Investors often hold several mutual fund schemes to diversify their investments, but owning more funds does not necessarily reduce portfolio concentration. Different schemes may invest in the same companies, hold securities from similar sectors or carry comparable risks. Without examining these overlaps, investors may end up with a portfolio that looks diversified but isn’t.
This is especially relevant for multi-asset allocation mutual funds. These schemes invest across asset classes such as equity, debt and commodities, including gold and silver through exchange-traded funds, subject to their investment mandates. Some schemes may also permit exposure to instruments such as infrastructure investment trusts (InvITs).
Although a multi-asset structure can help spread investments across different categories, its contribution to diversification depends on the underlying holdings and the investor’s existing portfolio. Before adding a scheme, investors should examine common securities, asset allocation, sector concentration and the risks associated with each investment.
Why Should Investors Check Portfolio Overlap Before Adding Another Fund?
Portfolio overlap occurs when two or more mutual funds hold the same securities or provide exposure to similar underlying investments. It is commonly assessed by comparing equity holdings, but similar concentration can occur across debt securities, issuers and asset classes.
For example, an investor may hold a large-cap fund, a flexi-cap fund and an index fund. Despite their different investment approaches, these schemes may allocate substantial portions of their portfolios to the same large companies.
This does not automatically make the portfolio unsuitable. Common holdings can be reasonable when they reflect the investor’s intended exposure. However, repeated investments in the same companies or sectors can increase concentration beyond the intended level.
A multi asset allocation fund can add debt and commodity exposure alongside equity investments. Nevertheless, its equity component may overlap with existing funds. Investors should therefore evaluate how the proposed scheme changes the combined portfolio instead of assuming that a new fund category guarantees better diversification.
Which Holdings Should Investors Compare Across Mutual Funds?
First, examine the latest portfolio disclosures of existing schemes and the proposed investment. Comparing their underlying holdings helps investors identify concentrations that may not be apparent from scheme names or categories.
Common equity holdings: Identify companies appearing across multiple schemes and compare their portfolio weights. A stock representing a substantial share of several funds deserves closer attention than one with a negligible allocation.
Sector concentration: Compare exposure to banking, information technology, healthcare, energy and other major sectors. Two funds may hold different companies but still face similar economic conditions.
Debt issuer exposure: Check whether different debt securities are issued by the same company or related business groups. Holding several bonds does not necessarily provide meaningful diversification if repayment depends on the same issuer.
Credit quality and maturity: Examine credit ratings, maturity profiles and interest rate sensitivity. Debt instruments with similar characteristics may respond similarly to changes in interest rates or credit conditions.
Commodity exposure: Determine whether the proposed scheme invests in gold ETFs, silver ETFs or other permitted instruments. Different commodities can have distinct risk and return characteristics, so their allocations should be assessed separately.
Investors should also look for indirect exposure through underlying funds and ETFs, where relevant. This can reveal overlapping investments that might otherwise be missed when reviewing only directly held securities.
How Can Investors Calculate Portfolio Overlap?
A weighted overlap calculation offers a practical way to compare two equity funds. For each stock held by both funds, identify the smaller of the two portfolio weights and add these amounts together.
For instance, suppose Fund A allocates 8% of its portfolio to a company, while Fund B allocates 5% to the same company. That stock contributes five percentage points to their weighted overlap.
The calculation is repeated for every common stock. Adding the results estimates the overlap between the two portfolios based on their respective holdings.
However, this calculation has limitations. It does not fully account for sector concentration, indirect exposure, asset allocation, or relationships among securities. Investors should not use the resulting percentage as the sole measure of diversification.
It is also important to compare holdings from the same reporting period. Portfolio weights change as fund managers trade securities and market prices fluctuate. Using disclosures from different dates can lead to misleading comparisons.
For multi-asset schemes, investors should assess equity overlap separately from debt and commodity exposure before considering how the scheme affects the portfolio as a whole.
How Does Adding a Multi-Asset Scheme Change the Overall Portfolio?
Consider an investor with an existing portfolio worth ₹10 lakh, comprising ₹7 lakh in equity investments and ₹3 lakh in debt investments. The investor is considering investing another ₹1 lakh in a scheme that allocates 50% to equity, 30% to debt and 20% to gold.
The following example illustrates the effect on the combined portfolio.
| Asset class | Existing portfolio | New investment | Combined portfolio |
| Equity | ₹7,00,000 | ₹50,000 | ₹7,50,000 |
| Debt | ₹3,00,000 | ₹30,000 | ₹3,30,000 |
| Gold | ₹0 | ₹20,000 | ₹20,000 |
| Total | ₹10,00,000 | ₹1,00,000 | ₹11,00,000 |
After the investment, equity represents approximately 68.2% of the combined portfolio, debt accounts for 30% and gold represents 1.8%.
Although the new scheme allocates 20% to gold, gold makes up only a small proportion of the investor’s total holdings. This illustrates why investors must consider an investment’s size alongside its internal allocation.
Next, examine the scheme’s individual equity holdings. If these overlap substantially with existing funds, the investor may be more exposed to particular companies than the asset allocation figures suggest.
This distinction matters when deciding whether an additional investment offers meaningful diversification.
Does Portfolio Overlap Always Mean an Investment Is Unsuitable?
No. Overlap should be evaluated in the context of an investor’s financial objectives and existing investments.
For example, an investor may hold a broad-market index fund alongside an actively managed equity fund. Some overlap is expected because both schemes invest in the same market, even though their investment strategies differ.
The important question is whether the combined exposure remains appropriate. Investors should assess whether repeated holdings create excessive dependence on particular companies or sectors and whether the proposed scheme adds enough diversification to justify its costs.
Different securities can also carry similar risks. Several companies operating in the same industry may be affected by common economic developments, even if their individual businesses differ.
Similarly, equity, debt and commodities may respond differently to market conditions, but their behaviour is not guaranteed to remain independent during periods of market stress. A scheme with limited direct overlap may still increase overall risk if it adds substantial exposure to an asset class in which the investor is already heavily invested.
The purpose of overlap analysis is therefore not to eliminate every common holding. It is to understand the combined risk and determine whether each investment serves a distinct purpose.
Where Can Investors Find Reliable Portfolio Information?
Investors can review monthly portfolio disclosures, scheme factsheets and scheme-related documents published by asset management companies. These resources provide information about individual securities, asset allocation, sector exposure and other relevant details.
A practical review should include the following steps:
- Check that portfolio disclosures relate to comparable reporting dates.
- Identify the largest holdings and companies appearing across multiple schemes.
- Compare sector allocations and exposure to debt issuers.
- Review the scheme’s stated asset allocation limits alongside its actual holdings.
- Examine indirect exposure through underlying funds or ETFs, where applicable.
- Reassess the portfolio whenever a significant investment or allocation change occurs.
Investors should distinguish between a scheme’s permitted allocation and its actual allocation at a particular point in time. A scheme may have flexibility to change its investments within defined limits, so a single portfolio disclosure may not represent its allocation permanently.
Maintaining a consolidated record of mutual fund holdings can make these comparisons easier. It also helps investors understand their total exposure to individual companies, sectors and asset classes.
What Other Factors Should Investors Consider Before Investing?
Portfolio overlap is only one part of a sound investment assessment. Investors should also evaluate the proposed scheme’s suitability, costs and risk characteristics.
Investment objective: Determine whether the scheme meets a genuine portfolio need or duplicates an existing investment.
Asset allocation strategy: Understand the scheme’s allocation limits and how it distributes investments across equity, debt, commodities and any other permitted categories.
Risk profile: Consider equity market volatility, interest rate movements, credit risks and commodity price fluctuations. A diversified structure does not eliminate the possibility of losses.
Expense ratio: Compare the proposed scheme’s costs with those of existing investments. Multiple schemes with similar exposures may increase expenses without providing a corresponding diversification benefit.
Investment horizon: Assess whether the scheme’s risk characteristics suit the period over which the money can remain invested.
Tax implications: Consider the applicable tax treatment and the consequences of redemptions or changes to existing investments. Tax treatment depends on the scheme’s classification and prevailing rules.
Fund management approach: Examine how the scheme manages asset allocation and concentration. Past performance can provide context, but it cannot establish that a particular investment strategy will always be suitable.
Investors should assess these factors together rather than choosing a scheme solely on its category or recent returns.
How Often Should Investors Review Portfolio Overlap?
Portfolio overlap is not a one-time assessment. Fund managers change their holdings, market prices fluctuate and the relative weights of different asset classes shift over time.
Investors should review their combined portfolio periodically and whenever they add a significant investment or change an existing allocation.
Rebalancing may be appropriate when the portfolio moves away from the investor’s intended asset allocation. Depending on the circumstances, investors may choose to direct new investments toward underrepresented asset classes instead of selling existing holdings.
Before making changes, investors should consider exit loads, transaction costs and tax consequences. A high overlap percentage alone is not sufficient reason to redeem a scheme.
Investors researching the term MAAF fund should apply the same principles: examine the underlying holdings, understand the allocation strategy and determine whether the scheme complements their existing investments. The terminology used to describe a fund should not replace an assessment of its actual portfolio.
Conclusion
Portfolio overlap deserves careful attention before investors add another mutual fund. Different schemes can hold the same securities, concentrate on similar sectors or carry comparable risks, even when their investment strategies appear distinct.
Comparing underlying holdings, calculating weighted overlap, and reviewing the combined allocation across equity, debt, and commodities can help investors decide whether a proposed scheme adds meaningful diversification.
Investors should also consider costs, investment objectives, risk tolerance, and tax implications before deciding. The goal is not to eliminate every common holding but to ensure that investments work together in a way that suits the investor’s financial objectives.
A well-constructed portfolio depends on the quality of its overall allocation, not the number of schemes it contains. Careful analysis can help investors decide whether adding a scheme is justified by their existing exposure and investment needs.