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Guide to the Dow Jones Industrial Average

Known by many names, including DJIA, the Dow 30, Industrial Average, DJI or even just the Dow, the Dow Jones Industrial Average is a major stock market index, one of several that was established by the co-founder of Dow Jones & Company, Charles Dow. This index dates back to 1886 and today, it is owned by S&P Dow Jones Indices, and stands as the most important of the Dow Averages. It is the 2nd oldest market index in the United States, with the oldest (the Dow Jones Transportation Average) having also been created by Charles Dow. The Industrial Average index reveals how 30 of the largest publicly owned companies with a base in the US have been trading over a standard stock market trading session. The term “Industrial” in this index’s title is a relic from its history as today, most of the modern companies on the index are not related to traditional heavy industries. The average is price-weighted and is currently a scaled average to take into account any effects of adjustments and stock splits. The index’s value does not represent the actual average of its component stock prices but instead, the sum of its component prices once they have been divided by a divisor which enables a consistent value to be generated for the index. At the present time, the divisor is less than one and therefore the index’s value is bigger than the total of its component prices. The Dow Industrial Average has been designed to gauge how the American industrial sector is performing in terms of the nation’s economy, however its performance today is influenced by a range of factors including foreign and domestic political events like terrorism, war and natural disasters as well as economic and corporate reports. The Dow Jones Industrial Average is one of the most commonly watched indices in the world among investors and is considered to be one of the best indicators of the health of the US equity market.

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History of the Dow Jones Industrial Average

dow jones logoCharles Dow created the first stock average in 1884, made up of 2 industrial companies and 9 railroads and this became known as the Dow Jones Transportation Average. His first average of industrial stocks was calculated in 1886 and this was the beginning of the Dow Jones Industrial Average. Originally composed of 12 industrial companies, the only one still found on the index today from the initial make up is General Electric. Upon its first publication, the level of the index was 62.76, and in its early period it experienced many large price moves as the industrial economy of the country reached maturity. It was in 1928 that the number of stocks making up the Dow was increased to 30, and over the next two decades, the level of the index fluctuated hugely due to the conflicts of that era including the Second World War. During the 1950s, the Dow began to climb ever higher, despite the Cold War, Algerian War and Korean War and two recessions over that period. By the end of the decade, the Dow’s level had reached 616. Even through the economic uncertainties of the 1960s and 1970s, the Dow still continued to make respectable gains, until in 1972 the average closed for the first time above the 1000 mark. This turned out to be a brief high, as the 1973-1974 Stock Market Crash led to its level losing almost half of its value, dropping to 577.60. Throughout the end of the decade and into the recession of the early 1980s, the level rose and fell numerous times until the 1990s saw the advent of the dot com boom. In 1995, the Dow closed above 5000 for the first time and continued to rise ever higher to levels of over 8000 by July 1997, while 1999 saw celebrations on the trading floor as the Dow finally closed above 10,000 for the first time. Over the early years of the new Millennium, the DJIA saw several downturns thanks to the events of September 11th 2001, the Lehman Brothers bankruptcy and several other economic incidents. As the decade turned, the Dow experienced some volatility, but was generally moving upwards once more until today, it is generally closing at levels of over 18,000.

What are the Current Companies Listed on the Dow Jones Industrial Average Index?

Although the premise of the DJIA is the same today as when it was first created, the companies which are listed on the index have changed over time. Today, less than 50% of the companies listed in the top 30 appeared on the list in 1989, and only 5 of the companies have been listed for 50 years. General Electric is the only remaining company from the conception of the index. While originally, the companies on the Dow index were traditional heavy industries, today only around two thirds are in the manufacturing industry, with the rest being made up from diverse industries such as financial services, information technology and entertainment. Some of the current companies on the DJIA include Boeing, Walmart, Apple, American Express, Coca Cola, Goldman Sachs, IBM, McDonald’s, Nike, Pfizer and Microsoft.

How is the Dow Jones Industrial Average Calculated?

The Dow Jones Industrial Average is a price weighted index, and this means that stocks that have a higher share price have a greater weighting in the index. When the Dow was established, the average was calculated by adding together the prices of all 12 of the component stocks and dividing the total by 12. However since that time, there have been several subtractions and additions to the index, with stock splits and mergers having to be accounted for. Whenever an event like this takes place, the Dow’s divisor is adjusted so that its value will not be affected. This explains why the Dow Industrial Average can be at a level of 17,000 or 18,000 when the total of its component stock prices could not match that number.

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