Investment bonds explained by Mintos | A guide to returns, ratings, and risk

A bond’s headline yield is what draws attention, but it reflects only part of the overall picture. Behind every quoted yield are factors that influence how the bond behaves over time. This becomes particularly relevant when market conditions shift, because interest rates, inflation expectations, and credit spreads all affect how bonds behave.

A clearer understanding of these drivers may help you evaluate whether the return on offer reflects the level of risk involved.

In this guide to bonds

This guide covers the mechanics that sit behind every bond investment, including:

Core features of investment bonds
What drives bond returns
How credit ratings work
Default risk and repayment hierarchy
How maturity shapes risk and return
Bond laddering as a portfolio structure

Investment bonds explained: the core features

Investment bonds can be understood as layered structures, much like a layered cake where each tier depends on the one beneath it. At the base sits the coupon structure. This is the foundation, because it defines what the bond pays and when. Without a clear view of the cash flow pattern, it is difficult to interpret anything that sits above it.

The next layer is pricing. Even if the coupon remains fixed, the market value of those payments changes as interest rates move. Pricing reflects how attractive those future cash flows are relative to newly issued bonds.

The top layer is credit quality. Credit quality influences how much yield investors demand, based on the issuer’s perceived ability to repay.

Fixed vs floating coupons

Returning to the layered structure, the coupon sits at the base. It defines the bond’s cash flow pattern and therefore anchors everything that follows.

A coupon, or coupon payment is the interest payment a bond issuer makes to investors. Its structure determines how income behaves when interest rates change and how sensitive the bond’s price may be to shifts in the rate environment.

Feature	Fixed-rate coupon	Floating-rate coupon
Payment structure	Set at issuance and remains constant throughout the bond’s life	Changes periodically based on prevailing market interest rates
Income predictability	High, payments are known in advance	Moderate, payments vary with the benchmark rate such as Euribor, the daily interbank lending rate administered by the European Money Markets Institute
Interest rate sensitivity	Higher price sensitivity when rates move	Lower price sensitivity due to periodic rate resets

When interest rates rise, new bonds may offer higher coupons. This can make existing fixed-rate bonds less attractive, causing their market prices to fall. This could result in price declines in the secondary market. A floating-rate bond, by contrast, adjusts its coupon in line with market rates, which could help preserve relative value and reduce price volatility.

Price vs yield

Once the cash flow structure is clear, the next layer is pricing. Bond prices and yields move in opposite directions. If price falls, yield rises. If price rises, yield falls.

As market interest rates increase, existing bonds with lower fixed coupons become less attractive. Their prices fall and yields adjust upward to align with prevailing rates.

This relationship becomes most visible during periods of rapid rate change.

Rate shock in practice

Between 2022 and 2023, the ECB sharply increased interest rates. As new bonds began offering higher coupons, older fixed-rate bonds became less attractive and their market prices dropped.

The decline was driven by rising rates, not by worsening credit quality. Investors who kept their bonds until maturity were repaid in full, while those who sold before maturity locked in losses based on lower market prices.

Entry price and total return

Because bond prices move as yields change, the level at which you enter the market directly affects your eventual return.

Whether purchased at issuance or later in the market, a bond may trade at par, at a discount, or at a premium relative to its face value. That entry level determines how much of the return comes from coupon income and how much comes from price adjustment over time.

At par → Return driven primarily by coupon

At a discount → Additional gain at maturity as the bond price moves toward par

At a premium → Part of return is offset as price converges to par

Issuer profile and credit spread

If coupon structure forms the base layer and pricing the next, credit quality is the final layer.

Two bonds with the same coupon and maturity could offer different yields because investors demand additional compensation for different levels of default risk. That difference is called the credit spread.

When perceived risk increases, spreads widen and prices fall. When confidence improves, spreads tighten and prices rise.

What does bond maturity mean?

While credit spread explains why bonds with similar structures might trade at very different yields, maturity determines how long those risks are carried.

Bond maturity is the date on which a bond’s life ends. On that date, the issuer repays the face value to the bondholder and all coupon obligations cease. It is one of the most consequential features of a bond because it defines the investment horizon, shapes the risk profile, and determines how sensitive the bond is to interest rate movements in the meantime.

Bonds are generally grouped by maturity:

Short-term: under 3 years
Medium-term: 3–10 years
Long-term: over 10 years

Maturity vs duration

Duration measures how sensitive a bond’s price is to interest rate changes.

Longer-dated bonds have higher duration and are more sensitive to rate movements. A 1% rise in interest rates will have a much larger impact on the price of a 20-year bond than on a 2-year bond. For investors who need to sell before maturity, this sensitivity can significantly affect the price they receive in the market.

Maturity also affects reinvestment risk. When a short-term bond matures, the investor must decide what to do with the returned capital. If rates have fallen in the meantime, reinvesting at the same yield may not be possible. Longer-term bonds lock in a yield for a defined period, which could be seen as an advantage in a falling rate environment but a disadvantage when rates are rising.

How bond returns are generated

Bond returns come from 2 sources: coupon income and price return.

Coupon income is the regular interest payment received while holding the bond.
Price return arises when a bond is bought below face value and held to maturity, or sold at a higher price than it was purchased for.

The most complete measure of bond returns is yield to maturity (YTM). YTM reflects the total annualised return if the bond is held until maturity and coupons are reinvested. Unlike the coupon rate, it accounts for both income and any gain or loss from buying at a price different from face value.

Example	Face value	Price paid	Coupon rate	YTM
Bond at discount	€1,000	€950	5%	Higher than 5%
Bond at par	€1,000	€1,000	5%	Equal to 5%
Bond at premium	€1,000	€1,050	5%	Lower than 5%

When a bond is purchased below its face value, the investor benefits from both the coupon payments and a capital gain at maturity, pushing the YTM above the coupon rate. When purchased above face value, the capital loss at maturity reduces the effective return below the coupon rate.

What affects bond yields?

Several factors influence bond returns and where yields settle:

Credit risk: Higher default risk requires higher yield compensation.
Duration: As discussed in the maturity section, longer duration increases sensitivity to interest rate changes.
Market conditions: Changes in interest rates, inflation, and the broader economy influence bond prices.
Bond liquidity risk: Less liquid bonds may trade at a discount to compensate investors for the difficulty of exiting early.

How liquidity affects bond returns

Bond liquidity risk refers to how easily a bond can be bought or sold without materially moving its price.

Government bonds from major economies trade in deep, active markets where the gap between buying and selling prices, known as the bid-ask spread, stays narrow. Smaller corporate and high-yield bonds often trade less frequently, with wider spreads and fewer active buyers.

The implication is practical: selling before maturity may involve accepting a lower price, especially in stressed market conditions when liquidity deteriorates quickly.

Bond seniority and repayment hierarchy

Bond seniority determines where a bondholder sits in the repayment order if an issuer defaults. Senior bondholders are paid before subordinated bondholders, who in turn rank ahead of shareholders.

Bonds from the same company pay different yields depending on where they sit in the repayment order. Senior bonds are paid first if the company runs into trouble. Subordinated bonds are paid later. Because subordinated bondholders are further back in the queue, they take on more risk and are usually offered a higher yield in return.

What happens if a company defaults on a bond?

A bond default occurs when an issuer fails to meet its contractual obligations, whether that means missing a coupon payment, failing to repay the principal at maturity, or breaching the terms set out in the bond’s prospectus. Default does not automatically mean you lose everything, but understanding what happens next helps you judge how much you could realistically recover.

The bond default process

A bond default does not resolve quickly. After a missed payment, a grace period usually allows the issuer to remedy the breach. If that fails, default is formally declared and bondholders gain legal rights, including the ability to accelerate repayment.

The issuer may then enter restructuring negotiations to agree revised repayment terms. If no agreement is reached, insolvency proceedings follow and assets are liquidated, with proceeds distributed according to seniority.

How much investors recover depends on where the bond sits in the repayment order and what assets are available to sell. Senior secured bondholders have historically recovered more than unsecured or subordinated investors, who may recover significantly less in liquidation scenarios.

How inflation-linked bonds protect purchasing power

Standard bonds pay a fixed coupon on a fixed principal. That makes income predictable, but it also means the payments do not adjust if prices in the economy rise.

This is where the distinction between fixed and floating coupons becomes relevant. Fixed-rate bonds lock in a coupon at issuance, meaning payments do not adjust as prices rise. Floating-rate bonds reset periodically in line with a benchmark rate, which may offer some indirect protection if rates rise alongside inflation. Inflation-linked bonds take a different approach entirely: rather than adjusting the coupon directly, they adjust the principal against which the coupon is calculated.

Inflation reduces what money can buy. If prices increase over time, the same fixed coupon buys fewer goods and services. This is known as a loss of purchasing power.

Inflation-linked bonds are designed to address this. Instead of keeping the principal fixed, they adjust it in line with an inflation index such as the Consumer Price Index (CPI), which measures changes in average consumer prices over time.

As inflation rises:

The principal increases

Coupon payments increase (because they are calculated as a percentage of the adjusted principal)

The final repayment reflects the higher inflation-adjusted value

Whether bonds are good during inflation depends on structure. Fixed-rate bonds provide nominal income that does not adjust. Inflation-linked bonds are structured to help preserve real purchasing power when prices rise.

How bond ratings work

Bond ratings explained simply: they are independent assessments of an issuer’s ability to meet its debt obligations. Assigned by credit rating agencies, they give investors a standardised way to compare credit risk by different issuers, sectors, and geographies without having to analyse every bond’s underlying financials from scratch.

The three dominant rating agencies globally are Moody’s, S&P Global, and Fitch. Each uses a slightly different notation, but the underlying scale follows the same logic: the higher the rating, the lower the assessed probability of default.

Investment-grade vs high-yield bonds

Ratings fall into 2 broad categories. Bonds rated BBB/Baa or above by the major agencies are considered investment-grade, indicating a lower assessed probability of default and generally attracting more conservative investors. Bonds rated below that threshold are classified as high-yield, sometimes referred to as junk bonds, and carry a higher risk of default in exchange for higher coupon payments. This distinction shapes how bonds are priced, who buys them, and how they behave in different market conditions.

The ratings scale

Ratings are not static. Agencies review them regularly and upgrade or downgrade an issuer based on changes in financial performance, market conditions, or broader economic factors.

What are junk bonds and why do investors buy them?

“Junk bonds” is a colloquial term for bonds rated below investment grade (BB/Ba or lower). The formal term is high yield bonds, reflecting the higher coupon payments offered to compensate for elevated credit risk.

The yield premium

The case for high yield bonds is straightforward in principle. An investor willing to take on more credit risk could potentially access higher income.

The risks are equally clear. Junk bonds carry higher default risk and are more vulnerable during economic downturns. High yield bonds sit at the higher-risk end of the credit spectrum. The elevated yield reflects the increased risk carried.

Bond ladders explained

A bond ladder strategy involves purchasing bonds with staggered maturity dates rather than concentrating exposure in a single maturity. As each bond matures, the returned capital is reinvested into a new bond at the longer end of the ladder, maintaining the structure over time.

This approach addresses 2 common risks:

Interest rate risk: Exposure is distributed across maturities, reducing concentration in longer-dated bonds that are more sensitive to rate movements.
Reinvestment risk: Capital is returned at regular intervals and reinvested at prevailing market rates rather than locked in at a single point in time.

This approach can help moderate the impact of rate changes throughout the portfolio.

In summary, bond returns are shaped by coupon structure, pricing, credit quality, maturity, and market conditions. Understanding how these elements interact helps investors judge whether a yield properly reflects the risks involved.

Ways to access the bond market

Access to the bond market has evolved significantly in recent years. Investors can participate through traditional channels such as banks, brokers, and direct primary market issuance, or through regulated investment marketplace platforms that provide access to specific segments of the market.

Traditional routes involve higher minimum investments and established intermediary relationships. Investment marketplace platforms, by contrast, have lowered entry thresholds and expanded access to areas such as high-yield corporate bonds.

When evaluating bond market access, considerations might include:

Range of issuers and maturities available
Transparency around credit quality and bond seniority
Whether you can sell the bond easily before it matures
Regulatory status and investor protection framework

Investing in bonds on Mintos

Mintos is a regulated investment platform licensed by Latvijas Banka that gives retail investors access to high-yield corporate bonds.

✓ Invest your way: Hand-pick individual bonds or let an automated High-Yield Bonds portfolio do the work for you

✓ Fixed income from €50: You could start earning scheduled returns with a low minimum investment

✓ Bonds from 20+ different issuers available: Diversify across industries and companies

✓ Flexible access: Sell on the Secondary Market or request a cash out at any time, subject to demand

Frequently asked questions about bonds

What are investment bonds, explained in simple terms?

When you buy a bond, you’re lending money to a government or company in exchange for regular interest payments and the return of your capital at a set date. The return you earn depends on several factors, including the interest rate the bond pays (the coupon), the price you buy it at, and the credit risk of the issuer.

What drives bond returns beyond the coupon rate?

Bond returns include both coupon income and price return. Yield to maturity reflects the total expected return if the bond is held until bond maturity, taking into account the price paid and any capital gain or loss at repayment.

Why does bond maturity affect price volatility?

Bond maturity determines how long capital is exposed to interest rate and credit risk. Longer maturities increase sensitivity to rate changes, which can lead to larger price movements in changing market conditions.

What happens during a bond default?

A bond default occurs when an issuer fails to meet its contractual obligations. Recovery outcomes depend on bond seniority, asset backing, and restructuring negotiations, with senior bonds generally ranking ahead of subordinated bonds.

How are bond ratings explained in relation to yield?

Bond ratings explained simply indicate the assessed probability of default. Lower-rated issuers tend to offer higher yields to compensate for increased credit risk. The boundary between investment grade and junk bonds represents a significant shift in risk profile.

What is the difference between junk bonds and high yield bonds?

Junk bonds is the informal term for high yield bonds rated below investment grade. They offer higher coupon payments because they carry a higher probability of default and greater sensitivity to economic conditions.

Are bonds good during inflation?

Whether bonds are good during inflation depends on structure. Fixed-rate bonds may lose purchasing power as prices rise, while inflation-linked bonds adjust principal and coupon payments in line with inflation indices.

What is a bond ladder strategy and why is it used?

A bond ladder strategy involves holding bonds with staggered maturities. As each bond matures, capital is reinvested at prevailing rates, which may help manage reinvestment and interest rate exposure.

How can investors access the bond market today?

Investors can access the bond market through banks, brokers, or regulated platforms operating as an investment marketplace. These platforms may provide access to segments such as high yield bonds with lower minimum investments than traditional channels.

Developed by the Mintos Content Team, making investment knowledge accessible for everyday investors across Europe.

Disclaimer

This is a marketing communication and in no way should be viewed as investment research, investment advice, or recommendation to invest. The value of your investment can go up as well as down. Past performance of financial instruments does not guarantee future returns. Investing in financial instruments involves risk; before investing, consider your knowledge, experience, financial situation, and investment objectives.