Market capitalization
What is market capitalization?
Market capitalization is share price multiplied by shares outstanding — the market's current price for the entire company. It measures size and market sentiment, not quality, safety or how much cash a company actually has.
Market capitalization = Share price × Shares outstanding
- Written by
- Suggested Investments Research Team
- Content type
- Reference definition
- Published
- 2026-09-13
- Last reviewed
- 2026-09-13
Price alone tells you nothing about size
A $500 stock with 10 million shares is a $5 billion company. A $20 stock with 5 billion shares is a $100 billion company. Ranking companies by share price rather than market cap is a common and easy mistake.
Market cap is not the same as company value
It ignores debt and cash sitting on the balance sheet, and it can move sharply on sentiment with no change to the underlying business. Two companies with identical market caps can have very different debt loads, which changes what that price actually represents.
A worked example
A company with 2 billion shares outstanding trading at $45 has a market cap of $90 billion. If the price falls to $30 with no change in share count, the market cap falls to $60 billion even though nothing about the business necessarily changed.
The mistake people make
Assuming a lower share price means a cheaper or smaller company. Share count varies enormously between companies and says nothing about value on its own.
How we use it
Market cap does not directly score a company, but it sets the peer group a company is measured against across our research lenses, so a small company is never benchmarked against mega-cap norms.
Related terms
Sources and methodology
- EDGAR full-text and structured filing data — U.S. Securities and Exchange CommissionPrimary source
- Intelligent Accumulation methodology — Suggested InvestmentsPrimary source
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Educational information only. Nothing here is a recommendation to buy or sell any investment, and no research measurement removes the risk of loss.