Period an investor plans to invest. There are several choices to make, i.e., 1, 2, 3, 5, 7 and 10 years. If an investor's investment horizon is three years, the TaraFolioTM engine examines stocks that have been listed for at least 3 or more years on a specified exchange. So, Investment Horizon is closely related to the Listing Period for each stock. The investment planning horizon may be one or two years or as long as ten years. The TaraFolioTM engine does not recommend stocks that have not been listed on an exchange for less than one year.