Dr Dhiraj presents an insightful guide on DifferentTruths.com, exploring how strategic bond portfolio construction transforms fixed-income investing for everyday investors.

Suppose you have finally decided that bonds deserve a place in your investment portfolio. You have understood coupons, yields and prices. You have learnt why ratings matter but are not guarantees. You know where bonds can be purchased, and you have also understood that the return shown on the screen is not necessarily the return you finally keep.

Now comes the practical question. You have ₹10 lakh available. Should you put the entire amount into one attractive bond offering 9%? Or should you buy five different bonds? Should all of them mature in the same year? Should you buy only corporate bonds? Should some money go into government securities? And what happens if you suddenly need the money before maturity?

These questions take us from bond selection to bond portfolio construction.

The Problem with Putting Everything into One Bond

Let us imagine that Ramesh has ₹10 lakh to invest. He finds a corporate bond offering an attractive yield and decides to put the entire amount into it. The rating is good, the return looks attractive, and the maturity is five years away.

At first, Ramesh feels very comfortable. But he has quietly created a concentration risk. All ₹10 lakh is now dependent on one issuer, one instrument and one maturity. If something unexpected happens to that issuer, the entire investment is affected. Even if the issuer remains perfectly healthy, Ramesh may face a problem if he suddenly needs his money and the bond does not have enough liquidity in the market. This does not mean that the bond is bad. The problem is the size of the bet.

This is one of the most important principles of investing: a good investment can become a bad portfolio decision if too much money is concentrated in it.

Diversification is Not Only for Shares

Many people understand diversification when investing in equities. They may own shares of banks, technology companies, automobiles, pharmaceuticals and consumer businesses. But when they move towards bonds, they sometimes forget the same principle.

SEBI’s investor guidance also emphasises diversification as a way of reducing the impact of poor performance in any single investment. It links asset allocation with financial goals, risk tolerance and investment horizon.

Bond diversification can happen in several ways. You can diversify across issuers, sectors, credit quality, maturities and types of bonds. You might hold government securities alongside high-quality corporate or PSU bonds rather than expecting one bond to perform every role.

The objective is not to collect as many bonds as possible. The objective is to avoid allowing one mistake or one unexpected event to damage the entire portfolio.

Think of Your Bond Portfolio as a Set of Buckets

A useful way for a beginner to think about bonds is to imagine several buckets. The first bucket is money that you may need relatively soon. This money should not be locked away simply because a five-year bond offers a slightly higher yield.

The second bucket is money required after a few years, perhaps for a child’s education, a planned purchase or another known financial objective. This money can potentially be matched with bonds whose maturity is closer to the time when the money will be needed.

The third bucket is genuinely long-term money that you do not expect to touch for several years. The important idea is that the maturity of the bond should have a relationship with the purpose of the money. If you know that ₹3 lakh will be required in 2029, buying a bond that matures in 2036 merely because it offers a higher yield may create a mismatch. You may eventually have to sell the bond before maturity, and its market price at that time may be higher or lower than what you expected.

Maturity Matching: A Simple but Powerful Idea

Suppose Dinesh has ₹12 lakh that she expects to use over the next six years. Instead of putting all ₹12 lakh into one six-year bond, she could think in terms of different maturity dates. She might have some money maturing in two years, another portion in three or four years and another portion later. This creates a kind of natural sequence. When the first bond matures, she gets money back. She can then decide whether to use it or reinvest it. When the second bond matures, another amount becomes available.

This approach reduces the danger of having all investments locked until one single date. It also creates flexibility. If interest rates are attractive when one bond matures, she can reinvest. If she needs the money, she can use it. If the economic environment has changed, she can make a fresh decision rather than being forced to remain invested.

This idea becomes even more useful when we discuss bond laddering, which will be an important topic in a later column.

Should Every Bond Be AAA?

After our earlier columns on credit ratings, some readers may come to another extreme and think, “Fine, I will buy only AAA bonds.” That is safer as a starting principle than unthinkingly chasing high-yield bonds, but even here we should be careful.

A high credit rating is important, but it does not eliminate every other risk. A bond can still be affected by changes in interest rates and liquidity. SEBI specifically cautions investors that ratings are only an opinion from a rating agency and can change. A sensible portfolio therefore does not simply ask, “Is this bond AAA?” It asks, “Does this bond fit the purpose, maturity, risk and overall structure of my portfolio?”

Let us return to Ramesh and assume that he has ₹10 lakh for his medium- to long-term fixed-income allocation. Instead of putting the entire amount into one corporate bond, he might decide to divide it among different categories. For illustration, he could keep a meaningful portion in government securities, another portion in high-quality PSU or corporate bonds and a smaller portion in other carefully selected opportunities depending on his risk tolerance.

The exact percentages should not be treated as a universal formula. A retired investor requiring regular income and capital preservation will have a very different portfolio from a 35-year-old investor who already has substantial equity investments and is using bonds to diversify.

The important principle is that the bond portfolio should be designed around the investor, not around whichever bond happens to be advertised most aggressively.

Don’t Build Ten Bonds from the Same Borrower

There is another mistake that is easy to miss. Suppose an investor owns three different bonds issued by three different companies. At first glance, this looks diversified. But imagine that all three companies belong to the same industry and are exposed to the same economic problem.

The investor has diversified the names but not necessarily the underlying risk. Similarly, owning bonds from several companies that are ultimately part of the same business group may create more concentration than it appears. Good diversification asks not only, “How many bonds do I own?” but also, “How independent are the risks I am taking?”

Liquidity Matters More Than Beginners Expect

Shares are generally easier for ordinary investors to understand because they see prices moving every second during market hours. Bonds can behave differently. A bond may have a stated maturity five years away, but that does not mean you can always sell it immediately at a fair price. If there are few buyers, you may have to accept a less attractive price.

SEBI identifies liquidity risk as one of the important risks of bonds and notes that an investor needing to sell before maturity may be affected by market conditions and availability of buyers. Therefore, an emergency fund should not be replaced with long-term corporate bonds merely because the bond promises a higher return.

Your emergency money has a different job.

The Portfolio Should Have a Job

This is perhaps the simplest way to think about the entire subject. A bond is not purchased merely because it pays interest. It should have a job in your financial life. One bond may be there to preserve capital. Another may provide predictable income. Another may match a future expense. Another may diversify an equity-heavy portfolio. Once you start thinking this way, bond investing becomes much more logical. You stop asking, “Which bond gives the highest return?” and start asking, “Which bond does the job I need it to do?”

What About Government Securities?

Government securities can play an important role in the safer part of a fixed-income portfolio, because the credit risk associated with sovereign Government of India securities is fundamentally different from that of corporate issuers. But they are not completely free from investment risk. Their market prices can move when interest rates change, particularly when an investor sells before maturity.

This distinction is important. Credit safety and price stability are not the same thing. A government security can be held to maturity and pay according to its terms, while its market price may still rise and fall before maturity. That is exactly why understanding the difference between holding a bond until maturity and selling it in the secondary market is so important.

Do Not Confuse Diversification with Complexity

There is a temptation among new investors to believe that a sophisticated portfolio must contain many different products. It does not. If you have ₹5 lakh to invest in bonds, you do not necessarily need fifteen different securities. Five carefully selected instruments may be more sensible than fifteen poorly understood ones.

Every additional bond brings another issuer to monitor, another maturity date to remember, another set of documents to understand and another tax record to maintain. The goal is not maximum complexity. The goal is adequate diversification with manageable understanding.

The Final Words…

A bond portfolio should look less like a shopping basket and more like a carefully planned financial map. Before buying a bond, ask what the money is for. Then ask when you will need it. Then consider how much credit risk you are willing to accept, how much liquidity you may need and how the investment fits with everything else you already own.

If one bond gives you an attractive return but puts 80% of your fixed-income money at risk with one issuer, it may not be a sensible choice. If five bonds give you slightly lower average returns but provide better diversification and maturity matching, they may serve you better.

There is no prize for owning the bond with the highest coupon rate. The real achievement is building a portfolio that allows you to sleep peacefully while your money works in the background. And once we understand this, the next logical step is to explore one of the most useful techniques in fixed-income investing: bond laddering—how different maturity dates can turn a collection of bonds into a more predictable stream of available money.

Picture design by Anumita Roy

Dr. Dhiraj Sharma

Dr Dhiraj Sharma, faculty in Management Studies at Punjabi University, Patiala, writes at the intersection of economy, finance, governance, culture, literature, and social change. His interdisciplinary work examines how individuals and institutions adapt to economic and societal shifts. Beyond academia, he pursues creative writing—fiction, non-fiction, poetry—and excels as an avid birder, nature/wildlife photographer, and painter in realistic/semi-impressionist styles. He actively supports government/NGO initiatives for bird watching, butterfly monitoring, and natural habitat conservation. He is our Associate Editor: Economy, Finance and Governance.