Gilt Funds
A gilt fund is a debt mutual fund that invests at least 80% of its total assets in government securities across maturities, offering negligible credit risk but potentially high interest rate risk.
What Are Gilt Funds?
A gilt fund is an open-ended debt mutual fund that must invest at least 80% of its total assets in government securities (G-secs), across maturities. G-secs are bonds and bills issued by the Government of India, and, as commonly included in gilt fund mandates, by State Governments (State Development Loans). The word "gilt" comes from "gilt-edged", an old term for very high-quality government paper.
Gilt funds exist for investors who want debt exposure with negligible credit risk, because the borrower is the government. However, they can carry significant interest rate risk, since many gilt funds hold long-dated bonds whose prices move sharply when interest rates change.
The Securities and Exchange Board of India (SEBI) has two gilt categories:
- Gilt Fund: minimum 80% in G-secs across maturity.
- 10-year Constant Maturity Gilt Fund: minimum 80% in G-secs such that the portfolio's Macaulay duration is equal to 10 years.
How Does a Gilt Fund Work?
- Investors buy units at the applicable Net Asset Value (NAV) via lump sum, SIP or STP.
- The fund buys government securities, including dated G-secs, Treasury bills (T-bills) and, where permitted by the SID, State Development Loans.
- The fund manager chooses the duration. A plain gilt fund can hold short or long bonds and may change its duration based on the interest rate outlook. A 10-year constant maturity gilt fund keeps duration around 10 years.
- Returns come from two sources: interest (coupon) accrual and changes in bond prices. When market yields fall, long G-sec prices rise and the NAV can jump. When yields rise, prices fall.
- Liquidity rule: Gilt funds and 10-year constant maturity gilt funds are among the categories exempted from SEBI's requirement that open-ended debt schemes hold at least 10% in liquid assets. (G-secs are generally among the most actively traded instruments in the Indian bond market.)
Practical Example (Illustrative)
Vikram invests ₹3,00,000 in a gilt fund. Assume the portfolio has a Macaulay duration of 8 years and a yield to maturity (YTM) of 7%. These are hypothetical figures.
Step 1: Modified duration = 8 ÷ (1 + 0.07) = 8 ÷ 1.07 ≈ 7.48
Step 2: Impact of a 0.75% change in market yields Approximate % change ≈ 7.48 × 0.75% ≈ 5.61%
| Scenario | Approximate change | Value of ₹3,00,000 |
|---|---|---|
| Yields fall by 0.75% | +5.61% ≈ +₹16,822 | ≈ ₹3,16,822 |
| Yields rise by 0.75% | −5.61% ≈ −₹16,822 | ≈ ₹2,83,178 |
These estimates ignore convexity, expenses and coupon income, which would add roughly the YTM (minus expenses) over a year. The point is that a long-duration gilt fund can gain or lose several percent in a short time, even with no credit risk.
Why Is It Important?
- Credit safety: The government is generally considered the safest borrower in the domestic debt market, so default risk on G-secs is negligible.
- Interest rate sensitivity: Gilt funds are among the most direct ways to take a view on interest rates through mutual funds. Falling rates can produce strong returns; rising rates can produce losses.
- Portfolio role: Some investors hold gilt funds for diversification, since government bond prices often behave differently from equities during periods of stress. This relationship is not guaranteed.
- Horizon matching: Because of potential volatility, gilt funds are generally aligned with longer holding periods unless the scheme keeps duration short.
Key Features
| Feature | Gilt Fund | 10-year Constant Maturity Gilt Fund |
|---|---|---|
| Core rule | Min. 80% in G-secs, across maturity | Min. 80% in G-secs with portfolio Macaulay duration equal to 10 years |
| Credit risk | Negligible on G-secs | Negligible on G-secs |
| Interest rate risk | Varies with the manager's duration choice | Consistently high, near 10-year duration |
| Liquid asset rule | Exempt from the 10% minimum | Exempt from the 10% minimum |
| Risk label | Riskometer and PRC matrix | Riskometer and PRC matrix |
Benefits and Limitations
Benefits
- Negligible default risk on the government securities held.
- High liquidity of underlying G-secs in the secondary market.
- Potential capital gains when interest rates fall.
- Professional management of duration, without needing to buy bonds directly.
Limitations and risks
- High interest rate risk, especially in long-duration or constant maturity gilt funds.
- Unpredictable short-term returns, which can be negative for months.
- Timing risk: investing just before a rate rise can lead to poor short-term outcomes.
- Slab-rate taxation for units bought on or after 1 April 2023.
Gilt Funds vs Related Concepts
| Concept | Meaning | Key difference | Practical implication |
|---|---|---|---|
| Gilt Funds | Min. 80% in G-secs across maturity | Sovereign credit; duration varies | Low credit risk, potentially high rate risk |
| 10-year Constant Maturity Gilt Funds | G-secs with ~10-year portfolio duration | Duration fixed near 10 years | Very sensitive to rate moves |
| Banking & PSU Funds | Min. 80% in bank/PSU/PFI/municipal debt | Non-sovereign issuers | Some credit risk, usually higher yield |
| Corporate Bond Funds | Min. 80% in AA+ and above corporate bonds | Corporate credit | Higher yield, some credit risk |
| Dynamic Bond Funds | Invest across duration and issuers | Not limited to G-secs | Manager can take both rate and credit calls |
| Buying G-secs directly | Holding government bonds yourself | No fund expense; you manage maturity | If held to maturity, price swings matter less |
How Does It Apply to Mutual Fund Investors?
- Scheme selection: Check average maturity, Macaulay duration and YTM in the factsheet. A fund with a 10-year duration will behave very differently from one with a 3-year duration.
- Holding period: Investors generally consider gilt funds with longer horizons, so that interest accrual can offset temporary price falls.
- SIP or lump sum: SIPs can spread entry over different rate levels. A lump sum invested just before rates rise may show losses for some time.
- Taxation: Gilt funds invest more than 65% in debt instruments, so they fall under the "specified mutual fund" definition applicable from 1 April 2025 (explained on AMFI's tax page). Gains on units bought on or after 1 April 2023 are taxed at slab rates regardless of holding period. Units bought earlier follow the older rules (long-term after 24 months; 12.5% without indexation for transfers on or after 23 July 2024). The Income-tax Act, 2025 applies from 1 April 2026; confirm details with a tax adviser.
- Monitoring: Track changes in duration and the benchmark comparison to understand performance.
Common Mistakes and Misconceptions
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"Government bonds mean guaranteed returns." Correct understanding: The government guarantees interest and principal on its bonds, not the market price. Fund NAVs move with market prices. Why it matters: Gilt fund investors can see losses over short periods.
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"Gilt funds suit short-term parking." Correct understanding: Long-duration gilt funds can be volatile; short-term needs are usually met by categories such as liquid funds or overnight funds. Why it matters: Wrong category choice can cause losses when you need the money.
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"All gilt funds have the same risk." Correct understanding: Duration varies widely between gilt funds, except constant maturity funds, which stay near 10 years. Why it matters: Compare durations, not just category names.
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"Past high returns will repeat." Correct understanding: Strong gilt fund returns often follow periods of falling interest rates and may not repeat when rates stabilise or rise. Why it matters: Chasing recent returns can mean buying at the wrong point in the rate cycle.
Important Terms to Know
- Debt Mutual Funds: Funds investing mainly in bonds and money market instruments. Related glossary topic.
- Interest Rate Risk: The risk of bond prices falling when rates rise. Related glossary topic.
- Credit Risk: The risk of an issuer defaulting. Related glossary topic.
- Dynamic Bond Funds: Debt funds that change duration based on the rate outlook. Related glossary topic.
- Volatility: How much an investment's value fluctuates. Related glossary topic.
- Investment Horizon: How long you intend to stay invested. Related glossary topic.
- Target Maturity Funds: Passive debt funds that hold bonds maturing around a fixed date. Related glossary topic.
Key Takeaways
- Gilt funds invest at least 80% in government securities across maturities.
- They have negligible credit risk but can carry high interest rate risk.
- The 10-year constant maturity gilt fund keeps duration at 10 years and is consistently rate-sensitive.
- Gains on units bought on or after 1 April 2023 are taxed at slab rates.
- Match the fund's duration with your time horizon before investing.
Related Glossary Terms
- Debt Mutual Funds
- Dynamic Bond Funds
- Banking & PSU Funds
- Target Maturity Funds
- Interest Rate Risk
- Medium Duration Funds
References
- SEBI, Circular on Categorization and Rationalization of Mutual Fund Schemes, 26 February 2026
- SEBI, Master Circular for Mutual Funds, 20 March 2026
- AMFI, Tax Regime for Mutual Funds
Disclaimer
This content is for educational and informational purposes only and is not personalised investment, tax or legal advice. Mutual fund investments are subject to market risks; read all scheme-related documents carefully. Consult a qualified tax adviser for tax matters. Investment decisions should consider your financial goals, risk profile and the relevant scheme documents.
Want to understand how interest rates shape debt fund returns? Explore related terms in the FynnChintan Financial Glossary.
Frequently Asked Questions
What does a gilt fund invest in?
At least 80% of its total assets are invested in government securities across maturities. These can include dated government bonds and Treasury bills, and State Government securities where the scheme permits.
How are gilt funds taxed?
They are specified mutual funds because they invest more than 65% in debt instruments. Gains on units bought on or after 1 April 2023 are taxed at your income-tax slab rate, regardless of holding period, as per rules applicable from 1 April 2025. Check the latest rules before investing.
Can gilt funds lose money?
Yes. While default risk on government securities is negligible, gilt fund NAVs fall when market interest rates rise. Long-duration gilt funds can show noticeable short-term losses.
What is a 10-year constant maturity gilt fund?
It is a separate SEBI category that invests at least 80% in government securities while keeping the portfolio's Macaulay duration equal to 10 years. Its interest rate sensitivity remains consistently high.
When do gilt funds tend to do well?
They tend to benefit when market interest rates fall, because existing bonds with higher coupons become more valuable. Predicting rate movements is difficult, so many investors focus on horizon and duration rather than timing.
Are gilt funds better than buying government bonds directly?
They serve different needs. A fund offers diversification across maturities, professional management and easy redemption, but charges an expense ratio and has no fixed maturity. Holding a bond to maturity directly reduces the impact of price swings but requires you to manage reinvestment.
This explanation is for general education only and is not investment advice. Mutual fund investments are subject to market risks; read all scheme-related documents carefully.