The investment seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of the Prime Treatments, Testing and Advancements Index. The index tracks the performance of U.S.-listed equity securities or depositary receipts of companies that (i) perform research, development, and commercialization of treatments or vaccines for infectious diseases or (ii) engage in the research, development, manufacturing, and provision of biological tests for patients. The fund invests at least 80% of its total assets in the component securities of the index. The fund is non-diversified.