The State Street SPDR S&P Oil & Gas Equipment & Services ETF seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of the S&P Oil & Gas Equipment & Services Select Industry Index (the "Index")Seeks to provide exposure to the oil and gas equipment and services segment of the S&P TMI, which comprises the Oil & Gas Drilling sub-industry and the Oil & Gas Equipment & Services sub-industrySeeks to track a modified equal weighted index which provides the potential for unconcentrated industry exposure across large, mid and small cap stocksAllows investors to take strategic or tactical positions at a more targeted level than traditional sector based investing