Chapter 11 of 15
Debt Mutual Funds Explained
Liquid, corporate bond, gilt — when to use debt funds.
Anita kept her emergency fund — ₹3 lakh — in a savings bank account earning 3.5% p.a. Her colleague Priya was earning ~6.5% on a similar amount in a liquid mutual fund, with the same ability to withdraw the money within 24 hours of need. The difference: Priya understood debt mutual funds. Many investors focus entirely on equity and ignore the debt fund universe — missing out on superior returns for short-term goals and crucial portfolio stability.
What Are Debt Mutual Funds?
Debt mutual funds invest in fixed-income securities — instruments where the issuer promises to pay a fixed rate of interest over time. These include:
- Government Securities (G-Secs): Issued by the Central and State governments. Zero credit risk — the government cannot default on INR debt.
- Treasury Bills (T-Bills): Short-term government securities (91-day, 182-day, 364-day).
- Corporate Bonds: Issued by companies to raise capital. Higher yield than G-Secs but carry credit (default) risk.
- Certificates of Deposit (CDs): Issued by banks. Short-term, high credit quality.
- Commercial Paper (CP): Short-term debt issued by large companies.
Two Risks Every Debt Fund Investor Must Understand
The RBI raises interest rates by 0.5% (50 basis points) in a policy meeting. Consider a Gilt Fund with:
- Modified Duration: 10 years
- Current NAV: ₹100
The fund's NAV falls to approximately ₹95 almost immediately after the rate hike. This is not a permanent loss — over time, as the bonds are held to maturity and interest accrues at the new higher rates, the NAV recovers. But in the short term, long-duration funds like gilt funds take NAV hits when rates rise.
Conversely, when RBI cuts interest rates by 0.5%, the same 10-year duration gilt fund would see its NAV rise by ~5%. This is why gilt funds can be used tactically during falling interest rate cycles — but they're not suited for risk-averse short-term investors.
Debt Fund Sub-Categories and Where to Use Them
| Category | Investment Maturity | Credit Risk | Returns (approx)* | Ideal For |
|---|---|---|---|---|
| Overnight Fund | 1 day (overnight) | Nil | 6–6.5% p.a. | Ultra short-term parking (even 1 day) |
| Liquid Fund | Up to 91 days | Very low | 6.5–7% p.a. | Emergency fund, short-term parking |
| Short Duration Fund | 1–3 year maturity | Low-Moderate | 7–7.5% p.a. | 1–3 year goals |
| Corporate Bond Fund | Varies, high-quality only | Low (AA+ bonds) | 7–8% p.a. | 2–4 year goals with slightly higher yield |
| Banking & PSU Fund | Varies | Very low (banks/PSUs) | 7–7.5% p.a. | Conservative debt investors |
| Gilt Fund | Long (10–30 years) | Nil (G-Secs only) | 7–10% (volatile) | Rate fall cycles, very long-term |
| Dynamic Bond Fund | Actively managed duration | Low-Moderate | 7–9% (variable) | Those who trust the fund manager on rates |
Returns are approximate and based on historical ranges. Debt fund returns are not fixed and may vary significantly. Past performance is not a guarantee of future returns.
A liquid fund earns approximately 6–7% p.a. vs 3–4% in savings accounts, and you can withdraw money within 1 business day (T+1 redemption). Overnight funds are even safer with T+0 intraday instant redemption on platforms like Groww. For your emergency fund, parking in a liquid or overnight fund is strictly better than a savings account — same liquidity, significantly higher returns.
In April 2020, Franklin Templeton India wound up 6 of its debt funds that had invested heavily in lower-rated corporate bonds (A and BBB-rated) for higher yields. When COVID hit and the credit markets seized up, these bonds became illiquid and several issuers faced stress. Investors were locked out of their money for years. This episode destroyed trust in high-yield debt funds. Lesson: in India's debt fund universe, stick to funds investing only in AAA/AA+ or G-Secs. The extra yield from lower-rated bonds is never worth the credit risk.
Debt Fund Taxation (Post Finance Act 2023)
An important regulatory change: the Finance Act 2023 removed the indexation and flat-rate LTCG tax benefit that debt funds previously enjoyed. From April 1, 2023:
- Gains from debt mutual funds (funds with <35% equity) are now added to your income and taxed at your applicable income tax slab rate, regardless of holding period.
- There is no longer any long-term/short-term distinction for debt funds — all gains are treated as income.
- This largely brings debt funds' tax treatment in line with fixed deposits, reducing their previous tax advantage.
Despite this change, liquid and overnight funds still offer superior returns to savings accounts (6.5–7% vs 3–4%), and the ease of investment and redemption makes them valuable tools.
The RBI unexpectedly raises interest rates by 1%. Which type of debt mutual fund will see the LARGEST fall in NAV?
Key Takeaways
- Debt funds carry two main risks: credit risk (issuer default) and duration risk (NAV falls when interest rates rise). Stick to high-quality (AAA/G-Sec) funds to avoid credit risk.
- Liquid and overnight funds are ideal for emergency funds — they earn 6–7% p.a. vs 3–4% in savings accounts with the same effective liquidity.
- Gilt funds can gain significantly when RBI cuts rates but can lose 5–15% when rates rise sharply — not suitable for risk-averse short-term investors.
- Post-Finance Act 2023, debt fund gains are taxed at your income tax slab rate regardless of holding period, removing the previous indexation advantage.