📖 What is Basis Trading?
Basis trading is a market-neutral trading strategy that profits from the difference between the futures price and the spot price of an asset — known as the basis. The strategy involves taking opposite positions in the spot and futures markets to capture the basis as it converges to zero at the futures contract's expiry.
Basis trading is often referred to as cash-and-carry arbitrage because it involves "carrying" the spot asset while holding the futures position. It is considered a low-risk, market-neutral strategy because it is not reliant on the direction of the underlying asset's price — it profits from the convergence of the futures and spot prices.
Basis trading is market-neutral. Your profit does not depend on whether the asset price goes up or down — it depends on the basis converging to zero. This makes it a popular strategy for institutional traders and hedge funds.
🧮 What is the Basis?
The basis is the difference between the futures price and the spot price of an asset.
Normal Market (Contango)
- Futures price is above the spot price.
- Basis is positive.
- This is the most common state in crypto markets.
- The basis reflects the cost of carry (interest, storage, etc.).
Inverted Market (Backwardation)
- Futures price is below the spot price.
- Basis is negative.
- This is less common and often occurs in bearish markets or during supply shortages.
BTC spot price is $60,000. The quarterly futures price is $61,000. The basis is $1,000 (positive). As the futures contract approaches expiry, the basis will converge to zero — the futures price will move closer to the spot price.
💼 Cash-and-Carry Arbitrage (Contango)
When the futures price is above the spot price (contango), you can profit from the basis through cash-and-carry arbitrage.
How It Works
- Step 1: Buy the spot asset.
- Step 2: Simultaneously sell (short) the futures contract of the same size.
- Step 3: Hold both positions until expiry.
- Step 4: At expiry, the futures price converges to the spot price.
- Step 5: Close both positions. You profit from the initial basis.
BTC spot: $60,000. BTC quarterly futures: $61,000. Basis = $1,000.
You buy 1 BTC spot ($60,000) and short 1 BTC futures ($61,000).
At expiry, spot price is $59,000. Futures price converges to $59,000.
Spot loss: $1,000 ($60,000 → $59,000). Futures profit: $2,000 ($61,000 → $59,000).
Net profit: $1,000 (minus fees).
Pros: Market-neutral, low risk, predictable profit, no directional exposure.
Cons: Requires significant capital, funding/interest costs can eat into profits, liquidity constraints for large positions.
🔄 Reverse Cash-and-Carry (Backwardation)
When the futures price is below the spot price (backwardation), you can profit from the basis through reverse cash-and-carry arbitrage.
How It Works
- Step 1: Sell (short) the spot asset (or borrow and sell).
- Step 2: Simultaneously buy (long) the futures contract of the same size.
- Step 3: Hold both positions until expiry.
- Step 4: At expiry, the futures price converges to the spot price.
- Step 5: Close both positions. You profit from the negative basis.
BTC spot: $60,000. BTC quarterly futures: $59,000. Basis = -$1,000.
You short 1 BTC spot ($60,000) and long 1 BTC futures ($59,000).
At expiry, spot price is $61,000. Futures price converges to $61,000.
Spot loss: $1,000 ($60,000 → $61,000). Futures profit: $2,000 ($59,000 → $61,000).
Net profit: $1,000 (minus fees).
🔄 Basis Trading with Perpetual Futures
Basis trading can also be done with perpetual futures, but there are important differences.
Key Differences
- No Expiry: Perpetual futures have no expiry, so the basis doesn't converge to zero in the same way.
- Funding Rate: Instead of convergence, perpetual futures use a funding rate mechanism to keep the contract price aligned with the spot price.
- Basis Trading Strategy: In perpetuals, basis trading involves capturing the funding rate. You buy spot and short perpetual (or vice versa) to earn the funding rate.
Basis trading with quarterly futures relies on price convergence at expiry. Basis trading with perpetual futures relies on earning the funding rate. Both are valid strategies, but they work differently.
⚠️ Risks of Basis Trading
While basis trading is considered low-risk, it is not risk-free. Here are the key risks to consider.
The basis could widen instead of narrowing, reducing your profit or causing a loss. This can happen due to market volatility or supply/demand imbalances.
In perpetual futures, funding rates can change unexpectedly, affecting your profitability. High funding costs can eat into your returns.
You are exposed to the exchange's solvency and operational risk. If the exchange fails, you could lose your funds.
If the market lacks liquidity, you may not be able to enter or exit positions at desired prices, affecting your profitability.
Basis trading requires simultaneous execution of spot and futures trades. If one leg executes at a different price, the trade may be unprofitable.
Your capital is locked in the trade for the duration of the contract. This may prevent you from taking other opportunities.
To manage basis trading risk, always calculate your break-even basis before entering a trade. Factor in all costs (fees, interest, funding) to ensure the basis is large enough to generate a profit.
🛠️ How to Execute a Basis Trade
Follow these steps to execute a basis trade effectively.
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1
Identify the Basis
Check the futures price and spot price. Calculate the basis (Futures - Spot). Ensure the basis is large enough to cover your costs and generate a profit.
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2
Calculate Costs
Factor in trading fees, interest (if borrowing), funding rates (for perpetuals), and any other costs. Calculate your break-even basis.
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3
Open Positions
Buy the spot asset and sell the futures contract (for contango) or sell spot and buy futures (for backwardation). Ensure the position sizes are equal.
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4
Monitor the Trade
Monitor the basis and your costs. Ensure your positions are maintained and that you have sufficient margin.
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5
Close at Expiry or When Profitable
At expiry, the basis will converge to zero. Close both positions. Alternatively, you can close early if the basis has narrowed sufficiently to lock in a profit.
Basis trading is a professional strategy that requires careful execution. Always calculate your break-even basis and factor in all costs before entering a trade.
❌ Common Mistakes in Basis Trading
Avoid these errors that can turn a low-risk strategy into a losing one.
- Not factoring in all costs. Trading fees, interest, funding rates, and slippage can eat into your profits. Always calculate your net basis.
- Mismatched position sizes. If your spot and futures positions are not equal, you are exposed to directional risk. Ensure they are perfectly hedged.
- Holding until expiry without monitoring. The basis can widen unexpectedly. Monitor the trade and close early if conditions change.
- Ignoring liquidity. If the market lacks liquidity, you may not be able to execute your trades at desired prices.
- Using the wrong contract. Ensure you are using the correct futures contract (quarterly, perpetual) for your strategy.
- Not considering funding rates. In perpetual futures, funding rates can significantly affect your profitability. Factor them into your calculations.
Not calculating the break-even basis. A basis that looks profitable at first may turn out to be a loss after factoring in all costs. Always calculate your break-even basis before entering a trade.