominates. Deeply negative funding often appears near local bottoms, when pessimism is at its highest and shorts are most crowded.
Funding as a Cost
Funding is not only a sentiment gauge, it is a real expense. Holding a leveraged long through persistently high funding erodes returns, and for longer-horizon positions that drag can be substantial.
If you intend to hold for days or weeks, calculate the expected funding cost before entering. It is often larger than traders expect.
Funding and Open Interest Together
Funding tells you which side is crowded; open interest tells you how large the crowd is. Read together they are far more informative than either alone.
- High OI + strongly positive funding: Large, crowded long side. Squeeze risk to the downside.
- High OI + strongly negative funding: Large, crowded short side. Squeeze risk to the upside.
- Low OI + neutral funding: Little leverage in the system, moves more likely driven by spot.
Psychology Behind Funding
Extreme funding reflects consensus. When almost everyone is positioned the same way and paying for the privilege, the marginal buyer has already bought. Markets tend to move in the direction that inconveniences the largest number of leveraged traders.
Confirmation Signals
- Funding reaching an extreme relative to its own recent range
- Funding extremes coinciding with price at a major level
- Open interest confirming the size of the crowded side
- Similar readings across major exchanges
Weaknesses & Limitations
- Funding can stay extreme for a long time during strong trends
- It is a positioning gauge, not a timing tool
- Rates and intervals differ between exchanges
- Some of the flow is delta-neutral basis trading, not directional conviction
Example Use
Price is near a major resistance level, open interest is at a record high and funding has been strongly positive for several days. A trader does not short on that basis alone, but reduces long exposure and tightens stops, recognising the conditions for a squeeze are present.
Risk Management Notes
Never trade funding extremes in isolation. Crowded positioning can become far more crowded before it unwinds. Use funding to size positions and set expectations for volatility, in combination with price levels that define your invalidation.