The investment seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of the SSGA Gender Diversity Index, which tracks U.S. companies that are leaders in advancing women through gender diversity on their boards of directors and in management. Under normal market conditions, the fund generally invests substantially all, but at least 80%, of its total assets in the securities comprising the index. In addition, it may invest in equity securities that are not included in the index, cash and cash equivalents or money market instruments. The fund is non-diversified.