The investment seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of the SSGA Large Cap Index. The fund generally invests substantially all, but at least 80%, of its total assets in the securities comprising the index. The index is designed to measure the performance of the large-capitalization segment of the U.S. equity market. The fund may purchase a subset of the securities in the index in an effort to hold a portfolio of securities with generally the same risk and return characteristics of the index. It is non-diversified.