The ranking rule
Market capitalisation is the share price multiplied by the number of shares. SEBI uses rank, not a rupee cut-off. AMFI publishes a list of all listed companies, ranked by average full market capitalisation, twice a year, and funds have a window to rebalance after each release. So a company can move from mid cap to large cap, or the reverse, at each review.
What each fund type must hold
Under SEBI's category rules (reaffirmed in the February 2026 circular):
| Fund category | Minimum investment rule |
|---|---|
| Large cap | At least 80% in large caps |
| Large & mid cap | At least 35% in large caps and 35% in mid caps |
| Mid cap | At least 65% in mid caps |
| Small cap | At least 65% in small caps |
| Multi cap | At least 25% each in large, mid and small caps (75% total in equity) |
| [Flexi cap](/learn/glossary/flexi-cap-fund) | At least 65% in equity, with no cap-size limits |
How the three differ
- Large caps are established, widely held companies. They usually fall less in a bad market and are easier to trade, but offer less room to grow quickly.
- Mid caps are growing businesses. They have higher growth potential and bigger swings.
- Small caps are the smallest of the ranked group. They can grow fastest, but can fall hardest and are harder to sell in a panic.
None of this is a promise. Small caps can lag for years and large caps can lead.
How to use the categories
- Use large cap or an index fund for a stable core.
- Add mid and small caps for growth in a smaller share, sized by how much volatility you can bear.
- If you want one fund that decides for you, look at flexi cap.
- Remember that the riskometer will usually show higher levels as you go from large to small.
In August 2026 small-cap funds led equity inflows with ₹7,973 crore, and mid and small caps together took more than half of net flows into actively managed equity schemes, according to AMFI data. Flows follow recent returns; they are not a recommendation.
Questions people ask
What is large cap, mid cap and small cap?
Size groups of listed companies by market capitalisation rank.
Which is best?
There is no best. It depends on your horizon and tolerance. A mix, sized by your risk profile, is common.
How often does the list change?
Twice a year.
Are small-cap funds risky?
Yes, they are generally the most volatile equity category.
Keep going
Run the numbers
SIP calculator
A Systematic Investment Plan (SIP) invests a fixed amount every month into a mutual fund.
How we can help
Sources
- SEBI circular dated 26 February 2026 on categorisation and rationalisation
- AMFI half-yearly market-capitalisation list
- AMFI Monthly Note, August 2026.
Mutual Fund investments are subject to market risks. Read all scheme related documents carefully. This page is general education, not personal advice. Back to the full glossary