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Portfolio Overlap Analyzer

Measure weighted overlap, Jaccard similarity, concentration and look-through duplication across up to five portfolios.

Methodology visibleStress-tested inputsNo buy/sell recommendation

Look-through holdings

Enter security name and portfolio weight %. Each populated portfolio must total 100% ±0.1.

How to use this Portfolio Overlap Analyzer

Portfolio overlap measures whether two apparently different funds or portfolios own many of the same underlying securities. This matters because owning several schemes does not automatically create diversification. The Finin2min analyzer accepts two to five normalized holding lists and compares every pair, helping a user identify duplication before deciding whether the number of schemes is actually adding new exposure.

1. Enter factsReplace sample values with your portfolio, goal or market data.
2. Check assumptionsReturn, inflation, tax, cost and stress inputs remain visible.
3. Read the stress caseDo not rely on the base result alone when downside scenarios are available.

Calculation logic

Weighted overlap is the sum, across common securities, of the lower weight in each pair: Σ min(weight A, weight B). A 7% weight in one portfolio and 4% in another contributes 4 percentage points of overlap. Jaccard similarity is also shown as common holding count divided by the union of holding counts. Each entered portfolio must reconcile to approximately 100%, which prevents a partial list from masquerading as a complete portfolio.

Worked interpretation

Suppose Fund A owns a stock at 8% and Fund B owns it at 5%. That security contributes 5% to weighted overlap, not 13%. Repeating this for all common securities produces a direct measure of duplicated portfolio weight. Users can then inspect the pairwise matrix rather than relying on scheme names or categories alone.

What this result does not prove

Overlap is only as good as the effective-date and completeness of the holdings supplied. Mutual fund portfolios change, and an outdated disclosure can make a current portfolio look more or less similar than it is. The metric also does not by itself identify whether duplication is undesirable: two broad-market funds may intentionally overlap, while two concentrated strategies with lower numerical overlap can still share the same sector risk.

Integrity rule: a calculation can be mathematically correct and still be decision-inappropriate if the inputs, source date or model assumptions are wrong. Finin2min therefore keeps model assumptions visible and avoids converting the result into a security recommendation.

Methodology, data and limitations

This Finin2min tool separates calculation from recommendation. Inputs, return assumptions and stress parameters remain visible and editable. Results are educational scenarios, not forecasts or suitability advice.

Data integrity: do not silently ship stale market/fund data. When the page uses imported official data, retain source authority, effective date, retrieval timestamp, parser version and SHA-256 in the investment data manifest.
Regulatory currentness: the 20 March 2026 SEBI Master Circular states that it consolidates relevant mutual-fund circulars only through 20 March 2026. The source panel therefore also links the Mutual Funds Regulations, 2026 as last amended on 7 July 2026 and the SEBI circulars index for post-Master-Circular developments.

Primary / official references

Questions & answers

What does the Portfolio Overlap Analyzer calculate?

Portfolio overlap measures whether two apparently different funds or portfolios own many of the same underlying securities. This matters because owning several schemes does not automatically create diversification. The Finin2min analyzer accepts two to five normalized holding lists and compares every pair, helping a user identify duplication before deciding whether the number of schemes is actually adding new exposure.

What assumptions drive the result?

Weighted overlap is the sum, across common securities, of the lower weight in each pair: Σ min(weight A, weight B). A 7% weight in one portfolio and 4% in another contributes 4 percentage points of overlap. Jaccard similarity is also shown as common holding count divided by the union of holding counts. Each entered portfolio must reconcile to approximately 100%, which prevents a partial list from masquerading as a complete portfolio.

Can I treat the result as a forecast or recommendation?

No. The output is an educational scenario generated from the values entered. It does not predict market returns, recommend a security or establish suitability for an individual investor.

How should I handle market or mutual-fund data?

Use a current, complete dataset with a recorded effective date. Where the page requires imported scheme, NAV, TER, portfolio or industry data, Finin2min should publish or retain the source authority, retrieval date, parser version and file hash.

What are the main limitations?

Overlap is only as good as the effective-date and completeness of the holdings supplied. Mutual fund portfolios change, and an outdated disclosure can make a current portfolio look more or less similar than it is. The metric also does not by itself identify whether duplication is undesirable: two broad-market funds may intentionally overlap, while two concentrated strategies with lower numerical overlap can still share the same sector risk.

Financial information disclaimer: Investments involve risk. Calculations may omit taxes, costs, liquidity constraints, tracking difference, execution risk or individual circumstances unless explicitly entered. Verify current official documents before acting.

Guides that use this calculator

Background, worked examples and the rules behind these numbers.

Regulatory disclosure — SEBI

Finin2min is not registered with the Securities and Exchange Board of India (SEBI) as an Investment Adviser or as a Research Analyst. This tool performs an arithmetic calculation on the figures you enter and is published for general information and educational purposes only. It is not investment advice, it is not personalised to your financial circumstances, objectives or risk tolerance, and it is not a recommendation to buy, sell or hold any security, scheme or product. Projected values are illustrative and follow directly from the assumptions you supply; actual returns will differ, and past performance does not indicate future results. Consider consulting a SEBI-registered Investment Adviser before acting on any investment decision.