Spot-Futures Spread Arbitrage

Spot-futures spread arbitrage involves buying an asset in the spot market while simultaneously selling it in the futures market, capturing the price difference.

This is a market-neutral strategy: you profit from the spread, not from price direction. Whether BTC goes up or down, your hedge protects you.

The strategy works with both delivery futures (where convergence is guaranteed at expiry) and perpetuals (where ongoing funding payments replace convergence).

1. Identify opportunity: Look for futures trading at a meaningful premium to spot. The premium must exceed your total costs (fees, slippage, funding if perpetual).

2. Calculate position size: Determine how much capital to deploy. Ensure adequate margin for the futures leg even if price moves significantly.

3. Prepare both orders: Use limit orders where possible to reduce slippage. Have exact quantities calculated for dollar-neutral hedging.

4. Execute simultaneously: Enter both legs as close together as possible. Any timing gap creates temporary directional exposure.

5. Monitor position: Track margin levels, funding accrual (for perpetuals), and basis changes. Rebalance if the hedge drifts.

6. Exit: For delivery futures, hold until expiry. For perpetuals, exit when the opportunity deteriorates or you have captured target profit.

Never deploy all capital in a single position. Leave buffer for margin calls and additional opportunities.

A conservative approach uses 20-30% of available capital per position. This allows for 3-5 concurrent trades and margin buffer.

The futures margin requirement depends on leverage. At 10x, you need 10% of notional as margin. Add buffer for adverse moves.

Example: $10,000 capital, 25% allocation = $2,500 position. At 10x leverage, $250 margin plus buffer.

Entry timing matters. Spreads tend to widen during volatile periods and compress during calm periods.

Avoid entering right before funding timestamps if using perpetuals—rates can be volatile around these times.

Use limit orders to control slippage. Market orders on both legs can cost 0.1-0.2% in slippage, eating into thin margins.

Consider partial entries: scale into position as spread widens rather than entering all at once.

Set maximum position size limits regardless of apparent opportunity quality.

Monitor margin levels continuously. Add margin proactively rather than reactively.

Have exit triggers: basis threshold, margin level, time limit.

Diversify across pairs and exchanges rather than concentrating in single positions.

Track realized performance against expectations. If results consistently disappoint, reassess your edge.