What Is Overlap Ratio in Mutual Funds and Why Should Every Investor Check It?
Understanding Overlap Ratio
Many investors believe that owning multiple mutual funds automatically provides diversification. However, that is not always true.
If two or more mutual funds invest in many of the same companies, your portfolio may have significant duplication instead of diversification. This is measured through the Overlap Ratio.
The Overlap Ratio represents the percentage of common stocks held by two mutual funds. A higher overlap means both funds own many of the same companies, reducing the diversification benefits of investing in multiple schemes.
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A Simple Example
Suppose you invest in two large-cap mutual funds.
- Fund A holds HDFC Bank, Reliance Industries, Infosys, ICICI Bank and TCS.
- Fund B also holds HDFC Bank, Reliance Industries, ICICI Bank, Larsen & Toubro and Bharti Airtel.
Since several holdings are common, both funds provide similar exposure. Although you own two mutual funds, your actual diversification is much lower than expected.
Why Overlap Ratio Matters
- Prevents unnecessary duplication of investments.
- Improves portfolio diversification.
- Reduces concentration risk.
- Ensures better allocation across sectors and companies.
- Avoids paying management fees for nearly identical portfolios.
- Helps create a more balanced long-term investment strategy.
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How Much Overlap Is Acceptable?
| Overlap Ratio | Interpretation |
|---|---|
| Below 20% | Excellent diversification. |
| 20% – 40% | Healthy overlap and generally acceptable. |
| 40% – 60% | Review the portfolio before adding another fund. |
| Above 60% | High duplication. Consider choosing funds with different investment styles. |
Best Practices for Investors
- Avoid investing in multiple funds with identical investment objectives.
- Combine different categories such as Large Cap, Mid Cap, Flexi Cap and International Funds where appropriate.
- Review your portfolio at least once every year.
- Use overlap analysis before starting a new SIP.
- Focus on portfolio quality rather than the number of mutual funds you own.
Investor Takeaway
Derivative Pro & Nifty Expert Gulshan Khera, CFP®, believes that successful investing is not about owning more mutual funds—it is about owning the right combination of funds. Checking the Overlap Ratio before investing can significantly improve diversification, reduce unnecessary concentration risk and help build a stronger long-term portfolio capable of delivering consistent risk-adjusted returns.
Related Queries
• What is Overlap Ratio in Mutual Funds?
• How can I check overlap between two mutual funds?
• Is a high overlap ratio bad for investors?
• How many mutual funds should I own?
• How can I improve diversification in my SIP portfolio?
SEBI Disclaimer: This article is intended solely for educational purposes and should not be considered investment advice. Mutual fund investments are subject to market risks. Please read all scheme-related documents carefully before investing.
