SPDR S&P Metals and Mining ETF seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of an index derived from the metals and mining segment of a U.S. total market composite index. In seeking to track the performance of the S&P Metals & Mining Select Industry Index (the "index"), the fund employs a sampling strategy. It generally invests substantially all, but at least 80%, of its total assets in the securities comprising the index. The index represents the metals and mining segment of the S&P Total Market Index ("S&P TMI"). The fund is non-diversified.