The goal of the SPDR S&P 500 Trust ETF (SPY) is to get net returns that match the S&P 500 Index.The goal of SPYX, also referred to as the SPDR S&P 500 Fossil Fuel Reserves Free ETF, is to remove the carbon footprint from the S&P 500.
SPY or SPDR S&P 500 ETF Trust is the first index that copies the index while targeting a price of 10% of the S&P 500. Since its inception, it has been one of the most actively traded ETFs, even with the introduction of other S&P 500 ETFs.