The Trust's Holdings are comprised of the 500 stocks in the S&P 500 Index, which is designed to capture the price performance of a large cross-section of the U.S publicly traded stock market. The main objective of the fund is to replicate the total return of the S&P 500 Index. The SPDR Trust, Series 1 seeks to match the total return of the S&P 500 Index. To accomplish this, the trust utilized a full replication approach. With this strategy, all 500 securities of the S&P 500 Index are owned by the Trust in their approximate market capitalization weight.