Derivative is a financial instrument or other contract within the scope of IAS 39 (see paragraphs 2–7) with all three of the following characteristics:
(a) its value changes in response to the change in a specified interest rate, financial instrument price, commodity price, foreign exchange rate, index of prices or rates, credit rating or credit index, or other variable, provided in the case of a non-financial variable that the variable is not specific to a party to the contract (sometimes called the ‘underlying’);
(b) it requires no initial net investment or an initial net investment that is smaller than would be required for other types of contracts that would be expected to have a similar response to changes in market factors; and
(c) it is settled at a future date.
Source: IAS 39 Financial Instruments: Recognition and Measurement.