It may be more straightforward and easier to rely on an exchange-traded fund or ETF. Those usually have a mix of different companies that help make the fund, and it can be easily bought off the stock market and traded if need be.
These S&P 500 ETFs track the S&P 500 index, which allows investors to have an investment that matches the market.For an investor, these two ETFs can make a good core of your portfolio or be the only investment in your portfolio.