
The S&P 500 is the benchmark index used by most investors. In fact, the SPDR S&P 500 ETF Trust (NYSEARCA: SPY) is one of the most widely held index funds for passive investors. Investing in the SPY has been a good strategy in the last few years as mega-cap technology stocks dominated the market.
This had the added benefit of giving investors exposure to themes like industrial automation, artificial intelligence (AI), and semiconductors.