Many investors hold six, eight or even a dozen mutual funds, believing more funds means more diversification. Often the opposite is true: the funds own largely the same companies, and the extra funds add complexity without adding much variety.
This article explains mutual fund overlap, why it happens, how to check it, how much is too much, and how to simplify sensibly.
What overlap is and why it happens
Overlap is the extent to which two or more funds hold the same securities. If two large-cap funds each have their biggest positions in the same banks, technology companies and consumer firms, owning both is close to owning one fund twice.
It happens for understandable reasons.
The investable universe is limited. Large-cap funds must invest mainly in the largest listed companies, and there are only so many. Most will hold many of the same names.
Benchmarks pull funds together. Active funds are measured against an index, and many hold the index's largest constituents to avoid falling far behind it.
Funds are bought at different times for different reasons — a recommendation here, an NFO there, a tax-saving fund in March — without anyone looking at the combined result.
Category labels mislead. A flexi-cap fund, a large-and-mid-cap fund and a focused fund can all end up holding many of the same large companies.
Why it matters
Less diversification than it appears. Holding eight funds that overlap heavily gives much less spread than eight genuinely different funds. Concentration in a few large companies or sectors can be higher than you realise.
Paying for duplication. Each active fund charges its own expense ratio. Paying several managers to hold largely the same stocks is an expensive way to approximate an index fund.
Average results. Many overlapping active funds together tend to behave like the market, minus the combined costs.
Complexity. More funds mean more statements to track, more decisions at review time, and more confusion about what you actually own.
Overlap is not always bad. Some is unavoidable, and a deliberate core-and-satellite structure may accept it. The problem is unplanned overlap that nobody has measured.
A worked example: from seven funds to four
Consider an investor who, over six years, has collected seven equity funds: three large-cap funds, a flexi-cap fund, a large-and-mid-cap fund, a focused fund bought during an NFO, and a mid-cap fund. Monthly investments go into five of them.
Putting the factsheets side by side shows the pattern. The three large-cap funds share most of their top ten names. The flexi-cap and focused funds hold many of the same banks and technology companies. Added together, the same eight companies make up a large share of all the equity the investor owns, across six funds.
The investor asks of each fund what job it does. The answers: one large-cap exposure, one mid-cap exposure, and a wish for some flexibility. The simplified structure becomes a broad index fund as the core, the existing mid-cap fund, one flexi-cap fund with a reasonable record, and a debt fund that was already held separately.
Monthly investments are redirected immediately. The redundant funds are sold gradually over two financial years, starting with units past their exit-load period and with the smallest gains. Nothing about the investor's overall exposure changes much; what changes is that each fund now does something the others do not, and the total expense paid falls.
How to check it
Read the factsheets. Each fund publishes its top holdings and sector allocation monthly. Put the top ten or twenty holdings of each fund side by side. Repeated names and similar sector weights show the overlap quickly.
Use an overlap comparison tool. Several free online tools compare the holdings of two funds and show the percentage of common holdings by weight.
Look at the combined picture. Add up your exposure to your largest individual holdings across all funds. If a few companies make up a large share of your total equity, the funds are less diversified than their number suggests.
Compare with the index. If your combined holdings look very similar to a broad index, a low-cost index fund might give much the same exposure for less.
A worked illustration: an investor holds three large-cap funds. Their top ten holdings share seven names. Combined, the investor effectively holds one large-cap basket three times, paying three expense ratios for it.
How much is too much, and how many funds is enough
There is no exact threshold, but some practical guidance:
Two funds in the same category usually overlap heavily. Unless there is a specific reason, one is often enough.
When two funds share most of their top holdings by weight, one of them is probably redundant.
Different categories overlap less, though not always as little as expected. A large-cap fund and a mid-cap fund usually differ more than two large-cap funds.
A small number of funds is often enough. Many investors are well served by a structure such as a broad index fund as the core, perhaps one fund covering mid or small companies for growth, an international fund if desired, and a debt fund for stability. That is three or four funds, each doing a distinct job.
The test for each fund: what does it do that the others do not? If there is no clear answer, it is a candidate for consolidation.
Consolidating sensibly
Selling funds to simplify has costs, so do it deliberately.
Stop new money first. The cheapest step is to stop monthly investments into redundant funds and direct them to the funds you are keeping. Over time, the overlap shrinks without selling anything.
Check exit loads. Units held for less than a specified period may attract an exit load. Waiting until that period passes can avoid it.
Consider tax. Selling units can create capital gains tax. Spreading sales across financial years, or selling units with smaller gains first, can reduce the impact. Check the current rules.
Watch lock-ins. Tax-saving funds have lock-in periods on each instalment; those units can only be sold after the lock-in ends.
Keep records. Note why each remaining fund is held, so future additions are judged against a clear structure rather than added on impulse.
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Exit loads, lock-ins and taxation are set by fund houses, SEBI and tax law and change from time to time; check current terms before selling. This is educational material, not advice, and no fund is recommended. We run no tips group and no signal service, we manage nobody's money, and no return is promised.
Disclosure: the account-opening link on this page is under Atul Shrivastava's Zerodha Authorised Person registration (NSE AP Reg: AP2516003481; Zerodha Broking Ltd. SEBI Reg: INZ000031633) and earns a revenue share. TheFinBaba is not a SEBI-registered Investment Adviser — this content is educational, not investment advice.
Frequently Asked Questions
What is mutual fund overlap?
The extent to which different funds hold the same securities. High overlap means owning several funds gives less diversification than it appears.
How do I check overlap between my funds?
Compare top holdings and sector weights from each fund's monthly factsheet, or use a free online overlap tool that shows common holdings by weight.
How many mutual funds should I hold?
Often three or four, each with a distinct job, such as a broad index fund core, a mid or small company fund, an international fund and a debt fund.
Is overlap always bad?
No. Some overlap is unavoidable, and a deliberate core-and-satellite structure may accept it. The problem is unplanned, unmeasured overlap and paying several fees for the same holdings.
How should I reduce overlap?
Stop new investments into redundant funds first, then sell gradually while watching exit loads, tax on gains and any lock-in periods.
Related Reading
- Why new funds often add little
- Diversification, measured properly
- Lock-ins on tax-saving funds
- A structure with distinct parts
- The yearly review routine
- Tax when switching funds
Disclaimer: TheFinBaba provides educational content only - this is not investment advice. Trading involves risk of loss.
