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Headline cash-and-carry yields fall by half after fees and margin split
Headline funding rates mask execution fees, capital fragmentation across venues, and short perp liquidation risk that cut cash-and-carry yields.
Funding Rate Mechanics and Basis Yields
A 10,000 USD basis trade collecting Bybit's 0.0100% 8-hour BTC funding rate yields 547.50 USD annually in gross payments, but round-trip taker fees and capital fragmentation reduce effective returns.
Cash-and-carry trading isolates the funding rate spread by pairing a long spot position with an equal short perpetual futures position. The combined delta remains zero because price movements in the spot holding offset mark price changes in the short perpetual contract. When funding is positive, long position holders pay short position holders every 8 hours.
The payout depends on the current rate across venues and assets.
| Asset | OKX 8h Rate | MEXC 8h Rate | Bitget 8h Rate | Bybit 8h Rate | 8h Spread | 24h Volume |
|---|---|---|---|---|---|---|
| ETH | +0.0055% | +0.0057% | +0.0100% | +0.0100% | 0.0045% | 6,421,241,757 USD |
| BTC | +0.0028% | +0.0085% | +0.0056% | +0.0100% | 0.0072% | 5,455,339,209 USD |
| SOL | +0.0008% | +0.0032% | +0.0080% | +0.0100% | 0.0092% | 1,588,683,389 USD |
| SNDK | +0.0000% | N/A | +0.0000% | +0.0000% | 0.0000% | 1,413,316,920 USD |
| ZEC | +0.0100% | +0.0031% | +0.0087% | +0.0100% | 0.0069% | 612,380,408 USD |
| XAU | +0.0102% | +0.0054% | +0.0071% | +0.0000% | 0.0102% | 528,996,703 USD |
Annualising an 8-hour rate of 0.0100% produces a headline rate of 10.95% (0.0100% multiplied by 3 settlements per day multiplied by 365 days). However, headline rates assume full capital deployment into the short side, zero trading friction, and static funding environments.
Capital Splitting and Leverage Restrictions
Capital cannot be fully deployed into the cash leg. To maintain a delta-neutral position, available funds must be divided between spot acquisition and margin posting for the short perpetual contract.
In a total allocation of 10,000 USD, allocating 5,000 USD to spot purchase leaves 5,000 USD for short perpetual collateral. If the short position is held at 1x leverage, the short contract value is limited to 5,000 USD. Funding is collected only on the 5,000 USD short contract, not the full 10,000 USD portfolio. This automatically halves the effective yield relative to total capital from 10.95% to 5.475% annually.
Increasing short leverage raises the notional short position back to 10,000 USD using 2x leverage on the 5,000 USD margin allocation. However, higher leverage introduces liquidation risk on the short leg during upward price moves.
Liquidation Risk on Delta-Neutral Positions
Delta neutrality protects portfolio equity across spot and futures, but liquidation mechanics operate strictly on isolated or cross-margin engines within individual accounts.
Consider a 10,000 USD allocation deployed as 5,000 USD spot BTC and 5,000 USD margin on a 10,000 USD short BTC perpetual contract (2x short leverage). The initial short entry is 100,000 USD BTC price.
- If BTC increases by 45% to 145,000 USD, the short perpetual loss reaches 4,500 USD.
- At 2x leverage, maintenance margin requirements trigger forced liquidation on the short position before reaching a 50% price increase.
- Spot holdings appreciate by 4,500 USD, preserving total account equity in theory.
- In practice, the short position is liquidated, incurring an exchange liquidation penalty fee. The position becomes unhedged, leaving the portfolio fully long spot exposure.
To avoid short-leg liquidation, capital must be manually transferred from spot to futures margin during upward trends, incurring transfer delay risk and execution slippage.
Fee Drag and Breakeven Thresholds
Opening and closing two separate legs requires four discrete trades: spot buy, futures short sell, spot sell, and futures short cover. Fee structures determine how quickly a trade reaches profitability.
| Exchange | Spot Taker Fee | Spot Maker Fee | Futures Taker Fee | Futures Maker Fee | Round-Trip Taker Cost (5,000 USD Leg) |
|---|---|---|---|---|---|
| Bitget | 0.10% | 0.10% | 0.030% | 0.020% | 13.00 USD |
| Bybit | 0.10% | 0.10% | 0.055% | 0.020% | 15.50 USD |
| MEXC | 0.05% | 0.00% | 0.020% | 0.000% | 7.00 USD |
| OKX | 0.10% | 0.08% | 0.050% | 0.020% | 15.00 USD |
On Bybit, placing taker orders for a 5,000 USD spot buy and a 5,000 USD short perpetual contract generates 7.75 USD in entry fees (5.00 USD spot taker fee plus 2.75 USD futures taker fee). Exiting via taker orders adds another 7.75 USD, creating a total fee drag of 15.50 USD.
At a Bybit BTC funding rate of 0.0100% per 8 hours, the 5,000 USD short contract earns 1.50 USD per day (0.50 USD per 8-hour settlement).
- Days to cover round-trip taker fees: 15.50 USD divided by 1.50 USD per day equals 10.33 days.
- Holding the position for less than 11 days results in a net loss despite continuous positive funding rates.
- On MEXC, round-trip taker costs equal 7.00 USD, requiring 4.66 days of funding payments to break even at a 0.0100% rate.
- On OKX, at a lower funding rate of 0.0028% per 8 hours, daily collection on a 5,000 USD short position is 0.42 USD. Round-trip taker fees of 15.00 USD require 35.7 days to cover.
Using maker limit orders on both legs reduces round-trip fee drag on Bybit to 12.00 USD (10.00 USD spot maker fee plus 2.00 USD futures maker fee), requiring 8 days of funding to reach breakeven.
Capital Allocation Impact
Executing cash-and-carry positions requires incorporating venue fee schedules, margin allocation splits, and liquidation thresholds directly into yield calculations. Headline funding rates represent gross capacity before accounting for operational friction and capital fragmentation.
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