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Large cap, mid cap and small cap: what the categories mean
SEBI defines large cap as the top 100 companies by full market cap, mid cap as the 101st to 250th, and small cap as the 251st onward. The classification determines which category a mutual fund belongs to, and each bucket carries a distinct risk-return profile.
In one line
Per SEBI, large cap is the 1st to 100th company ranked by full market capitalisation, mid cap is the 101st to 250th, and small cap is the 251st company onward, with large caps offering the most liquidity and stability, mid caps a balance of growth and risk, and small caps the highest potential return alongside the highest volatility and liquidity risk.
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The SEBI definition and why it matters
SEBI mandates that mutual funds use the AMFI list, updated twice a year, to determine which stocks fall in each category. The list ranks all listed Indian companies by full market capitalisation. The top 100 are large caps, the next 150 are mid caps, and everything from the 251st company onward is a small cap. This rule is binding for how AMCs classify their funds and for the minimum exposure requirements of each category fund.
The classification matters to mutual fund investors because it determines what a fund must hold. A large-cap fund must invest at least 80% of its assets in large-cap stocks. A small-cap fund must invest at least 65% in small-cap stocks. When a company moves across the boundary because its market cap rank changes, funds are required to rebalance. A stock leaving the top 100 will eventually face selling pressure from large-cap funds that can no longer hold it.
Risk and return across the 3 buckets
Large-cap companies are the biggest, most established names on the Indian market. They tend to have wider analyst coverage, higher liquidity, and more stable earnings. In a market crash they often fall less than smaller stocks, and in a recovery they tend to recover first. The flip side is that their growth rate is more mature, so the potential for exceptional returns is lower than the other 2 buckets.
Mid caps sit between scale and growth. They have enough size to be reasonably liquid, but they are still in an expansion phase where a good year can move the stock substantially. Small caps carry the highest risk and the highest potential reward. They are less liquid, less covered by analysts, and more sensitive to business-specific shocks. In a strong bull market small caps often outperform, but in a bear market they can fall harder and stay down longer. The right mix across the 3 buckets depends entirely on your time horizon and appetite for volatility.
FAQ3 reader questions · AEO-eligible
Common questions on large, mid and small cap.
How does SEBI define large cap stocks?
SEBI defines large cap as the 1st to 100th company ranked by full market capitalisation on the AMFI list, which is updated twice a year. Mid cap is 101st to 250th and small cap is 251st onward.
Is it safer to invest in large cap funds?
Large-cap funds generally carry lower volatility than mid or small cap funds because the underlying companies are bigger and more established. They are not risk-free, but the drawdowns in a bear market are typically smaller.
Can a large-cap stock become a mid-cap?
Yes. If a company's market cap rank drops below 100 in the AMFI list update, it is reclassified as mid cap. Funds holding it as a large-cap stock are required to rebalance over time.
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