How Long-Duration Funds Work in the Fixed-Income Market

What is a Long-Duration Fund?

A long-duration fund is a mutual fund that invests in debt securities and keeps a portfolio duration of over seven years, as defined by the Securities and Exchange Board of India (SEBI). It mainly invests in government securities and high-rated long-term corporate bonds. The fund earns interest income and can gain in value when long-term interest rates fall. Because of the longer duration, its NAV moves more when interest rates change. It is commonly used to add interest-rate exposure within a debt portfolio.

Advantages of Long Duration Funds

Long-duration funds present certain structural benefits linked to their focus on extended-maturity debt instruments.

• Potential for Capital Appreciation: When interest rates fall, long-term bond prices usually rise more than short-term bonds. Long-duration funds can benefit from this and support better returns over time.
• Diversification Within the Debt Universe: These funds invest in different long-term securities and issuers. This helps spread risk within a debt portfolio.
• Regular Income Stream: Long-duration funds earn regular income from bond interest payments. This provides a steady income along with possible price gains.

Drawbacks of Long Duration Funds

While they can be beneficial, such funds still carry risks related to long-term debt.

• High Interest Rate Risk: Funds with extended durations tend to show larger price movements as interest rates fluctuate. During a rising rate period, bond values drop, and the fund's NAV may fall sharply before stabilising.
• Credit Risk and Yield Trade-offs: Pursuing higher yields might result in some funds holding corporate bonds with lower credit ratings. This strategy can carry more credit risk and the risk of borrower nonpayment, which may impact returns.
• Liquidity Considerations: While long-duration funds mainly invest in actively traded government securities, liquidity constraints may arise during periods of extreme market stress.

Practical Considerations Before Investing

Before considering long-duration funds, investors should reflect on:

• Investment Horizon: These funds suit long-term perspectives, often for durations exceeding five to seven years.
• Risk Tolerance: Higher sensitivity to interest rate changes means price volatility is normal; investors should have a suitable risk appetite.
• Expense Ratios: Management fees and operating costs can erode returns, so comparing expense ratios across funds is advisable.
• Portfolio Role: These instruments can sit beside other fixed income assets and provide diversification within larger investment mixes.

Taxation of Long-Duration Funds in India

As per the latest tax rules, which remain unchanged in the Budget 2026, capital gains on debt-oriented schemes, such as long-duration funds, are subject to the rate of income tax on the investor. This is regardless of the holding period, provided that the units were purchased on or after 1 April 2023. Such acquisitions have done away with the previous short-term and long-term capital gain distinction, including indexation benefits. This tax system remains in effect unless it is changed by some future law.