Debt Funds — What They Hold and Where They Fit

Almost everything that happens in a debt fund traces back to one of two things.

Credit risk. Whether the borrowers repay. A scheme holding government securities faces a different position from one holding lower-rated corporate paper, and the second is generally compensated with higher yield precisely because the risk is greater. When a borrower defaults or is downgraded, the scheme\'s value takes the hit.

Interest-rate risk. When prevailing rates rise, existing bonds paying older rates become less attractive, so their prices fall. The longer the remaining maturity of what the scheme holds, the more sharply this moves it. This is why a long-duration scheme can show a loss over a period even though every borrower paid on time.

Understanding those two is most of what a household investor needs. The category names largely describe how much of each the scheme is taking on.

This surprises people who expect something that behaves like a deposit, and it is worth being direct about.

The bonds a scheme holds are valued at what they would fetch in the market, not at what was paid for them. So the NAV reflects current market prices, which move with interest rates and with perceptions of the borrowers, daily.

The size of that movement varies enormously across debt categories, which is why treating them as one thing is misleading. A scheme holding paper maturing in weeks barely moves at all; one holding long government bonds can move as much in a month as some equity schemes do. Same word on the label, very different behaviour.

Over short periods that movement can be negative. Over longer periods the interest being earned tends to dominate, which is why category and horizon have to be matched rather than assumed. A scheme designed for money you might need next month behaves very differently from one designed for a three-year holding.

The honest comparison, without pretending either is strictly better.

A deposit states its rate at the outset, the bank commits to it, and deposits carry DICGC protection up to the limit specified there. You know at the start what maturity brings.

A debt fund promises nothing, its value moves, and there is no such protection. What it offers instead is no fixed tenure to break, redemption within a short window rather than a penalty for exiting early, and a tax treatment that arrives on redemption rather than annually on accrual. Our page on mutual fund taxation sets out that structure without printing rates that change.

Which suits you depends on whether the certainty is worth more than the flexibility. For genuinely fixed near-term commitments, a deposit often wins, as our page comparing mutual funds and fixed deposits explains.

Three places, and they are the same three we point to across the site.

• The layer behind your emergency buffer, where liquid funds and similar very short categories sit, with same-day money still in the bank.
• Near-term goals, within two or three years, where equity has no room to recover from a poor stretch.
• The corpus you are drawing from, where a fall while you are withdrawing monthly does lasting damage, as our page on the Systematic Withdrawal Plan explains.

There is a fourth use worth mentioning because it comes up with business households. Money that is committed but not needed this week, next season's input cost or an amount set aside for a known payment, sits comfortably in a very short category rather than in a current account. What matters there is availability on the date, not what the scheme returned last year.

What debt categories are not for is chasing a better figure than a deposit while assuming the same certainty. That combination does not exist, and the periods when it appears to are exactly the periods before something goes wrong.

Rather than comparing last year\'s figures across categories, which mostly tells you what interest rates did, look at what the scheme is actually taking on.

What is the maturity profile of what it holds, since that decides how much rates move it. What is the credit quality of the borrowers. And what is the expense ratio, which matters proportionally more here than in equity because the range of outcomes is narrower; our page on expense ratio covers why.

And treat any unusually high yield in this space as information rather than as an opportunity. In debt, a higher return generally means the scheme is lending to weaker borrowers or holding longer maturities, and both of those are exactly the risks you chose this category to avoid.

We are distributors rather than investment advisers and we do not recommend schemes here. The framework for matching a category to a purpose is on our page about how to choose a mutual fund, and if you would like to talk through where each part of your money should sit, get in touch.