Market Capitalization

Market Capitalization (also called market cap) is the total market value of a company's outstanding shares of stock.

It is calculated by multiplying the current market price of one share by the total number of outstanding shares. It represents what the market believes a company is worth as a whole, and is the primary measure used to classify companies as large-cap, mid-cap, or small-cap. What is Market Capitalization? If a company has 500 crore shares outstanding and the current market price is ₹200 per share, its market capitalization is ₹1 lakh crore (₹100 trillion). This is the aggregate value that the stock market assigns to the company. Apple in the US has a market cap of approximately USD 3 trillion, making it the world's most valuable company. In India, Reliance Industries has a market cap of over ₹20 lakh crore (₹20 trillion or approximately USD 240 billion). Market cap is used to classify stocks into categories. In India, SEBI defines: Large-Cap (top 100 companies by market cap — most stable, least volatile), Mid-Cap (companies ranked 101 to 250 — moderate risk and growth), and Small-Cap (companies ranked 251 and below — highest risk, highest growth potential). Nifty 50 tracks the top 50 large-cap companies. Nifty Midcap 100 and Nifty Smallcap 100 track mid-cap and small-cap indices respectively. Market cap changes constantly as the share price changes. When a company's share price rises, its market cap rises. When new shares are issued (like in an FPO or rights issue), the total outstanding shares increase, which can dilute market cap if the price doesn't adjust proportionally. Share buybacks (where a company repurchases its own shares) reduce the outstanding shares and can increase the price per share. Market cap is a more meaningful measure than stock price alone. A stock priced at ₹10 per share with 1,000 crore outstanding shares has a market cap of ₹10,000 crore — larger than a stock priced at ₹500 per share with only 10 crore outstanding shares (₹5,000 crore market cap). Therefore, comparing stock prices between companies is meaningless — market cap is the proper measure of company size and value. For investors, market cap helps in portfolio construction and risk management. Large-cap stocks (like TCS, Infosys, HDFC Bank) are more stable but offer slower growth. Small-cap stocks can multiply in value during bull markets but can also fall 50% to 80% during bear markets. A balanced equity portfolio might have 60% in large-caps (stability), 30% in mid-caps (growth), and 10% in small-caps (high risk-reward) depending on the investor's age, income, and risk tolerance.