An investment instrument based on a range of index values is disclosed that allows investors to take risk positions relative to the size, or length, of the range. The investment instrument has a monetary value that increases as the index value increases within a low range interval of the range, decreases as the index value increases within a high range interval of the range, and is fixed or capped if the index value falls within a middle range interval of the range. Typically, one settlement amount will be zero and the other will be an amount greater than the investment instrument price.