Market Capitalization
Market capitalization (market cap) is the total market value of a company's outstanding shares, calculated as the share price multiplied by the total number of shares outstanding.
Understanding Market Capitalization
Market cap reflects the market's collective view of a company's worth at any moment. It changes throughout trading hours as the share price moves. Indian companies with the highest market caps anchor the Nifty 50 and Sensex; smaller market caps populate Nifty Mid Cap 150 and Smallcap 250.
SEBI's market cap classification, updated semi-annually, determines which mutual funds can hold which stocks. A Large Cap fund must hold at least 80% in stocks ranked top 100 by market cap; a Mid Cap fund must hold at least 65% in stocks ranked 101-250; a Small Cap fund must hold at least 65% in stocks ranked below 250.
Why it matters
Market cap is the primary lens for categorising stocks (Large/Mid/Small Cap) and choosing mutual funds. Generally: Large Cap stocks are more stable but slower-growing; Small Cap stocks are higher-risk, higher-return potential. For a balanced portfolio, allocation across market caps (typically 60/30/10 split for moderate risk) provides diversification within Indian equity.
Example
Reliance Industries has approximately 676 crore shares outstanding (as of 2026). At a share price of ₹2,800, its market cap = 676 crore × ₹2,800 = ₹18.9 lakh crore. This makes Reliance one of the largest companies in India by market cap, included in Nifty 50 and Sensex.
Reliance Industries has approximately 676 crore shares outstanding (as of 2026). At a share price of ₹2,800, its market cap = 676 crore × ₹2,800 = ₹18.9 lakh crore. This makes Reliance one of the largest companies in India by market cap, included in Nifty 50 and Sensex.