Glossary term
Market Power
Market power is the ability of a firm or group of firms to keep prices above competitive levels, restrict output, or otherwise influence market terms without losing all their customers.
Byline
Written by: Editorial Team
Updated
What Is Market Power?
Market power is the ability of a firm or group of firms to influence prices, output, or other market terms without losing all their customers to rivals. A company with market power is not just accepting the market price. It has some room to set terms more favorably than would be possible under perfect competition.
Market power sits at the center of competition analysis. It helps explain why some firms can defend margins, why regulators watch concentration, and why some industries behave very differently from the competitive benchmark.
Key Takeaways
- Market power is the ability to influence price or output beyond what a price-taking firm could do.
- It often comes from limited competition, differentiation, scale, or durable entry barriers.
- Market power exists on a spectrum rather than as an all-or-nothing condition.
- It is closely tied to barriers to entry, market share, and industry concentration.
- Some market power may reflect a strong business model, but excessive market power raises antitrust concerns.
Where Market Power Comes From
Firms gain market power from several sources. Product differentiation can make customers less price-sensitive. High startup costs or economies of scale can keep rivals out. Regulation, patents, control of distribution, or network effects can also reduce competitive pressure.
In some cases, market power comes from concentration itself. A monopoly is the clearest example, but firms in an oligopoly may also have meaningful market power, especially if entry is difficult and competition is limited.
Market Power Versus Pricing Power
Concept | Main focus |
|---|---|
Market power | Broad ability to influence market terms, including price and output |
Narrower ability to raise or maintain price without losing too much demand |
Pricing power is one expression of market power, but market power is broader. It includes not only price flexibility, but also influence over output, entry conditions, and the overall competitive environment.
Why Market Power Matters in Finance
Investors care about market power because it often helps explain profit durability. A company with real market power may be able to preserve margins, resist price competition, and keep returns on capital elevated for longer than a firm operating in a more commoditized market.
But market power is not always a simple positive. The same traits that support margins can increase regulatory risk, especially if a firm's behavior looks exclusionary or anti-competitive. That tension matters for valuation, litigation risk, and strategic outlook.
Why Regulators Care About Market Power
Competition authorities track market power because it can lead to higher prices, weaker output, or lower consumer welfare when firms face too little discipline from rivals. That does not mean every profitable firm is abusing market power. It means regulators look closely at whether concentration and entry barriers make competition meaningfully weaker.
This is why market power often appears in merger review, monopoly cases, and broader debates over market concentration.
The Bottom Line
Market power is the ability of a firm or group of firms to influence prices, output, or market terms beyond what would be possible in a highly competitive market. It helps explain margin durability, industry concentration, and why some markets attract more regulatory scrutiny than others.