The investment seeks investment results that correspond generally to the performance, before the fund's fees and expenses, of an equity index called the Zacks Multi-Asset Income Index. The fund invests at least 90% of its total assets in securities that comprise the index and depositary receipts representing securities that comprise the index. The Zacks Multi-Asset Income Index is comprised of approximately 149 securities selected, based on investment and other criteria, from a universe of domestic and international companies. The securities comprising the index include stocks of small and medium-sized companies.