What is the S&P 500 and how do I invest in it? By: MarketWatch October 29, 2020 at 04:01 AM EDT Here’s an introduction to how S&P 500 funds work, and whether one might be a good fit for your portfolio. Read More >> Related Stocks: Alphabet-A Alphabet-C Amazon.com Apple Berkshire Hathaway Facebook Johnson & Johnson Microsoft Procter & Gamble Visa