Tag Archives: Top five stocks

Historical Percentage Of S&P 500 Market Cap Held By Five Biggest Stocks

The below chart has been making the rounds on Twitter. It shows the percentage of the S&P 500 market cap which is held by the top 5 biggest stocks in the S&P 500. Currently the concentration in these five stocks is at 19%. This is not a record percentage as this percentage has been much higher in the past.

Historical percentage of S&P 500 market cap held by the five largest stocks 1990 - 2020
Historical percentage of S&P 500 market cap held by the five largest stocks 1990 – 2020

Currently these five stocks are: Microsoft, Apple, Amazon, Google & Facebook.

Top 10 S&P 500 stocks by market cap (Blackrock)
Top 10 S&P 500 stocks by market cap

If you zoom in on just the two biggest stocks by market cap (Microsoft and Apple) the percentage of these two in the S&P 500 is almost 10%.

Percentage of S&P 500 market cap held by top two stocks
Percentage of S&P 500 market cap held by top two stocks

However, this chart shows that this concentration in just five stocks has been much higher in the past. In the 1960’s concentration was above 25%.

Historical percentage of S&P 500 market cap held by the five largest stocks 1964 - 2018
Historical percentage of S&P 500 market cap held by the five largest stocks 1964 – 2018