Saturday, 18 October 2025

Understanding Mutual Fund Debt Schemes: Instruments, Risks, and Fund Types

Abstract

Debt schemes are mutual fund investments focused on fixed-income securities, offering investors a mix of income generation and capital preservation. This article introduces debt schemes, explains their typical underlying instruments, categorizes risks involved, defines key terminologies, and outlines the main types of debt mutual funds as per regulatory standards.

Introduction

Fixed Income investment market is much bigger (at least 3 times)  than the equity market across all economies, and we have big list of investment tools available to invest in fixed income underlying.  

In this article, we will explore Fixed Income investment only from Mutual Fund Perspective (India Market). These fixed-income mutual fund schemes (here onwards Debt Schemes) pool investor money to invest in various debt and money market instruments. They serve as a lower-risk alternative to equity mutual funds, aiming to provide steady returns and preserve capital. A thorough understanding of their components, risks, and classifications helps investors and managers to align these schemes with their financial goals.

What Are Debt Schemes?

Debt schemes are mutual funds that primarily invest in fixed-income instruments such as bonds, treasury bills, and commercial papers. These schemes offer regular income through interest payments and potential capital gains by trading these debt instruments. They are managed actively by fund managers who select securities based on criteria like creditworthiness, maturity, and yield.

Typical Underlying Instruments

Debt schemes invest in a variety of instruments including:

  • Treasury Bills (T-Bills): Short-term government securities with maturities less than one year.
  • Certificate of Deposit (CD): Bank-issued negotiable time deposits with fixed maturity.
  • Commercial Paper (CP): Unsecured short-term corporate debt.
  • Repo/Treasury Repos (TReps): Repurchase agreements used for short-term borrowing. In Indian perspective, TREPS are low risk as they involve government-issued securities and are of very short-term  period(overnight to a few days or weeks). 
  • Government Securities (G-Secs): Bonds issued by the government with varying maturities.
  • Corporate Bonds: Debt securities issued by companies to raise funds.

Risks Associated with Debt Schemes

We as Investor/Manager should be aware of the key risks associated with debt schemes:

  • Credit Risk: The possibility that the issuer may default or downgrade, affecting the value of bonds is risk of credit worthiness of issue.
  • Interest Rate Risk: As market interest rates rise, bond prices often fall, negatively impacting the scheme's net asset value. This price sensitivity of bond due to change in interest rate is called interest rate risk.
  • Liquidity Risk: The difficulty in quickly buying or selling debt securities without significantly affecting their price. In simple term, this risk arises when the fund cannot sell its holdings quickly without impacting the price.

Key Terminologies

  • Yield: The return on investment expressed as an annual percentage, including current yield and yield to maturity. Where Current Yield is calculated by dividing the annual interest income by the current market price of the security while Yield to Maturity (YTM) is the total return anticipated if the investment is held until it matures, factoring in all interest payments and the difference between purchase price and face value.
  • Macaulay Duration: A weighted average time until cash flows are received.
  • Modified Duration: A measure of price sensitivity to interest rate changes, showing how much the bond’s price will change for a 1% change in interest rates.
  • Sovereign Bonds: Bonds issued by a national government, considered low-risk.
  • Credit Ratings: Indicators of credit quality, where AAA is the highest rating reflecting the lowest risk, followed by AA, A, and below, which denote progressively higher risk.

Types of Debt Mutual Fund Schemes

According to regulatory classifications (from SEBI – web-link https://www.sebi.gov.in/legal/circulars/oct-2017/categorization-and-rationalization-of-mutual-fund-schemes_36199.html ), debt schemes are categorized based on maturity and credit quality, some of the popular categories mentioned below.

  • Overnight Funds: Invest in securities maturing in one day, offering high liquidity and very low risk.
  • Liquid Funds: Invest in short-term money market instruments up to 91 days maturity, suitable for parking funds temporarily.
  • Ultra-Short Duration Funds: Invest in debt instruments with maturity between 3 to 6 months.
  • Low Duration Funds: Hold securities maturing within 6 to 12 months.
  • Short Duration Funds: Invest in securities with 1 to 3 years maturity.
  • Medium to Long Duration Funds: Carry securities maturing between 4 to 7 years.
  • Long Duration Funds: Securities with maturity exceeding 7 years, sensitive to interest rate changes.
  • Dynamic Bond Funds: Actively manage portfolio duration based on interest rate outlook.
  • Credit Risk Funds: Invest in lower-rated corporate bonds offering higher potential returns with increased risk.
  • Corporate Bond Funds: Focus on high-rated corporate bonds with relatively stable returns.
  • Gilt Funds: Invest primarily in government securities with minimal credit risk but obviously attached interest risk.

Conclusion

Debt schemes offer a spectrum of investment opportunities with different levels of risk and return, tailored to diverse investor needs. Understanding the underlying instruments, associated risks, key terminologies, and fund classifications equips investors to make informed choices aligned with their financial objectives and risk tolerance.