The Basis Trade Explained: Cash and Carry in Crypto for BTC and ETH

The basis trade is the simplest delta-neutral yield strategy in crypto, and the one most institutional desks run quietly in the background. Long spot BTC or ETH, short an equivalent amount in perpetuals or dated futures, collect the spread. When funding is healthy, the trade prints. When funding goes negative, it bleeds. Knowing which regime you are in is the entire game.

This guide covers what the basis trade is, the mechanics in both perpetual and dated-futures form, where the yield actually comes from, the real risks (some of which kill the trade entirely), how to read basis curves, and when the strategy is and isn’t worth running.

What is the basis trade?

The basis trade is a market-neutral position that earns yield from the structural premium of crypto futures and perpetuals over spot. The two legs cancel out the directional exposure, so you don’t care which way BTC moves. What you care about is the spread between the two prices, and how that spread is paid out over time.

Two forms of the trade are common in crypto:

• Perpetual basis trade. Long spot BTC, short BTC perpetual. Yield is the funding rate paid by long perp holders to short perp holders every eight hours. No expiry, so the trade can run indefinitely.
• Dated futures basis trade. Long spot BTC, short a quarterly or monthly BTC futures contract. Yield is the spread between the futures price and spot, captured at expiry when futures settle into spot. Has a fixed end date.

The traditional finance name for this is cash and carry arbitrage, since the trade buys the underlying asset (cash leg) and shorts the derivative (carry leg). Most crypto desks use “basis trade” and “cash and carry” interchangeably.

The mechanics: long spot, short perp

Walking through the perpetual version because it is the most common and operationally simpler.

1. Buy spot BTC. Either on a spot exchange like Coinbase or Kraken, or via an exchange that supports cross-margin with their derivatives leg.
2. Short an equivalent dollar amount of BTC perpetual on a derivatives venue (Bybit, Binance, OKX, Deribit). At roughly $60,000 spot, one BTC of spot longs is hedged by shorting 1 BTC worth of perp contracts.
3. Now your position is delta-neutral. BTC moves up 10%? Your spot leg makes 10%, your short perp loses 10%. Net exposure is zero.
4. Every eight hours, funding settles. If funding is positive (perp trading above spot, which is the usual state), longs pay shorts. You receive that payment as the short side.
5. Annualise the funding rate over a year and that’s your gross yield. Subtract spreads, fees, and any slippage from rebalancing.

The dated futures variant follows the same pattern but replaces the perp with a fixed-expiry futures contract. The yield comes from the basis spread (futures price above spot price) rather than from periodic funding, and it’s locked in at the moment you put the trade on. If a quarterly future trades at $63,000 with spot at $60,000, the 5% spread over three months is the yield, regardless of what BTC does between now and expiry.

The perp version compounds. The dated version locks in. Most traders use perps for the flexibility; institutional desks sometimes prefer dated futures for the certainty.

Where the yield actually comes from

The yield isn’t magic and it isn’t free. It comes from leveraged longs paying for the privilege of being long BTC with borrowed capital. When perpetual funding is positive, it means perp is trading above spot, which means more leverage is buying long than is selling short. Those long buyers pay funding to whoever is willing to take the other side. The basis trader is willing to take the other side, in exchange for fully hedging the directional risk.

This is the structural reason crypto basis yields exist and persist. Crypto has a structural demand for leveraged long exposure: retail traders chasing upside, hedge funds with mandate to be long, institutional inflows. That demand is met by basis traders willing to provide the short side without taking direction.

When the demand for leveraged longs disappears, so does the yield. After major liquidation events, funding flips negative for days or weeks because the leveraged longs got flushed. In those regimes, the basis trade earns nothing or loses on the short leg. Knowing when the yield regime has changed is the most important part of running the trade.

Reading basis curves and term structure

For dated futures, the term structure of basis is the curve of futures prices across different expiries. A typical curve looks like:

• Spot at $60,000
• One-month future at $60,500 (+0.8% basis)
• Quarterly future at $62,000 (+3.3% basis)
• Six-month future at $63,500 (+5.8% basis)

Annualised, that curve implies roughly 10-12% per year yield on the dated trade, varying by expiry. Steep upward curves mean strong demand for leveraged longs over time. Flat curves mean the demand has thinned. Inverted curves (futures trading below spot, called backwardation) mean stress: traders are paying to short rather than long.

Reading the curve helps you pick which expiry to short. The longest-dated future with a healthy basis usually offers the best yield per unit of capital, with the trade-off that you’re locked in longer.

The real risks in basis trading

The trade gets called “risk-free” or “market neutral” in marketing copy. It is neither, and the real risks are mostly operational rather than directional.

Funding flipping negative

The main directional-ish risk. If you’re long the basis trade and funding goes from +0.05% per 8 hours to -0.05% per 8 hours, you flip from earning yield to paying it. The trade mechanics still work but the P&L turns negative until funding recovers. In sustained negative-funding regimes, you close.

Venue risk

FTX took out a meaningful chunk of basis traders in November 2022. Several smaller exchanges have done the same since. If the venue holding your spot or short perp leg fails, you lose access to that capital regardless of your position. The mitigation is to spread across reputable venues with proven withdrawal records, but this is a real, recurring risk in crypto.

Liquidation risk on the short leg

The short perp position is leveraged on most venues. If BTC rips 30% upward and your perp short doesn’t have enough margin, the exchange liquidates the position. Your spot leg is still long BTC, so the directional P&L is still hedged, but you’ve been forced out of the yield-generating leg. Sizing the perp short with adequate margin headroom is essential.

Withdrawal freezes

During major market stress, exchanges sometimes pause withdrawals. If you’re trying to rebalance during one of these windows and can’t move capital, the trade structure breaks down even though both legs are still technically open.

Execution slippage

Entering and exiting basis trades requires moving size in both spot and derivatives markets simultaneously. Slippage on entry directly compresses your expected yield. Most sophisticated traders use algos or split execution across multiple venues to minimise this.

Cross-venue basis arbitrage

The same basis trade can be run as a cross-venue arbitrage when funding rates diverge between exchanges. If Bybit BTC perp pays +0.05% funding and Binance BTC perp pays -0.01%, a desk can short Bybit perps and long Binance perps without any spot leg, collecting the funding spread. This is a pure funding-arbitrage strategy.

It works when funding spreads are wide enough to cover trading costs and venue risk. In practice, sophisticated market makers arbitrage these spreads continuously, so cross-venue funding rates stay within tight bands during normal markets. The opportunity opens during stress events when capital flows between venues are disrupted.

When the trade actually works

Basis trade economics depend on a small number of regime variables. The setup is most attractive when:

• Funding is comfortably above zero, ideally 10%+ annualised. The closer to zero, the thinner the margin against fees and slippage.
• Dated futures basis is steep. A normalised term structure with 5%+ basis on quarterly contracts indicates demand for leveraged longs is structural, not transient.
• Realised volatility is moderate. Extreme vol forces rebalancing and increases liquidation risk on the short leg. The trade prefers consistent, moderate-vol markets.
• Spot and derivatives capital can move freely. During market stress, withdrawal restrictions or banking problems can lock capital in the wrong place.
• The risk-free rate (US T-bills) is not too attractive. When T-bills pay 5%+, the basis trade has to clear that bar plus carry costs. In higher-rate environments, the basis yield needs to be meaningfully higher to be worth the venue and operational risk.

Practical considerations

A few practical points that separate desks that actually run this trade from desks that only think about it.

• Size for the short leg margin. Use lower leverage on the short perp than your venue allows. A short with 5x leverage is far safer than one at 25x, and the difference in capital efficiency is small relative to the difference in liquidation risk.
• Rebalance on a schedule. Spot and perp values diverge as price moves. Pick a rebalance threshold (5% drift is typical) and stick to it.
• Watch funding daily, not just at entry. A trade that was attractive when funding was 15% annualised becomes unattractive at 3%. Exit before the spread compresses too far.
• Use multiple venues for redundancy. Single-venue concentration is the most common way the trade fails outright. Spreading reduces returns slightly and reduces tail risk substantially.
• Account for tax implications. Tax treatment of spot vs derivatives varies by jurisdiction and can change the after-tax yield meaningfully. This is a real consideration for institutional-size capital.

Common misconceptions

“The basis trade is risk-free.” Marketing claim, not reality. The directional exposure is hedged. The venue, funding, liquidation, and operational risks are very real and have killed plenty of capital.

“Funding always pays.” Funding flips negative regularly, sometimes for weeks at a time. During those windows the trade earns nothing or loses.

“Higher leverage on the short side is free.” Higher leverage on the short perp doesn’t increase your yield. It only increases your liquidation risk during sharp moves. The capital efficiency comes from cross-margining, not from leverage on either leg in isolation.

“You need millions to run this.” The trade scales down. The minimum useful size is whatever covers your trading costs and rebalancing slippage as a small percentage of expected yield. For most retail venues, that floor is in the low five figures.

Frequently asked questions