Basis risk
The basis of a futures contract is defined as the difference between the futures price of the contract used to hedge (F0) and the spot price of the asset to be hedged (S0).
Basis risk
Future price and the spot price
Volatility
Imbalances
Changes
Assumptions
Basis risk may arise if
The future used to hedge the asset is not based on the exact underlying asset that is to be hedged
If the investor is uncertain about when the asset must be bought or sold
If the hedge requires the futures contract must be closed out before the expiration date