Market Cap (Market Capitalization)

The total market value of a company's outstanding shares.

What Is Market Capitalization?

Market capitalization (market cap) is the total dollar value of all of a company's outstanding shares. It's calculated by multiplying the current stock price by the total number of shares.

Market Cap = Stock Price × Shares Outstanding

For example, if a company has 1 billion shares outstanding and the stock trades at $150, its market cap is $150 billion.

Market Cap Categories

• Mega-cap: $200B+ (Apple, Microsoft, NVIDIA). The largest companies in the world.
• Large-cap: $10B-$200B. Established companies with proven business models.
• Mid-cap: $2B-$10B. Growing companies with established products.
• Small-cap: $300M-$2B. Smaller companies with higher growth potential but more risk.
• Micro-cap: Under $300M. Very small companies, often thinly traded.

Why Market Cap Matters

Market cap determines a stock's inclusion in major indexes (like the S&P 500), affects institutional investment eligibility, and correlates with risk and volatility. Larger companies tend to be more stable but grow slower; smaller companies can grow faster but carry more risk.

During earnings season on EarningsShot, you'll notice that mega-cap earnings (Apple, Amazon, Google) tend to move the entire market, while small-cap earnings mainly affect individual stocks.