The table below lists the total market capitalization of Dow Jones Industrial Average (DJIA) stock index. In 12/31/2017, the combined market value of all the companies part of the index was $6,873,564.3 million, 19.9% higher than it was one year ago. The market cap of S&P 500 index in September 2017 was $22,595,979.4 million which makes the total value of the S&P 500 around four times as large as the DJIA’s value.
Dow Jones Industrial Average Index Total Market Cap
|Date||DJIA Index Value||Index Total Market Cap (USD, M)|
Purchase the individual market caps of all current & past DJIA index companies since 3/31/1979. Check a sample file from here.
The growth of Dow Jones companies during the past 45 years.
Between 1970 and 2015, the average yearly growth in the total market cap of Dow 30 index has been 9.9%. The decade with the fastest growth was 1990s but this include the excessive valuations before the dot-com boom. Between 2000 and 2009, the growth was negative 0.1%, mainly because of the financial crisis of 2000. The financial crisis decreased the value of the Dow Jones companies temporarily almost by half. The market values quickly recovered but there were casualties. The crisis dropped AIG and Citigroup from the index when Travelers and Cisco took their place. The values of the companies have steadily growing since 2008 but the growth began to halt during 2015 and 2016 started with large turbulence in stock markets around the world so the long bull market might be over.
Apple was the most valuable public US company at the time but was not added to the index until March 2015 when it replaced AT&T. Of the most valuable companies, both Alphabet (ex-Google) and Berkshire Hathaway are also missing from Dow. Instead of information technology, the largest sector of the index is financial companies.