That means just four companies made up nearly 21% of the S&P 500 at the end of 2021. Tesla, Meta (parent of Facebook), Nvidia, Berkshire Hathaway B shares, and UnitedHealth rounded out the top 10 stocks. This means investors in the S&P 500 index, which is meant to represent a broad range of the stock market, have been purchasing more and more of these big companies as they’ve grown larger. So their investment is now not as “broad,” or diversified, as they might expect. “The market is changing and now, you may not be invested in what you think.” said Silverblatt. “People should be aware of that and maybe concerned there might be too much power by some companies. Do you worry people in government may have too much power and it’s not balanced? It’s the same with the market.” Have a question, comment, or story to share? You can reach Medora at medoralee@thebalance.com.
