Mutual Fund Portfolio Overlap Estimator (2026 Strategy Edition)

Are your mutual funds just cloning each other? Use our portfolio overlap tool to identify redundancy across categories. Stop buying the same stocks under different names and improve your diversification for 2026.

Portfolio Funds

Portfolio Health Score

--/100

Select categories to start the analysis.

Overlap & Redundancy Dashboard

Estimated Overlap

0%

Common holdings in your portfolio

Unique Exposure

100%

Non-redundant stock picking

Rupee-at-Risk Visualization

Portfolio Component Table

Code Category Monthly SIP Weight

How Overlap is Estimated

Score = 100 - [(Σ Overlap Prob × Weighted SIP) / Total SIP] - Penalty

Diversity Penalty: A 10% penalty is applied for each category that has more than 2 funds to discourage "scheme hoarding."

Category Probability: In 2026, Large Cap funds share ~80% of stocks with the Nifty 50 Index. Mid & Small caps have lower overlap (~10%).

What is Mutual Fund Overlap?

Mutual Fund overlap occurs when you invest in multiple funds that hold the same underlying stocks in their portfolios. For instance, if you own both an HDFC Index Fund and an SBI Bluechip Fund, you might have an overlap of nearly 90% because both are forced by mandate to buy the same top 100 Indian companies like Reliance, HDFC Bank, and TCS.

While some overlap is inevitable, high redundancy (above 60%) defeats the purpose of diversification. It makes your portfolio "top-heavy," meaning your returns are dependent on just a few stock names rather than the broader market.

Category Overlap Matrix: 2026 Benchmarks

Fund Pair Estimated Overlap Verdict
Index vs Large Cap85% - 95%Highly Redundant
Flexi Cap vs Large Cap55% - 70%Moderate Overlap
Large Cap vs Small Cap5% - 12%Excellent Diversification
Mid Cap vs Small Cap20% - 35%Healthy Blend

Checklist: How to Prune a Redundant Portfolio

  • Consolidate Large Caps: If you have an Index fund, you probably don't need an active Large Cap fund.
  • Verify Flexi-Caps: Many Indian Flexi-cap funds are currently biased towards Large Caps (70%+). Check their mid-cap exposure.
  • Limit Fund Count: An ideal portfolio doesn't need more than 4-5 well-picked mutual funds.
  • Avoid NFO Clones: Don't buy New Fund Offers that track the same theme as your existing funds.
  • Rebalance Annually: Fund managers change stock picks; your overlap should be checked every 12 months.

Technical Insight: Portfolio Concentration Risk

In finance, Tracking Error and Concentration are the two silent profit killers. When your funds have high overlap, your tracking error relative to the index might stay low, but your risk concentration peaks. If the top 5 stocks in the Nifty 50 face a sector-wide correction, a redundant portfolio can lose 20-30% of its value even if you hold "different" mutual fund schemes.

Mutual Fund Overlap FAQs

Is 50% overlap in mutual funds bad?
It's a warning sign. 50% overlap means half your investment is buying identical stocks. You are paying expense ratios to two different AMCs for the same result.
How to check overlap for free in India?
You can use our estimator for a quick category-based check. For stock-by-stock accuracy, platforms like Advisorkhoj or Fundoo provide detailed sheet-based comparisons.
Does high overlap increase my risk?
Yes. It increases "Idiosyncratic Risk." By holding the same stocks in multiple funds, you lose the safety net of having other stocks perform well when one sector or company fails.
How many funds should I have?
An ideal portfolio for most retail investors should have 3-4 categories: 1 Index/Large Cap, 1 Mid Cap, 1 Small Cap, and possibly 1 International or Flexi Cap fund.
Can I have 0% overlap?
Nearly impossible. Most diversified funds will eventually pick the same market leaders. The goal is to keep the aggregate overlap below 30% for a healthy portfolio.
Is overlap bad for tax purposes?
Indirectly, yes. If you decide to consolidate redundant funds, you may trigger LTCG tax (12.5% on gains > 1.25L) upon redemption. Plan your rebalancing carefully.