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What is the spot–futures basis?

Understand why futures differ from spot and which reference prices matter.

Smart Coin editorialUpdated 2026-08-18About 7min

Align the reference prices

Index, mark and last-traded prices are different even for the same asset.

Separate perpetual and dated futures

Dated futures tend toward spot near expiry; perpetuals use a funding mechanism.

Risks behind a wide basis

Execution cost, liquidation, funding and pre-expiry moves can erase an apparent spread.

Frequently asked questions

Does positive basis always mean a bullish market?

No. Interpret it with contract structure, expiry, funding and the reference price.

Sources

Reviewed against official material. Verify current details at the original source.

General information only—not investment advice or a guarantee of returns.