Market Cap: Large, Mid & Small Cap
Market capitalization tells you how big a company is in the eyes of the market. Size shapes how a stock behaves, how risky it is and how much it can grow.
How market cap is calculated
Market cap = share price × total shares outstanding.
A company with 100 million shares trading at 50 has a market cap of 5 billion. Market cap reflects what investors think the whole company is worth today, not what it owns on paper.
Why it matters
- Compares companies of different share prices fairly
- Indicates stability and liquidity
- Many index funds and ETFs are built by market cap
- Helps you balance risk across a portfolio
Large vs mid vs small cap
| Large cap | Mid cap | Small cap | |
|---|---|---|---|
| Company profile | Established market leaders | Growing, established businesses | Young or niche companies |
| Volatility | Lower | Medium | Higher |
| Growth potential | Steady | Higher | Highest, but uneven |
| Liquidity | Very high | Good | Can be thin |
| Dividends | Common | Sometimes | Rare |
| Role in a portfolio | Stable core | Growth engine | Small, high-risk satellite |
How size categories are defined
Exact cut-offs differ by country and index provider. In the US, large caps are generally the biggest few hundred listed companies. In India, SEBI classifies the top 100 companies by market cap as large cap, the next 150 as mid cap, and the rest as small cap.
Building a mix
- Beginners often keep most of the portfolio in large caps or a broad index fund.
- Add mid and small caps gradually for extra growth, sized so a big fall won't derail you.
- Small caps can fall much further in bear markets, so give them a long time horizon.
Educational information only, not investment advice. Market data may be delayed.
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