Market Capitalization
What is Market Capitalization?
Market capitalization is the total value of a company's shares, found by multiplying the share price by the number of shares outstanding.
It is the market's estimate of a company's equity value and is used to classify firms as large-, mid-, or small-cap. It changes constantly as the share price moves.
Market Capitalization: a worked example
Kettle and Crumb Bakeries has 40 million shares trading at $18, so its market cap is 40,000,000 × $18 = $720,000,000. Northwind Foods trades at $180 a share, ten times the price, but has only 2 million shares: 2,000,000 × $180 = $360,000,000, exactly half of Kettle and Crumb. Now Kettle and Crumb runs a two for one split. Holders end up with 80 million shares and the price adjusts to $9. Market cap is 80,000,000 × $9 = $720,000,000, unchanged, because a split slices the same pie differently rather than adding value.
The mistake students make with market capitalization
Students routinely rank companies by share price, treating a $180 stock as a bigger business than an $18 stock. Price alone says nothing about size, because it depends on how many shares the company chose to create. The error is tempting because the price is quoted everywhere while the share count sits buried in the filings. Two firms with prices of $9 and $900 can be exactly the same size, and only multiplying each price by shares outstanding reveals that.
Market Capitalization questions
Does a higher share price mean a company is worth more?
Share price by itself does not measure company size, because the number of shares outstanding is a choice the company makes. A firm with 2 million shares at $180 is worth $360 million, while one with 40 million shares at $18 is worth $720 million. Comparing the two requires multiplying price by share count. A stock split changes the price without changing what the company is worth.
What is the difference between market cap and enterprise value?
Market capitalization values only the equity, while enterprise value adds debt and subtracts cash to estimate what the whole business costs to acquire. A company with a $720 million market cap, $200 million of debt and $50 million of cash has an enterprise value of 720 plus 200 minus 50, or $870 million. That gap matters when a debt heavy firm is compared with a debt free rival, since the equity price hides the borrowing.
Does issuing new shares change a company's market cap?
Issuing new shares raises market capitalization by roughly the cash the company collects, while shrinking each existing owner's percentage of the firm. Selling 10 million new shares at $18 brings in $180 million and lifts the count from 40 million to 50 million, so the cap moves from $720 million toward $900 million. Existing holders then own 80% of a larger company instead of 100% of a smaller one.
Formula / Example
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