Funding Basis

Funding basis refers to the price differential between a perpetual futures contract and its underlying spot asset price. In cryptocurrency markets, perpetual swaps do not have an expiration date, so they use a funding rate mechanism to anchor the contract price to the spot price.

When the funding basis is positive, the perpetual price is trading at a premium to the spot, and long position holders pay a fee to short position holders. When the basis is negative, the perpetual price trades at a discount, and short position holders pay long position holders.

This mechanism incentivizes traders to take positions that push the perpetual price back toward the spot price. It is a critical metric for understanding market sentiment, leverage demand, and the cost of maintaining a directional bias.

Arbitrageurs monitor this basis closely to execute cash-and-carry trades, which involve buying the spot asset and shorting the perpetual contract to capture the funding spread.