How to Choose a Debt Fund

This is the most important step. The time until you need the money decides which type of debt fund fits.

• Days to weeks: overnight or liquid funds.
• A few months to a year: liquid, money market or ultra-short funds.
• One to three years: low duration or short duration funds.
• Longer: other categories may fit, with more interest rate risk.

Our page on short-term investment options explains these in more detail.

Look at the fund fact sheet for how much is in government securities, AAA and A1+ instruments, and how much is in lower-rated paper. For emergency money and important goals, prefer funds with mostly top-rated and government holdings.

Our page on credit ratings in debt funds explains what the ratings mean.

Duration measures how sensitive a fund is to interest rate changes. Higher duration means bigger price swings when rates move. Roughly, choose a fund whose duration is not much longer than how long you plan to hold it.

Our page on YTM and modified duration explains these numbers simply.

Every debt fund shows a potential risk class, a grid combining credit risk and interest rate risk. It tells you the maximum risk the fund may take. It is a quick way to compare funds.

Our page on the riskometer explains this and other labels.

Return differences between similar debt funds are often small, so the expense ratio matters a lot. A higher cost can wipe out a small return advantage.

Our page on expense ratio explains how costs work.

Look at how the fund behaved over several years and in periods of stress, not just recent returns. A very small fund may be more affected by large redemptions; a reasonable size spreads that risk.

Our page on fund size and AUM explains why size matters.

A debt fund showing a much higher yield than its peers is usually taking more risk: lower-rated borrowers, longer duration, or both. In good times, that looks great. When a borrower defaults or rates rise, the losses can be large.

Our page on credit risk funds explains this trade-off.

The yield to maturity shown on a fact sheet is the approximate return the portfolio would earn if held to maturity, before costs, assuming no defaults. It is not a promise of your return, especially if rates change or you exit early.

Overnight, liquid, money market, ultra-short, low duration, short duration, corporate bond, banking and PSU, gilt, dynamic bond and credit risk funds each have their own rules.

Our pages on debt funds, money market funds and corporate bond funds explain several of them.

Target maturity funds hold bonds that mature around a set date. If you hold until that date, interest rate swings matter less. They can suit goals with a known date.

Our page on target maturity funds explains how they work.

When interest rates fall, bond prices rise and longer duration funds gain more. When rates rise, the opposite happens. Trying to predict rates is hard, so most investors are better off matching duration to their time frame.

Our post on interest rate changes and mutual funds explains this.

Debt fund gains are taxed under the rules for debt mutual funds at the time. We do not quote tax rates. A tax adviser can explain how this compares with deposits for your situation.

Our page on mutual fund taxation explains the structure.

Most families need only one or two: perhaps a liquid fund for emergencies and a short duration or similar fund for goals a few years away. More funds rarely add much.

• Does the category match my time frame?
• Is credit quality high enough for this money?
• Is the duration sensible for how long I will hold?
• Is the cost reasonable compared with peers?
• Has it behaved steadily through past stress?

Emergency fund: liquid or overnight funds with top-rated holdings, plus some money in a savings account for instant access.

A purchase in about a year: money market or ultra-short funds with high credit quality.

A goal two or three years away: short duration or banking and PSU funds, or a target maturity fund matching the date.

The debt part of a long-term portfolio: a mix that you hold steadily and rebalance once a year.

These are general patterns, not recommendations for your situation.

• Choosing the fund with the highest recent return.
• Using a long duration fund for money needed next year.
• Ignoring credit quality because "debt funds are safe".
• Paying a high expense ratio for a simple category.
• Holding many debt funds that do the same job.

Check your debt funds once a year, or sooner if you hear of a rating downgrade or default affecting the fund. Look at whether the credit quality and duration are still what you signed up for. Funds can drift over time as managers change their approach. If the fund no longer fits your need, switching may make sense after checking exit loads and tax. Our page on switching mutual funds explains how.

• Time frame first, then category.
• High credit quality for important money.
• Duration to match holding period.
• Low cost, and no yield chasing.

We are distributors rather than investment advisers and we recommend no schemes. If you want help choosing a debt fund for a goal, get in touch.