Photo: Markus Winkler / Pexels
Mutual Fund Overlap: Why Your 5 Funds Are Really One
You did everything the internet told you to do. You picked a top-rated large-cap fund, added a 'bluechip' fund for safety, threw in a flexi-cap because it sounded flexible, and topped it off with two more schemes a colleague swore by. Five funds, five SIPs, five separate statements. It feels diversified. It probably isn't.
This is the quiet trap of mutual fund portfolio overlap — the situation where several funds you own hold the same underlying stocks in similar proportions. On paper you have a basket of five products. In reality you may own one slightly expensive, slightly confusing fund wearing five different name tags. Here is how the overlap happens, how to measure it, and how to clean it up.
What 'overlap' actually means
A mutual fund is just a bundle of stocks (or bonds). Two funds 'overlap' to the extent they hold the same securities by weight. If Fund A puts 8% in a large private bank and Fund B also puts 8% there, that 8% is common ground. Add up all such common positions and you get an overlap percentage.
An overlap of 20-30% between two funds is normal and harmless — India's investable universe isn't infinite, so popular stocks turn up everywhere. But when two funds overlap 60%, 70% or more, you are no longer diversifying. You are buying the same portfolio twice and paying two sets of fees to do it.
The danger is psychological as much as financial. You feel spread out across many funds, so you take comfort and maybe even take more risk. But if those funds crash together — because they hold the same names — your 'diversification' was an illusion exactly when you needed it most.
Why your funds secretly own the same stocks
The overlap isn't a conspiracy. It's baked into how the industry is structured.
In 2017, SEBI forced every fund house to slot its equity schemes into clearly defined boxes — large-cap, mid-cap, small-cap, flexi-cap, and so on — and to run only one scheme per category. To police this, AMFI publishes a list, refreshed twice a year, ranking listed companies by market value:
- Large-cap: the top 100 companies by market capitalisation
- Mid-cap: ranks 101 to 250
- Small-cap: rank 251 and below
A large-cap fund, by rule, must keep at least 80% of its money in those same top 100 names. So if you own three large-cap-leaning funds, all three are fishing in the identical 100-stock pond. They cannot be very different — the rules don't allow it. That's why two large-cap funds routinely overlap 60-85%, and why a 'bluechip' fund and a 'large-cap' fund are usually near-twins.
Flexi-cap and large-and-mid-cap funds add to the pile, because their hefty large-cap chunks pull from the same well. Stack a few of these and the duplication compounds.
How to actually measure it
The good news: this is checkable in minutes, because the data is public by law. Every mutual fund must disclose its full portfolio every month, typically by the 10th of the following month, on its own website and via AMFI. Half-yearly disclosures go even deeper.
You don't have to read spreadsheets, though. Free research platforms have built portfolio overlap tools that do the math for you:
- Pick the Compare or Portfolio Overlap feature on a site like Value Research or Morningstar India.
- Select any two of your schemes.
- Read the single overlap % it spits out, plus the list of shared stocks.
Do this for each pair in your portfolio. A practical rule of thumb:
- Under ~30%: fine, genuinely different funds.
- 30-50%: keep an eye on it; some redundancy.
- Over ~50%: a red flag — strong case to drop one of the two.
If you use a portfolio tracker or your broker's app, many now show a consolidated 'top holdings' view across all your funds. If a single stock quietly makes up 9-10% of your entire equity wealth because four funds all love it, that view will expose it instantly.
The hidden costs of a bloated fund list
Overlap isn't just untidy. It costs you in three concrete ways.
First, fees. Every fund charges an annual expense ratio. Owning five funds that behave like one means paying four extra expense ratios for zero extra benefit. Over decades, that drag compounds against you.
Second, false safety. Investors with many funds often believe they've hedged their bets. But concentration risk doesn't care how many statements you receive. If your funds collectively bet big on the same five stocks, one bad sector cycle hits everything at once.
Third, sheer admin. More funds mean more statements, more capital gains calculations at tax time, more rebalancing decisions, and more chances to make a mistake. Complexity is a cost even when it isn't a fee.
How to de-dupe your portfolio
Cleaning up is straightforward once you can see the overlap. A simple approach:
- Map your funds by category — large, mid, small, flexi, index, debt, hybrid. If you have three funds in one box, that's your first suspect.
- Run overlap checks on every pair within the same broad style. Twins will be obvious.
- Keep the better twin — the one with the lower expense ratio, more consistent long-term record, or a manager you trust — and stop the SIP in the duplicate.
- Cover gaps, not duplicates. If everything you own is large-cap-heavy, you don't need a sixth large-cap fund; you need a mid/small-cap, an index fund, or a debt allocation.
- Exit slowly and tax-smartly. Don't dump a redundant fund in one shot. Stopping fresh SIPs, then redeeming in tranches across financial years, helps you manage capital gains tax and exit loads.
A tidy portfolio for most Indian investors rarely needs more than 3 to 5 funds that genuinely differ — by market cap, by investing style (value vs growth), or by asset class. That's real diversification. Twelve overlapping schemes is just clutter that feels like effort.
The bigger lesson for SIP investors
The instinct to keep adding funds usually comes from a good place — wanting to be careful, not putting all your eggs in one basket. But diversification is about owning different things, not owning many things. Five funds full of the same stocks is one egg in five baskets that are all stacked on the same table.
Before you start that next SIP because an app pushed a five-star rating at you, run the overlap check first. If the new fund duplicates 60% of what you already hold, you're not diversifying — you're paying extra to stand still. The most valuable move many investors can make this year isn't buying another fund. It's having the discipline to subtract.
