Futures Basis

What Is the Futures Basis?

The futures basis is the difference between the futures price (for delivery at a future date) and the current spot (cash) price:

Basis = Futures Price − Spot Price

In a normally functioning market, futures trade at a premium to spot (positive basis / contango) reflecting the cost of carry — the financing cost, storage costs, and insurance associated with holding the physical asset until delivery.

Cost-of-Carry Formula

For financial assets (no storage cost):

• Futures Price = Spot Price × e^(r − d)T
• Where r = risk-free rate, d = dividend yield, T = time to delivery

For commodities, add storage costs and subtract the convenience yield (the benefit of holding physical inventory). When the convenience yield exceeds financing + storage costs, futures trade below spot (backwardation).

Basis Risk

Basis risk is the risk that the relationship between futures and spot prices changes unexpectedly. A farmer who hedges his wheat crop with futures faces basis risk if the local price for his wheat diverges from the Chicago exchange price. Basis risk is why futures hedges are imperfect.

The Bitcoin Futures Basis

Bitcoin futures basis (the annualised premium of CME BTC futures over spot) is a key indicator in crypto:

• High basis (>10% annualised): Bull market; demand for leveraged long exposure via futures is intense
• Low/negative basis: Bear market or risk-off; shorts dominate or arbitrageurs are selling futures
• During the 2021 bull run, annualised BTC futures basis reached 40%+

The Treasury Futures Basis

The cash-futures basis in US Treasuries is closely watched:

• Convergence trades by hedge funds involve buying cheap cash Treasuries and shorting futures — highly leveraged
• Basis blowouts (as in March 2020) can force rapid deleveraging and create systemic stress in the Treasury market