Market capitalisation is the market's total price tag on a company: share price × number of shares outstanding. A company trading at ₹500 with 20 crore shares is worth ₹10,000 crore — whatever its factories, brands or revenues might suggest. It is the single number the entire large/mid/small-cap vocabulary is built on.
The official SEBI buckets
For mutual funds, SEBI fixed the definitions by rank, not rupees: the top 100 companies by full market cap are large-cap, ranks 101–250 are mid-cap, and everything from 251 down is small-cap. As companies grow and shrink, they migrate between buckets — the lines are redrawn every six months by AMFI.
What each bucket feels like
Large caps are the giants — banks, IT majors, energy. Deep revenues, wide analyst coverage, and the smallest daily swings; their indexes anchor most portfolios. Mid caps are established challengers with room to grow — and to stumble. Small caps are the frontier: local champions and young firms whose prices can double or halve on sentiment alone.
| Bucket | Typical volatility | Realistic horizon |
|---|---|---|
| Large cap | Lowest of the three | 3–5+ yrs |
| Mid cap | Higher | 5–7+ yrs |
| Small cap | Highest | 7–10+ yrs |
Tendencies, not guarantees — a small-cap fund in a crash can fall further and recover slower than the large-cap index.
Reading fund labels
A “large-cap fund” must invest at least 80% of its assets in the top-100 bucket; mid and small-cap funds follow their own floors. Flexi-cap funds roam freely. When a fund's label says “multi-cap” or “large & mid”, the label is a rule about where it may invest — volatility and returns still follow the buckets it holds.
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Message IFI on WhatsApp →Quick recap
- Market cap = share price × shares outstanding — the company's price tag.
- SEBI buckets are ranks: top 100 large, 101–250 mid, 251+ small.
- Higher bucket = typically higher volatility and longer required horizon.
- Fund labels are rules about where money may go, not promises of returns.
Frequently asked questions
What is market cap in simple words?
Market capitalisation is the total market value of a company's shares - price per share multiplied by number of shares outstanding. It is the market's current price tag on the whole business.
Is mid-cap safer than small-cap?
Generally, yes - mid-caps are larger, more established and usually less volatile than small-caps. But both fall harder than large caps in a downturn; they differ in degree, not in kind.
What are multi-cap and flexi-cap funds?
Funds allowed to invest across size buckets. Multi-cap funds must hold minimum proportions in each; flexi-cap funds choose freely based on the manager's view. The label sets the boundaries, not the returns.
Do companies move between buckets?
Yes - every six months AMFI re-ranks all listed companies by market cap, and companies are promoted or demoted between large, mid and small-cap.