In financial derivatives trading, contract and U are commonly used trading units. A contract is a unit used to express the transaction volume, and U is the smallest unit of change for a specific financial product.

Different financial products have different contract sizes and minimum change units. 1 The value change of the contract is equal to 1 U, for example, in stock index futures trading, the contract unit may be 100 shares, and the minimum change unit may be 0. 1 point. 1 The value change of the contract is equal to 1 the minimum change unit (u), so it can be said that 1 the contract is equal to1u.