The S&P 500 ETF Trust SPDR is also known as the SPY ETF and is also one of the most popular funds and it also aims at tracking the Standard & Poor's 500 Index, and it also comprises 500 large and midcap US stocks. The stocks here are selected by a committee that is based on market size, industry, and liquidity. The S&P 500 ETF Trust SPDR does also serve as one of the major benchmarks of the United States market and indicates the financial stability and health of the national economy. The S&P 500 ETF Trust SPDR is also a well-diversified basket of assets that allocates its funds to multiple sectors, like, information technology, healthcare, financial services, communication services, industrials, consumer defense, consumer cyclical, utilities, and real estate. The trust also allocates all of its funds to common stocks that are included in the S&P 500 index. It is a trust that is structured as a unit investment trust.;