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Dow Jones Industrial Average (DJIA) Explained: A Guide to the US 30

Pepperstone
Market Analyst
Apr 11, 2024
The US 30 is a stock market index that tracks the performance of 30 leading, publicly traded companies in the United States. While not necessarily the largest companies, they are chosen based on factors like reputation, growth, and investor interest.

US 30

The US 30 (also known as WS30, DJ30 or Wall Street 30) – often also referred to as the Dow Jones Industrial Average, Dow Jones, Dow, or DJIA – is a stock market index tracking 30 of the most prominent industrial companies listed on stock exchanges within the United States. These companies are not necessarily the largest by overall company value, but they are well-established and influential.

Understanding the Price-Weighted Index

It is one of the oldest, and most widely followed, equity indices, particularly by financial media, although most money tracking the US equity market has since migrated to follow the broader US 500.

In contrast to most other major equity indices, the US 30 is price weighted, rather than market cap weighted, meaning that the higher an individual stock’s price, the greater the weight that it will have in the index.

Calculating the US 30

The DJIA's value is relatively simple to calculate. It's done by adding the stock prices of all 30 member companies and then dividing that sum by a factor called the "Dow Divisor." This divisor is adjusted whenever a stock split occurs within the index but currently sits around 0.1517.

Selection Process and Focus on Diverse Representation

There is no specific selection process by which stocks are selected to become members of the Dow, with the selection committee instead focusing on a range of criteria including “an eligible company's reputation, its history of sustained growth, its interest to investors, and its sector representation of the broader market”.

Past Performance Not a Future Guarantee

The historical performance of the US 30, which is no guarantee of future results, is shown below.

Preview

The weightings of US 30 constituents, at the time of writing, is as follows:

PositionStockTickerWeighting as of 27/02/2024
1Unitedhealth Group IncUNH8.8%
2Microsoft CorpMSFT6.8%
3Goldman Sachs Group IncGS6.5%
4Home Depot IncHD6.2%
5Caterpillar IncCAT5.5%
6Salesforce IncCRM5.0%
7Mcdonald's CorpMCD5.0%
8Amgen IncAMGN4.8%
9Visa Inc Class A SharesV4.8%
10Travelers Cos IncTRV3.7%
11American Express CoAXP3.6%
12Boeing CoBA3.4%
13Honeywell International IncHON3.3%
14Intl Business Machines CorpIBM3.1%
15Jpmorgan Chase & CoJPM3.1%
16Apple IncAAPL3.0%
17Amazon.com IncAMZN2.9%
18Johnson & JohnsonJNJ2.7%
19Procter & Gamble CoPG2.7%
20Chevron CorpCVX2.6%
21Merck & Co. Inc.MRK2.2%
22Walt Disney CoDIS1.8%
23Nike Inc Cl BNKE1.8%
243m CoMMM1.5%
25Coca Cola CoKO1.0%
26Walmart IncWMT1.0%
27Dow IncDOW0.9%
28Cisco Systems IncCSCO0.8%
29Intel CorpINTC0.7%
30Verizon Communications IncVZ0.7%

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