What is the bitcoin basis trade?

The bitcoin basis trade is a strategy that buys bitcoin, or a fund that holds it, and sells bitcoin futures at the same time. If futures trade above spot, the trader locks in that difference, called the basis, and collects it as the two prices meet when the contract expires. It is also known as a cash and carry trade.

How does the bitcoin basis trade work?

CME Group defines basis as the futures price minus the spot price. When futures are higher than spot, a situation called contango, a trader buys spot and sells futures. The two positions offset each other, so the trade is meant to be neutral to whether bitcoin rises or falls.

CME gives a hypothetical example in which futures sit about 1% above spot. The trader buys spot and sells futures. At expiry both settle at the same price, so whatever the spot leg gains or loses, the futures leg roughly cancels. What is left is about the original 1% gap, before trading and financing costs.

When futures trade below spot, called backwardation, the trade can be run in reverse. For the basics of futures, see crypto futures and leverage.

Why does the basis trade use bitcoin ETFs?

US spot bitcoin ETFs launched in January 2024, giving institutions a regulated, easy-to-hold spot leg. CME notes that leveraged funds increased net short positions in CME bitcoin futures after the launch, which it reads as hedging spot holdings rather than betting on a fall.

A February 2025 DL News report cited a 10x Research estimate that 56% of ETF buying to that point was tied to such strategies. Read more in what is a bitcoin ETF.

What happens when the basis trade unwinds?

The trade only makes sense while the basis pays more than the cost of money. When the gap narrows toward short-term interest rates plus costs, funds tend to close positions by selling ETF shares and buying back futures.

DL News reported in February 2025 that CME bitcoin futures open interest had fallen 25% from its December 2024 peak as the premium shrank, alongside heavy ETF outflows. The Block reported in April 2026 that average daily CME bitcoin futures open interest had dropped to its lowest level in over two years, and named the basis trade unwind as one likely reason. That is why analysts watch ETF inflows and outflows for signs of this trade, not only for directional demand.

What are the risks of a basis trade?

The trade is not risk-free. Futures require margin, so a sharp price move can force a trader to post more collateral before the positions converge. CME notes that the basis can swing sharply with momentum, sentiment and financing costs, and that futures traders can lose more than they deposit. Fees, ETF tracking differences and the cost of borrowed money all eat into a small spread.

A similar idea exists on crypto exchanges using perpetual futures, where traders collect payments described in what is a funding rate instead of a fixed expiry gap.