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Most perp traders pay funding without thinking about it. A smaller group has built entire strategies out of collecting it — earning a yield that doesn't care whether the market goes up or down. This is funding rate arbitrage, the closest thing derivatives markets have to a structural income trade. Here's how it actually works, including the parts that can hurt you.
As covered in our perps primer, funding payments flow between longs and shorts to keep the perp price glued to spot. In bullish markets, perps usually trade rich and longs pay shorts — often persistently. The arbitrage:
Short the perp + hold the equivalent spot position. Your price exposure cancels out (delta-neutral), but the funding payments keep landing in your account every interval.
Example: you buy 1 ETH spot and short 1 ETH-PERP of equal size. ETH pumps 10%? Spot gains, short loses — net zero. ETH dumps 10%? Short gains, spot loses — net zero. Meanwhile, if funding runs at 0.01% per 8 hours, you're collecting roughly 10–11% annualized on the position size, market direction irrelevant. During manic periods, annualized funding on hot assets can spike far higher.
The classic. On Hyperliquid you can buy spot and short the perp in one account — one venue, one margin pool, minimal moving parts.
Funding rates differ between venues. If BTC funding is +0.015%/8h on exchange A but +0.002%/8h on exchange B, you can short on A and long on B: price cancels, and you pocket the funding spread. Keeping funded accounts on Hyperliquid, Aster and Lighter — none of which require KYC — is exactly how spread traders stay ready for these windows.
Where yield-bearing collateral exists, the carry stacks: on Aster your margin can sit in USDF earning yield while the short leg collects funding on top.
Funding arb margins are thin — often fractions of a percent per week. Trading fees eat directly into them, and rebalancing means paying fees repeatedly:
| Venue | Taker fee | Round trip on $100K |
|---|---|---|
| Typical CEX | 0.05% | $100 |
| Hyperliquid | 0.045% (less with discounts) | $90 |
| Aster | 0% maker / 0.04% taker | $0 (maker) – $80 (taker) |
| Lighter | 0% | $0 |
This is why Lighter's zero-fee model matters so much for this strategy: entering, exiting and rebalancing the perp leg costs nothing, which keeps small funding edges profitable that would be fee-negative anywhere else.
Serious funding traders keep all three venues funded and ready: Hyperliquid (4% fee discount), Aster (rewards boost) and Lighter (0% fees + points). No KYC on any of them — setup takes minutes.
Compare the Venues →