Calculate your true net APR, deduct 4-leg trading fees and slippage friction, and determine the exact break-even holding period for perpetual funding rate arbitrage.
| Gross Funding Yield Collected (90 settlements) | +$108.00 |
| Round-Trip Trading Fees (4 legs @ 0.02%) | -$16.00 |
| Round-Trip Execution Slippage (4 legs @ 0.01%) | -$8.00 |
| Borrow Interest Cost (0.0% APR) | -$0.00 |
| Net Retained Profit (Holding Window) | $84.00 (0.84%) |
Delta-neutral on paper does not guarantee zero liquidation risk! In sharp crypto rallies, your short perpetual leg can get liquidated before you can realize offsetting spot gains. Keep short leverage under 3x and monitor funding rate sign flips.
Funding rate arbitrage is a market-neutral trading strategy. When perpetual futures trade at a premium to spot, longs pay shorts a periodic funding fee (usually every 8 hours). By buying spot crypto and simultaneously opening an equal-sized short perpetual position, you eliminate directional price risk (delta-neutral) while collecting funding payments as passive yield.
A headline funding rate of 40% APR represents gross theoretical income before expenses. Getting into and out of both the spot and perpetual positions requires executing four trades (2 entry, 2 exit). If you pay taker fees (e.g. 0.05% per leg) plus slippage (0.02% per leg), round-trip friction equals 0.28%. On thin funding or short holding periods, transaction costs easily exceed all collected funding.
The break-even holding threshold divides total round-trip friction by the funding rate per interval: Break-Even Intervals = Round-Trip Cost % / Funding Rate %. For example, if total friction is 0.24% and funding is +0.012% per 8h, you must hold the position for 20 intervals (6.67 days) before generating even $1 of net profit.
If the market sentiment turns bearish and perpetual contracts trade at a discount to spot, the funding rate turns negative. In negative funding regimes, short positions must PAY longs. If funding stays negative, you will suffer a daily cash bleed until you close the position.
Yes! In most exchanges, spot holdings and perpetual futures margins sit in separate wallets. If the underlying asset suddenly surges by 30-50%, the short perpetual position can hit its liquidation price and be closed out by the exchange with liquidation penalties, even though the spot leg has appreciated equally.
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