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What Is Industry Concentration?

Jim B.
Updated May 16, 2024
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Industry concentration is an economic measurement of how the market share in a specific industry is divided between the companies operating within it. If one or a few companies dominate the majority of a market, that industry is said to be highly concentrated. When an industry has a large number of smaller companies, all containing small percentages of the overall market share, the industry concentration is low. This information can be helpful to investors, who are most likely to seek out the companies that command a large portion of the market share in a highly concentrated industry.

Every industry has a certain hierarchy in terms of the companies at the top that dominate the market and the ones at the middle and bottom that want to get to the top. While that hierarchy may change over time, it is likely that the major players in a well-established industry will remain unchanged. Newer industries may be fragmented in the beginning before settling to a point where major players begin to gobble up large portions of the market. The study of how market share is divided up between companies in an industry is known as industry concentration.

One way in which this is studied is through the use of what's called an "industry concentration ratio." The ratio is calculated by taking a certain group of companies, usually the top four in a market, and adding up all the market share they possess. A low ratio indicates a market that is extremely fragmented. If the ratio approaches 100, it means that the market is highly concentrated and that a small number of companies dominate the majority of the market.

A company that is one of the top performers in a highly concentrated market has a distinct advantage over the companies battling it out in a fragmented market. Any company that owns high industry concentration need not be so concerned with competition and can focus its energies on increasing profit margin. By contrast, companies in a fragmented market must keep prices low in order to stay competitive, thereby damaging profits.

Investors pay attention to industry concentration figures. The companies at the top in a concentrated industry are often the target of investors because of their consistency and reliability. On the other hand, a firm in an industry that is still relatively young may have greater potential. Stock for such a firm can be had at a low price, but it has great potential if both the industry and the firm rise to greater heights.

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Jim B.
By Jim B.
Freelance writer - Jim Beviglia has made a name for himself by writing for national publications and creating his own successful blog. His passion led to a popular book series, which has gained the attention of fans worldwide. With a background in journalism, Beviglia brings his love for storytelling to his writing career where he engages readers with his unique insights.
Discussion Comments
By umbra21 — On Apr 22, 2013

@Mor - I don't know if it would be considered concentrated or not, to be honest. I mean, it seems like there are a lot of companies, but most of them are owned by one or the other of the big companies in one way or another.

This kind of business stuff gets a bit complicated for me. I know there can be some money in predicting stock prices through things like studying the concentration index of an industry, but I definitely believe those studies which show that it's almost impossible to consistently make money off the stock market. Most of it is guess work.

By Mor — On Apr 21, 2013

I guess technically the global soft drink market would be considered low concentration because there are so many different types of drink out there, but you'd have to know a bit about it to realize they have had very little market share compared with Pepsi and Coke.

I mean, both of those seem to be the epitome of a stable company to invest in if that was what a person was looking for. On the other hand, as it says in the article, that does mean that the stock isn't going to move much, so it might pay off to try and get stock in a company that is going places instead.

By browncoat — On Apr 21, 2013

I always thought industrial concentration was the opposite of this, probably because the word concentration made me think of a lot of things in a small space. Glad I got this cleared up!

Not that I am in the market for stock or anything right now, but I think it's a good idea to start learning about this kind of thing before you ever start to dabble in it, as the information sinks in and makes connections over time with other facts and you gradually get better at understanding all the nuances.

Jim B.
Jim B.
Freelance writer - Jim Beviglia has made a name for himself by writing for national publications and creating his own...
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