Market Capitalization
The total market value of a company's outstanding shares—calculated by multiplying the share price by the number of shares out there.
Market cap is the quickest way to gauge how big a company is. The math is simple: Market Cap = Share Price x Total Shares Outstanding. A company with 1 billion shares trading at $150 has a market cap of $150 billion.
Companies are typically grouped by size: mega-cap ($200B+), large-cap ($10B-$200B), mid-cap ($2B-$10B), small-cap ($300M-$2B), and micro-cap (under $300M). These labels matter because they tend to correlate with risk, volatility, and expected returns.
Historically, small-cap stocks have delivered higher average returns than large-caps—a phenomenon known as the "small-cap premium"—but with significantly more volatility and risk. Mid-caps sit in between, offering more growth potential than large-caps with less risk than small-caps.
One important nuance: market cap measures what the market believes a company is worth, not what it actually earns or owns. A company can carry a $1 trillion market cap with modest profits (like many tech companies during growth phases) if investors expect massive future earnings.
In crypto, market cap works the same way—token price times circulating supply. But crypto market caps can be misleading due to low-liquidity tokens and tokens locked up in smart contracts that aren't actually tradeable.
Frequently Asked Questions
▸Why does market cap matter more than stock price?
Stock price on its own is meaningless without context. A $500 stock with 100 million shares ($50B market cap) represents a much larger company than a $5 stock with 500 million shares ($2.5B market cap). Market cap tells you the total value; stock price is just one piece of the equation.
▸Can a company's market cap exceed its revenue?
Absolutely—and many do. High-growth tech companies often trade at 10-50x revenue because investors are pricing in expected future growth. The price-to-sales ratio captures this relationship and varies dramatically by industry.
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