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How to Invest in SIP A Beginner's Guide
In summary
Large-cap, mid-cap, and small-cap categories tell you where a company ranks by full market capitalisation, SEBI classifies companies ranked 1st to 100th as large-cap, 101st to 250th as mid-cap, and 251st onwards as small-cap. Mutual fund categories then use minimum investment requirements linked to these groups. Keep these points in mind:
- Large caps rank among top 100
- Mid caps rank from 101 to 250
- Small caps start from rank 251
- Large-cap funds invest at least 80%
- Mid-cap funds invest at least 65%
- Small-cap funds invest at least 65%
Market capitalisation shows company size, not investment quality. You should also review the scheme's objective, portfolio, Riskometer, costs, and your investment horizon.
How does SEBI classify large-cap, mid-cap and small-cap companies?
SEBI uses full market-capitalisation rankings to classify listed companies into large-cap, mid-cap, and small-cap groups. The SEBI Master Circular for Mutual Funds dated 20 March 2026 retains the following classification:
| Company category | Market-capitalisation ranking |
| Large-cap | 1st to 100th company |
| Mid-cap | 101st to 250th company |
| Small-cap | 251st company onwards |
The classification is based on full market capitalisation, not a fixed amount such as Rs. 10,000 crore or Rs. 50,000 crore. This distinction is important because company market values change. A company can move from one category to another when its relative ranking changes. Therefore, you should not assume that the same company will permanently remain large-cap, mid-cap, or small-cap.
What is market capitalisation?
Market capitalisation is the total market value of a company's outstanding equity shares.
A simplified formula is:
Market capitalisation = Number of outstanding shares × Current market price per share
For example, suppose a company has 10 crore outstanding shares and each share trades at Rs. 500.
Market capitalisation = 10 crore × Rs. 500
Market capitalisation = Rs. 5,000 crore
This figure changes when the company's share price changes. Market capitalisation mainly tells you the company's size in the stock market. It does not directly tell you whether the shares are cheap or expensive, whether the company is profitable, or what return the shares will generate.
What are large-cap mutual funds?
Large-cap funds are equity mutual fund schemes that invest predominantly in large-cap companies.
Under SEBI's categorisation circular dated 26 February 2026, a large-cap fund must invest at least 80% of its total assets in equity and equity-related instruments of large-cap companies.
These companies fall within the top 100 by full market capitalisation. Large companies can have established businesses, wider operations, and greater trading liquidity than many smaller companies. However, this does not make large-cap funds risk-free. Their NAV can fall when equity markets decline or when companies in the portfolio perform poorly. When reviewing a large-cap fund, check its investment objective, portfolio concentration, current Riskometer, expense ratio, and performance across different market periods rather than relying only on the company-size label.
What are mid-cap mutual funds?
Mid-cap funds invest predominantly in companies ranked from 101st to 250th by full market capitalisation. Under SEBI's February 2026 framework, a mid-cap fund must invest at least 65% of its total assets in equity and equity-related instruments of mid-cap companies. Mid-sized companies can be at different stages of business development. Some may be expanding into new products, locations, or markets.
This can create growth opportunities, but company size also means mid-cap shares can experience substantial price movements.
A mid-cap fund can therefore fluctuate significantly during market corrections.
If you are comparing mid-cap funds with other equity categories, consider your risk tolerance, investment horizon, scheme portfolio, and Riskometer rather than assuming that mid-cap automatically means a specific level of return.
What are small-cap mutual funds?
Small-cap funds invest predominantly in companies ranked from 251st onwards by full market capitalisation.
SEBI requires a small-cap fund to invest at least 65% of its total assets in equity and equity-related instruments of small-cap companies.
Small companies can have room to expand their businesses, but they can also face challenges linked to business scale, access to capital, liquidity, or changing economic conditions.
Share prices in this segment can experience large movements. This means small-cap funds can also see substantial changes in NAV over shorter periods.
Higher growth potential should not be read as a promise of higher returns. Small-cap companies can underperform or lose value.
Review the scheme's portfolio, liquidity risks, Riskometer, costs, and investment objective before deciding whether the category matches your risk appetite.
How do large-cap, mid-cap and small-cap funds differ?
The key difference lies in company size, risk level, and growth potential. Large-cap funds invest mainly in bigger companies, while mid-cap and small-cap funds move progressively towards smaller companies that can experience greater price fluctuations.
| Factor | Large-cap funds | Mid-cap funds | Small-cap funds |
|---|---|---|---|
| SEBI rank | 1st–100th | 101st–250th | 251st onwards |
| Minimum allocation | 80% in large-cap stocks | 65% in mid-cap stocks | 65% in small-cap stocks |
| Company size | Larger companies | Mid-sized companies | Smaller companies |
| Risk | Equity-market risk remains | Can see sharper fluctuations | Can see substantial fluctuations |
| Volatility | Can fluctuate with markets | Generally more price-sensitive | Can be highly price-sensitive |
| Growth potential | Linked to established businesses | May benefit from business expansion | May benefit from faster expansion |
| Gains | Returns vary based on market conditions; past performance is not indicative of future returns | Returns vary based on market conditions; past performance is not indicative of future returns | Returns vary based on market conditions; past performance is not indicative of future returns |
| Recommended investment horizon | Long-term goals | Longer-term goals | Longer-term goals with higher risk capacity |
Past performance does not guarantee future returns. Compare the scheme’s Riskometer, portfolio, costs, and your investment horizon before choosing a category.
Does a smaller market cap always mean higher returns?
No. Smaller company size does not guarantee higher investment returns. Small-cap and mid-cap companies can grow faster than larger companies in some periods. However, they can also face greater uncertainty because of business concentration, financing needs, lower trading liquidity, or changing economic conditions.
Similarly, large-cap companies may have established operations, but they can still experience falling profits, weak growth, or sharp share-price declines. Market capitalisation should therefore be treated as one classification factor.
You can combine it with information such as:
- Company's financial position
- Portfolio diversification
- Investment objective
- Current Riskometer
- Expense ratio
- Investment horizon
- Your financial objective
Past performance should also not be treated as a guarantee of future returns.
How should you choose between these fund categories?
Start with your financial goal and the amount of market fluctuation you can tolerate. Instead of asking which category is “best”, compare what each category adds to your portfolio.
For example, you can consider:
- When you will need the money
- How you react to market declines
- Whether the goal date can change
- Existing equity exposure in your portfolio
- Scheme-specific Riskometer level
- Portfolio concentration and holdings
- Expense ratio and other scheme conditions
Your financial objectives and risk capacity matter more than a generic allocation rule.
Can you invest across all three market-cap segments?
Yes. An investor can have exposure to more than one market-cap segment, either through separate schemes or through categories that invest across different company sizes. However, simply owning several funds does not automatically create effective diversification. Two funds can hold some of the same companies or have similar portfolio exposure.
Before adding another scheme, check:
- Existing market-cap allocation
- Portfolio overlap
- Investment objective
- Number of schemes already held
- Risk contribution of each scheme
Avoid using a fixed allocation such as 50% large-cap, 30% mid-cap, and 20% small-cap without considering your own circumstances. There is no universal market-cap allocation that suits every investor.
Conclusion
Large-cap, mid-cap, and small-cap categories classify companies according to their full market-capitalisation ranking. SEBI currently places companies ranked 1st–100th in large-cap, 101st–250th in mid-cap, and 251st onwards in small-cap.
Mutual fund categories must maintain specified minimum exposure to these groups. When choosing between them, do not rely only on company size or past returns. Consider the scheme's portfolio, Riskometer, costs, investment horizon, financial goals, and ability to manage equity-market fluctuations.
Last reviewed: October, 2026
Mutual funds are subject to market risk. Please read the scheme-related documents carefully before investing.
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How are large-cap, mid-cap and small-cap funds in India categorised?
SEBI classifies companies according to full market capitalisation. Companies ranked 1st to 100th are large-cap, 101st to 250th are mid-cap, and 251st onwards are small-cap. Mutual fund categories then have minimum investment requirements. Large-cap funds must invest at least 80% in large-cap companies, while mid-cap and small-cap funds must invest at least 65% in their respective market-cap segments.
What is the difference between large-cap and mid-cap funds?
The main difference is the size of companies in which they predominantly invest. Large-cap funds invest at least 80% in companies ranked 1st to 100th by full market capitalisation. Mid-cap funds invest at least 65% in companies ranked 101st to 250th. Both are equity funds and can experience market losses. Compare their portfolios and Riskometer rather than assuming either category has a fixed level of risk or return.
Are mid-cap stocks riskier than large-cap stocks?
Mid-cap shares can experience greater price fluctuations than many larger companies, but company size alone does not determine investment risk. Financial strength, valuation, debt, business conditions, liquidity, and market sentiment also matter. If you invest through a mid-cap mutual fund, check its current Riskometer and portfolio. Large-cap shares can also fall sharply, so neither category should be treated as free from equity-market risk.
How can you assess the risk of investing in mid-cap stocks?
You can review the company's financial position, debt, profitability, cash flows, business model, valuation, and share-trading liquidity. If you are investing through a mid-cap mutual fund, also check the scheme's Riskometer, portfolio concentration, expense ratio, and investment objective. Avoid assessing risk only from recent returns because a strong past performance period does not show how the investment will behave in future market conditions.
How do large-cap, mid-cap and small-cap mutual funds differ in risk and return potential?
They mainly differ in the company-size segment to which they provide exposure. Large-cap funds focus on larger companies, while mid-cap and small-cap funds invest more heavily in progressively smaller companies. Smaller-company shares can experience substantial fluctuations and business uncertainty, but this does not guarantee higher returns. Your actual return depends on the portfolio, market conditions, investment period, costs, and the performance of underlying companies.
Disclaimer
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In addition to displaying the Mutual fund products of Asset Management Companies, some general information is sourced from third parties, is also displayed on As-is basis, which should NOT be construed as any solicitation or attempt to effect transactions in securities or the rendering any investment advice. Mutual Funds are subject to market risks, including loss of principal amount and Investor should read all Scheme/Offer related documents carefully. The NAV of units issued under the Schemes of mutual funds can go up or down depending on the factors and forces affecting capital markets and may also be affected by changes in the general level of interest rates. The NAV of the units issued under the scheme may be affected, inter-alia by changes in the interest rates, trading volumes, settlement periods, transfer procedures and performance of individual securities forming part of the Mutual Fund. The NAV will inter-alia be exposed to Price/Interest Rate Risk and Credit Risk. Past performance of any scheme of the Mutual fund do not indicate the future performance of the Schemes of the Mutual Fund. BFL shall not be responsible or liable for any loss or shortfall incurred by the investors. There may be other/better alternatives to the investment avenues displayed by BFL. Hence, the final investment decision shall at all times exclusively remain with the investor alone and BFL shall not be liable or responsible for any consequences thereof.
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Disclaimer on Risk-O-Meter:
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The information BFL contained in this article is for general informational purposes only and does not constitute any financial advice. The content herein has been prepared by BFL on the basis of publicly available information, internal sources and other third-party sources believed to be reliable. However, BFL cannot guarantee the accuracy of such information, assure its completeness, or warrant such information will not be changed.
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Disclaimer
Mutual Fund SIP calculator may provide potential investors an approximate estimate on the maturity amount of the monthly SIP, purely based on mathematical calculation of the projected annual return rate selected by investor. However, such calculation does not factor the actual performance by the Asset Management Company (AMC) and should not be treated as any advice or assurance about the actual return of investment. Mutual Funds do not have a fixed rate of return and it is not possible to predict the rate of return. Please note that the SIP calculator are for illustrations only and do not represent actual returns which may vary depending on various factors including but not limited to actual performance, expense ratio, taxation, exit load (if any), etc.