Market condition is a condition upon which the exercise price, vesting or exercisability of an equity instrument depends that is related to the market price of the entity’s equity instruments, such as attaining a specified share price or a specified amount of intrinsic value of a share option, or achieving a specified target that is based on the market price of the entity’s equity instruments relative to an index of market prices of equity instruments of other entities.
Source: IFRS 2 Share-based Payment