A cash-and-carry trade pairs ownership of an asset with a short futures position referencing that asset. The intended source of return is a difference between the purchase price of spot and the sale price of the future, after costs and subject to the contracts performing as expected. The label “market neutral” describes an intended reduction in directional exposure, not the absence of risk.
The details matter: dated futures are not perpetual contracts, a positive quoted spread is not a guaranteed net profit, and separate trading legs can create separate funding obligations. This article uses simplified examples to examine those distinctions. It is part of the Altcoin Hedge Alpha Strategies library, which treats an alleged edge as a hypothesis to investigate.
1. Identify exactly where the return is supposed to come from
For a dated futures contract, the futures basis is the difference between the futures price and the relevant spot price. A positive basis can make a buy-spot, sell-futures trade appear attractive. The analysis still needs financing costs, trading costs, settlement terms, and the ability to hold both legs through the intended period.
The BIS working paper Crypto carry examines spot-futures differences in Bitcoin and Ether and discusses market segmentation and limits to arbitrage capital. Those findings are about the markets and periods studied; they are not an estimate of a present opportunity in every altcoin. They support asking why a spread exists rather than treating it as unexplained free money.
State the trade's expected mechanism in one sentence. “Capture a known entry spread through matching settlement” is different from “Collect future funding payments.” Mixing the two produces misleading cost estimates and makes the exit conditions difficult to define.
2. Calculate a simplified dated-futures example
Example: a matched expiry
Assume one unit of a fictional asset can be bought for $100 while a matching future expiring in 90 days can be sold for $103. Assume cash-equivalent settlement against the same price and no default. If the asset finishes at $80, the spot position loses $20 and the short future gains $23. The combined gross result is $3.
If the asset instead finishes at $140, the spot position gains $40 and the short future loses $37. The combined gross result is again $3. The matching terminal reference is what makes the simplified arithmetic work. A different settlement reference, unit convention, or exposure can change the result.
Now subtract an illustrative $1 financing cost and $0.80 in combined execution and operating costs. The remaining $1.20 is not the same as the $3 headline spread. These invented costs demonstrate the calculation only. They are not market quotes, typical fees, or evidence that such a trade can currently be implemented.
3. Choose the denominator before reporting a return
The $3 gross result in the example is 3% of the $100 spot purchase price. But the capital committed may also include derivative collateral, an additional liquidity reserve, and operational buffers. Reporting return only on the smallest deposit can exaggerate the economic efficiency of the complete trade.
Suppose the example also requires $25 of separately funded collateral. If the full $125 is committed, the $1.20 modeled net result is 0.96% of that amount. If additional resources must be held available, show them too. The useful denominator depends on the question being asked, but it must be disclosed consistently.
Annualizing a short-period result can also mislead. Repeating the same spread and costs over multiple future periods is an assumption, not a property of the original trade. Report the actual modeled holding period first. Label any annualized illustration clearly and do not imply that the same opportunity will remain available.
4. Distinguish dated basis from perpetual funding
A perpetual contract does not have the same ordinary scheduled expiry convergence as a dated future. Its funding arrangements are intended to help align its price with a reference, but actual payment schedules and calculation methods depend on the venue. Funding can change direction or magnitude while a trade remains open.
A spot-long, perpetual-short position might receive funding under one set of conditions and pay it under another. Projecting one observed payment across months assumes a stable future rate. The position also retains execution costs, collateral needs, and the possibility of a price mismatch when it is closed.
Build separate analyses for the two structures. A dated trade should explain the settlement mechanism and any roll. A perpetual trade should explain the sensitivity of results to different funding paths and the planned exit rule. Neither deserves to be described as predictable yield merely because the two notional positions initially offset.
5. Stress the route to settlement
A favorable terminal result does not eliminate interim cash demands. In the earlier example, a rise from $100 to $140 creates a loss on the short before the position is closed. The spot asset may have gained, but the venue supporting the short may still require resources at a particular time.
Test whether those resources can actually be accessed. The asset may be held elsewhere, pledged, delayed in transfer, or subject to trading restrictions. Selling part of the spot leg to fund collateral changes the original exposure. Borrowing to preserve the trade adds a new cost and another obligation.
The portfolio stress-testing article uses path-based scenarios for this reason. Evaluate both a terminal profit calculation and a sequence of cash demands. A trade that survives only when separate systems move funds instantly depends on an operational assumption that deserves its own test.
6. Examine the non-price exposures
Counterparty and custody arrangements can dominate a trade whose directional exposure is small. Determine which entities owe settlement, where collateral is held, and whether assets are encumbered. A theoretical futures gain is not equivalent to cash already available in a separate account.
Execution creates another vulnerability. Entering one leg before the other temporarily creates an outright position. Quoted depth may not support the intended size, and the second leg may move before it can be completed. Plan the sequence, the maximum acceptable slippage, and how to unwind an incomplete entry.
Do not ignore small operational details such as contract multipliers, expiry timestamps, and the denomination of fees. A mistaken unit conversion can overwhelm the intended basis capture. The fund due-diligence framework applies similar questions when a manager, rather than an individual, operates the strategy.
7. Attribute results instead of celebrating the label
After a trade, separate the entry basis, financing, funding, transaction costs, residual price exposure, and operational losses. Reconcile those components to the final result. This is how an analyst learns whether the intended mechanism generated the outcome or whether profit came from an accidental directional position.
Compare estimated with realized costs. A small systematic underestimation of spread or financing can erase a strategy whose expected edge is modest. Record failed and abandoned trades as well as completed ones; excluding them can make implementation look easier than it was.
A research process should also specify conditions under which the strategy is not attempted. These may include insufficient liquidity, unclear settlement, excessive dependence on one venue, or an unfavorable spread after conservative costs. Choosing not to trade is a valid outcome of the analysis, not evidence that the process failed.
Conclusion: neutrality is a limited claim
Cash-and-carry can reduce one form of price exposure under matching assumptions, while retaining financing, basis, execution, custody, and counterparty risks. The spread is only the beginning of the analysis. The capital required to survive the path matters as much as the modeled expiry payoff.
A clear assessment identifies the return mechanism, the relevant denominator, the costs, and the conditions needed for both legs to perform. It distinguishes dated futures from perpetual funding and acknowledges where the model stops. That is more informative than a market-neutral label attached to a percentage with no explanation.
