The short answer: There is no single number of funds that is right, and more funds do not mean more diversification. We read the full 30 September 2026 portfolios of seven equity funds from four large fund houses. The three large-cap funds hold 163 positions between them but only 109 distinct stocks, and 13 stocks sit in all three. The median pair of large-cap funds overlaps by 49.5%: about half of what one owns, the other owns too. So when you ask “how many mutual funds should I have”, the better question is what each one adds that the others do not.
Investor note, October 2026. Written and reviewed by the Krishna Vriddhi Capital research desk. Updated 21 October 2026. 5 minute read.
| Item | Detail |
|---|---|
| Data | The fund houses’ own monthly portfolio disclosures as on 30 September 2026, downloaded 21 October 2026 |
| Funds | Three large-cap and four flexi-cap equity funds from four fund houses; names withheld, shown as House 1 to 4 |
| Method | Overlap of two funds is the sum, over every stock both hold, of the smaller of the two weights, matched by ISIN |
Key takeaways
- How many mutual funds should I have? Start with overlap, not a count. Mutual fund overlap is high inside one category: the median large-cap pair overlaps by 49.5%, and pairs from the same fund house run higher than most pairs from different houses.
- Flexi-cap funds roam further and overlap less: a median of 28.2% across six pairs, from 19.0% to 44.8%. A large-cap and a flexi-cap fund can still share up to 54.6% of their weight.
- None of this makes any of these funds a poor fund. It makes a collection of them less diversified than it feels.
What is overlap in a mutual fund, in plain words?
A mutual fund pools many investors’ money and buys shares of companies. Overlap is how much of two funds’ money sits in the same shares. If two funds overlap by 50%, half of each fund’s money is in shares the other also holds. Owning both then gives you less variety than two separate names suggest, because a fall in those shared shares hurts both.
How many mutual funds should I have? What the overlap shows
| Measure | Large-cap funds | Flexi-cap funds |
|---|---|---|
| Funds read | 3 | 4 |
| Positions between them | 163 | not summed |
| Distinct stocks | 109 | not summed |
| Stocks held by all funds in the group | 13 | not shown |
| Median pairwise overlap | 49.5% | 28.2% |
| Range of pairwise overlap | 47.7% to 52.0% | 19.0% to 44.8% |
The 13 stocks held by all three large-cap funds carry between 41% and 55% of each fund’s money. An investor holding all three owns one concentrated portfolio under three account statements. This note does not set a number of funds. It shows that adding a third large-cap fund to two large-cap funds added 163 positions on paper but only 109 distinct stocks in practice.
How much portfolio overlap is acceptable in a mutual fund?
There is no official limit. Two funds with the same mandate, such as large-cap, will naturally own many of the same large companies, so a high overlap is expected there. It matters when you hold several funds believing each adds something different. In this sample the lowest overlap was 19.0%, between two flexi-cap funds from different houses, and the highest was 54.6%, between a large-cap and a flexi-cap fund. Mutual fund diversification comes from different mandates and holdings, not from a higher count.
What this mutual fund overlap analysis cannot see
Only Indian equity ISINs are matched. One flexi-cap fund holds foreign shares and cash-like instruments worth 26.5% of its assets, which this method cannot match, so its overlaps are understated by roughly that share. Overlap changes every month as funds trade, and this is one month’s snapshot.
The useful question before adding the next fund is not whether it is a good fund. It is what it owns that you do not already own three times.
So how many mutual funds should I have? On this evidence, the count matters less than whether each fund adds something different.
A snapshot of disclosed portfolios, not a view on any fund or stock, and not a recommendation to buy, hold or sell.
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Questions people ask
How many mutual funds should I have?
This note does not give a number, and no number is right for everyone. It shows that in the sample, three large-cap funds held only 109 distinct stocks across 163 positions. Before adding a fund, check what it owns that you do not already own.
What is overlap in mutual fund portfolios?
It is the share of the stocks, by weight, that two funds both hold. If two funds overlap by 50%, half of each fund’s money sits in the same shares as the other’s.
Is mutual fund overlap always a problem?
Not always. Two funds with the same mandate will naturally own many of the same large companies. It matters when you hold several funds believing each adds something different.
How many mutual funds should I have to be diversified?
There is no set number. In the sample, funds in the same category overlapped heavily, so more funds in one category added little variety. Funds with different mandates overlapped less. Mutual fund diversification depends on what the funds own, not how many there are.
How much portfolio overlap is acceptable?
There is no official limit. In this sample the median overlap was 49.5% between large-cap funds and 28.2% between flexi-cap funds.
How is overlap measured in this note?
For each pair, we add up the smaller of the two weights for every stock both funds hold, matched by ISIN, as a percentage of net assets.
Which funds does the note cover?
Seven equity funds from four large fund houses, read from their public monthly portfolio disclosures for September 2026. Names are withheld; the note is about structure, not brands.
Sources
Monthly portfolio disclosures as on 30 September 2026 published by the four fund houses on their own websites, downloaded 21 October 2026. Disclosure rules: SEBI; fund data: AMFI. Calculations by the Krishna Vriddhi Capital research desk.
Investor education only. Mutual fund investments are subject to market risks. Not investment advice or a recommendation of any scheme. More notes are in the research library.