Why Funding Rates Matter More Than Most Traders Realize
Most traders focus on entry price and leverage. Fewer pay attention to funding rates — the ongoing cost (or income) of holding a perpetual futures position. Over days and weeks, funding can silently compound into a significant portion of your P&L.
What Are Funding Rates?
Perpetual futures have no expiration date. To keep the perpetual price anchored to the spot price, funding payments flow between longs and shorts:
- When the perpetual price is above spot, longs pay shorts (positive funding)
- When the perpetual price is below spot, shorts pay longs (negative funding)
The rate adjusts based on the imbalance between long and short open interest. More longs than shorts = higher positive funding.
The Hidden Cost
A "small" funding rate compounds quickly:
| Annualized Rate | Daily Cost ($10k position) | Monthly Cost | Quarterly Cost |
|---|---|---|---|
| 15% APR | $4.11 | $123 | $370 |
| 50% APR | $13.70 | $411 | $1,233 |
| 100% APR | $27.40 | $822 | $2,466 |
| 200% APR | $54.79 | $1,644 | $4,932 |
At 200% APR, a $10,000 position loses $1,644 in one month just from funding — regardless of whether the price moves in your favor.
What to Compare Across Exchanges
- Is funding capped? Some exchanges cap rates (e.g., Exolane caps at ±15% APR). Others have no cap, allowing spikes to 300%+ during volatile periods.
- How often does funding settle? Some settle every 8 hours (Binance-style), others settle continuously. Continuous settlement means the rate is always accurate but can change rapidly.
- Does the protocol take a cut? On some exchanges, the protocol retains a portion of funding. Exolane passes 100% of funding between traders with 0% protocol share.
- What is the current rate? Check the current funding rate before opening a position. A high rate in your direction can significantly affect whether a trade is profitable.
When Funding Works in Your Favor
Funding isn't always a cost. If you're on the receiving side:
- Shorting during a bull market (when longs pay shorts) earns funding income
- Going long during extreme bearish sentiment (when shorts pay longs) earns funding income
Some traders use "funding rate farming" — taking positions specifically to earn funding. This carries its own risks (adverse price movement can exceed funding income).
Practical Takeaways
- Always check the current funding rate before opening a position.
- For positions held longer than a few hours, factor funding costs into your profit target.
- Prefer exchanges with capped funding if you plan to hold positions for days or weeks.
- Be aware that funding direction can flip — you might start earning funding and end up paying it.
- Compare the total cost of a trade across exchanges: fees + funding + liquidation penalties.