Constant Maturity Gilt Funds (10-Year) – When Do They Shine?

Sidivya Konduru

Last Updated: 17 Aug 2026, 07:02 PM IST

Constant Maturity Gilt Funds – When Do They Shine?
Content

Interest rates play an important role in the performance of debt mutual funds. Among the available debt fund categories, constant maturity gilt funds are designed to maintain exposure to government securities with a constant maturity of around 10 years. Their performance may vary depending on interest rate movements and bond prices. Understanding how these funds work, their features, risks, taxation, and suitable investment horizon can help investors evaluate them as part of a debt investment portfolio. This article explains when constant maturity gilt funds may perform favourably and the factors investors should consider before investing.

What Are Constant Maturity Gilt Funds?

Constant maturity gilt funds are debt mutual funds that invest primarily in Government of India securities while maintaining a constant Macaulay duration of 10 years. Fund managers regularly buy and sell government securities to maintain this maturity profile.

Since these funds invest in sovereign securities, they do not carry corporate credit risk. However, their Net Asset Value (NAV) changes with movements in interest rates and bond prices.

How Do They Work?

A gilt fund with a 10-year constant duration invests mainly in government bonds with a target duration of around 10 years. To maintain this duration, the fund manager may sell existing securities before maturity and replace them with other government securities as required.

When interest rates decline, bond prices generally rise, which may increase the fund's NAV. Conversely, rising interest rates may reduce bond prices and affect the NAV.

Why Do Investors Choose Them?

Some investors consider constant maturity gilt funds for the following reasons:

  • Exposure to Government of India securities.
  • No credit risk from private companies.
  • Opportunity to participate in interest rate movements.
  • Professional management of the bond portfolio.
  • Diversification within a debt investment portfolio.

When Do Constant Maturity Gilt Funds Shine?

The following table shows how these funds may behave under different market conditions.

Market Situation

Possible Impact on the Fund

Interest rates fall

Bond prices may rise, supporting fund performance

Interest rates remain stable

Returns may mainly come from coupon income and portfolio management

Interest rates rise

Bond prices may decline, affecting the NAV

Economic uncertainty

Government securities may receive higher investor interest

Long investment horizon

Investors may experience multiple interest rate cycles

 

Features of Constant Maturity Gilt Funds

The following are some common features of constant maturity gilt funds:

  • Invest mainly in Government of India securities.
  • Maintain an average maturity of around 10 years.
  • No corporate credit risk.
  • Managed by professional fund managers.
  • Performance depends largely on interest rate movements.
  • Available through lump sum investments and Systematic Investment Plans (SIPs).

Understanding the Risks

Although these funds invest in government securities, they are not free from investment risk. Their prices are highly sensitive to changes in interest rates because of their longer maturity profile.

If interest rates increase, the Net Asset Value (NAV) may decline even though the underlying securities are backed by the Government of India. Investors should also understand that returns are market-linked and may vary across investment periods.

Suitable Investor Profile

Constant maturity gilt funds may be considered by investors who understand interest rate risk and have a medium- to long-term investment horizon. They may also be evaluated by investors seeking exposure to government securities through mutual funds instead of buying individual bonds.

Investors with short-term financial goals or low tolerance for price fluctuations may review other debt fund categories based on their investment objectives.

Taxation Rules

The taxation of constant maturity gilt funds follows the tax rules applicable to debt mutual funds. For units purchased on or after 1 April 2023, capital gains are added to the investor's total taxable income and taxed according to the applicable income tax slab rate, regardless of the holding period. No separate Long-Term Capital Gains (LTCG) tax treatment or indexation benefit is available for these investments under the current rules.

Since tax laws may change over time, investors may review the latest tax provisions or consult a tax adviser before making investment or redemption decisions.

How to Approach Investment Timing

Investment timing may influence the experience of holding a constant maturity gilt fund because these funds react to changes in interest rates.

Instead of investing solely based on short-term market expectations, investors may consider their investment horizon, portfolio allocation, and overall financial goals. Regular portfolio reviews may also help align investments with changing market conditions.
 

Advantages of Constant Maturity Gilt Funds

The following are some advantages of these funds:

  • Invest primarily in sovereign securities.
  • No corporate credit risk.
  • Professionally managed portfolio.
  • Opportunity to benefit from declining interest rates.
  • Suitable for diversifying debt investments.
  • Easy access through mutual fund platforms.

Key Points to Remember

The following points summarise the important aspects of these funds:

  • Average maturity is maintained at around 10 years.
  • Returns are influenced by interest rate movements.
  • NAV may fluctuate in the short term.
  • Government securities reduce credit risk but not market risk.
  • Investment horizon plays an important role.
  • Taxation follows the current debt mutual fund rules.

Constant Maturity Gilt Funds vs Regular Gilt Funds vs Target Maturity Funds

The following table highlights the key differences between these three debt fund categories.

Feature Constant Maturity Gilt Fund Regular Gilt Fund Target Maturity Fund
Portfolio Mainly Government securities with around 10-year constant maturity Government securities of varying maturities Bonds held until a specified maturity date
Duration Maintained at around 10 years Changes based on the fund manager's strategy Declines as the target maturity date approaches
Interest Rate Sensitivity Generally higher due to constant duration Varies depending on portfolio duration Usually reduces as maturity approaches
Portfolio Management Active duration management Active management Generally follows a passive investment approach
Maturity Date No fixed maturity No fixed maturity Fixed target maturity
Suitable Investment Horizon Longer investment horizon Depends on the portfolio strategy Can align with a specific financial goal or target date

Each category has a different investment approach. Investors may compare duration, maturity profile, and investment objectives before selecting a debt fund.

Conclusion

Constant maturity gilt funds invest primarily in Government securities while maintaining an average portfolio maturity of around ten years. Their performance is influenced by interest rate movements, making them different from other debt mutual funds. Investors may compare factors such as investment horizon, interest rate sensitivity, portfolio strategy, risks, and taxation before investing. Understanding how these funds differ from regular gilt funds and target maturity funds can help investors evaluate whether they fit within their overall investment plan.

Disclaimer: Investment in securities market are subject to market risks, read all the related documents carefully before investing. For detailed disclaimer please Click here.

Frequently Asked Questions

Capital gains are taxed according to the prevailing debt mutual fund taxation rules applicable at the time of redemption. Investors may check the latest tax provisions before investing.
 

Constant maturity gilt funds maintain an average maturity of around ten years, while regular gilt funds can invest across Government securities with different maturities.
 

Yes. Although these funds invest in Government securities, their Net Asset Value (NAV) may fluctuate because of changes in interest rates and market conditions.
 

These funds generally maintain long-duration portfolios. Investors may compare their investment horizon with the fund's interest rate sensitivity before investing.
 

Both options are available. Investors may choose between a Systematic Investment Plan (SIP) and a lump sum investment based on their investment plan and cash flow.
 

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