The concentration ratio for an oligopoly is Over 60 percent.
- The concentration ratio reveals the intensity of rivalry among the businesses that make up an industry.
- It measures the size of the firms in relation to the total industry. The presence of a monopoly in a certain industry or the absence of competition for such enterprises are both indicated by high concentration ratios that are closer to 100%.
- As a general rule, an oligopoly is present when the top five companies in the market account for more than 60% of all market sales.
- When one company's concentration ratio equals 100 percent, the market is said to be monopolized.
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