A bond is a loan you make to a government or company. You hand over money for a set period; the issuer typically pays you interest along the way (the coupon) and returns the original amount (the face value) at maturity. Bonds are generally less volatile than stocks, but they are not risk-free: the issuer can default, and bond prices fall when interest rates rise.
Not financial advice. This is general educational content — not personalized investment or tax advice, and no recommendation of any specific bond, issuer, or fund. Examples are illustrative. Past performance does not indicate future results, all investing carries risk including loss of principal, and tax treatment and product availability vary by country. Consider speaking with a licensed financial adviser about your situation.
What is a bond, in plain language?
Buying a stock makes you a part-owner of a company. Buying a bond makes you a lender — you are buying a contractual promise to be paid back on a schedule. Four terms cover most of what you need:
- Face value (or par) — the amount repaid at the end, often 1,000 units of currency per bond.
- Coupon — the interest rate the issuer promises, usually paid once or twice a year. A 4% coupon on a 1,000 face value pays 40 a year, whatever the market price does.
- Maturity — when the face value is repaid. Short-term is roughly under three years; long-term can run decades.
- Yield — what you actually earn given the price you paid. If you buy a bond below face value, your yield is higher than the coupon; buy above face value and it is lower.
That last distinction trips up nearly everyone new to bonds: the coupon is fixed at issue, but the yield moves because the price you pay moves. The investing basics guide sets out how bonds sit alongside stocks and funds.
Why do bond prices fall when interest rates rise?
This is the single most useful mechanic to understand, and it is pure arithmetic rather than market sentiment.
Imagine you hold a bond paying a 3% coupon and new bonds are then issued paying 5%. Nobody will buy your 3% bond at full price when a better-paying alternative exists, so its market price drops until the yield for a new buyer is competitive. Rates up, existing bond prices down — and the reverse if rates fall. Two consequences follow:
- If you hold an individual bond to maturity, day-to-day price moves are largely academic — barring default, you still get the coupons and face value back.
- Longer maturities swing harder. A bond locked in for 20 years is exposed to that rate gap far longer than a 2-year bond, so the same rate move produces a bigger price change. This sensitivity is called duration.
Nobody reliably predicts where rates go next, and this guide does not try. What you can know is which way your holding moves, and roughly how far.
What are the main types of bonds?
Categories vary by country, but the broad families are similar everywhere.
| Type | Who is borrowing | General credit-risk profile | Typical use case |
|---|---|---|---|
| Government bonds | National governments | Lowest in a stable currency and economy | Ballast and capital preservation |
| Government agency / municipal | Sub-national or agency issuers | Low to moderate | Sometimes tax-advantaged locally |
| Investment-grade corporate | Financially stronger companies | Moderate | More income than government debt |
| High-yield ("junk") corporate | Weaker-credit companies | Higher — meaningful default risk | Higher income, more equity-like risk |
| Inflation-linked bonds | Usually governments | Similar to that government's debt | Payments track an inflation measure |
| Bond funds and bond ETFs | A basket of many bonds | Depends on holdings | One-purchase diversification |
The pattern across the table: higher promised income generally means the market perceives more risk. A bond offering conspicuously more than similar bonds is not a bargain nobody noticed — it is compensation for something. Ratings agencies grade credit quality, but ratings are opinions, not guarantees.
What risks do bonds carry?
Calling bonds "safe" flattens several distinct risks:
- Credit (default) risk — the issuer cannot pay. Real for companies and, in some cases, governments.
- Interest-rate risk — rising rates push down the market value of what you already hold.
- Inflation risk — a fixed coupon loses purchasing power if inflation runs above it. The quietest threat to long-term bond holders.
- Liquidity risk — some bonds are hard to sell quickly at a fair price.
- Currency risk — a foreign-currency bond adds exchange-rate movement on top.
- Call risk — some bonds can be repaid early by the issuer, ending your income stream.
None of this makes bonds bad. It explains why they are discussed as a complement to stocks rather than a replacement, and why building a diversified portfolio means holding assets that behave differently from one another.
Individual bonds or bond funds?
Both routes exist and they behave differently in practice.
Individual bonds give a defined outcome: a known coupon and a known repayment date, assuming no default. That certainty suits a dated goal. The trade-off is practical — meaningful diversification takes many bonds and therefore real capital, and minimum purchase sizes can be high.
Bond funds and bond ETFs hold hundreds or thousands of bonds in one purchase, so a single default is a scratch rather than a wound, and they are easy to buy in small amounts. The trade-off: a fund has no maturity date, so there is no guaranteed day you get a specific amount back. Its value simply moves with the market — and with rates.
Neither is superior. A defined date and amount favours individual bonds; simplicity, small sums, and broad diversification favour funds.
How do you compare bonds or bond funds? A checklist
Run through these before committing money to this asset class:
- What is the job of this money? Short-term stability, income, or diversification? That drives maturity length more than anything else.
- Who is the borrower, and how creditworthy? Understand what any extra yield is compensating for.
- Does the maturity match your horizon? Longer maturities are more rate-sensitive. Check a fund's average duration.
- What is the yield, and how is it quoted? Yield to maturity accounts for the price you pay; the coupon alone does not.
- What does it cost to own? Expense ratio for funds; dealer spreads and platform fees for individual bonds. Costs compound against you.
- What currency is it in? Foreign-currency bonds carry exchange-rate risk on income and principal.
- How is it taxed where you live? Bond interest is often taxed differently from capital gains, and rules vary by country — verify locally.
- Can you sell it if plans change? Liquidity differs enormously between a major government bond and an obscure corporate issue.
FAQ
Are bonds a safe investment?
Bonds are generally less volatile than stocks, but "safe" overstates it. You still face default risk, interest-rate risk, inflation eroding fixed payments, and currency risk on foreign bonds. Government bonds in a stable currency sit at the lower-risk end; high-yield corporate bonds carry substantially more. No investment is risk-free, and returns are never guaranteed.
Can you lose money on bonds?
Yes. If an issuer defaults you may recover only part of your money, or none. If you sell before maturity after rates have risen, you can sell for less than you paid. Bond funds have no maturity date, so their value moves with the market indefinitely. Even held to maturity, inflation can leave the repaid amount worth less in real purchasing power.
What happens to bonds when interest rates rise?
Existing bonds become less attractive than newly issued ones paying more, so their market prices fall until yields are competitive. Longer-maturity bonds fall further. If you hold an individual bond to maturity and it does not default, you still receive the coupons and face value — the price change matters most if you sell early or hold a bond fund.
How much of a portfolio should be in bonds?
There is no universal answer, and anyone giving a number without knowing your circumstances is guessing. Allocation depends on time horizon, goals, income stability, and tolerance for volatility. Longer horizons have more capacity to absorb equity swings. A licensed financial adviser can assess your position, and retirement planning covers how horizon shapes these decisions.
Are bond funds better than individual bonds?
Neither is better in general. Individual bonds give a known repayment date and amount if held to maturity without default, which suits dated goals — but diversifying properly requires substantial capital. Bond funds offer broad diversification in one small purchase, at the cost of no maturity date or guaranteed return of a set amount.
Bonds are less glamorous than stocks and more useful than their reputation suggests. Once you see past the vocabulary — coupon, maturity, yield, duration — they become a straightforward instrument with nameable trade-offs. Understand the mechanics, decide what job the money is doing, then look at where you would hold it, since the account type and platform shape both costs and available choices. This is educational material, not personalized advice; weigh your own circumstances or consult a licensed financial adviser before acting. For more jargon-free explainers on how markets and money work, explore TopInvestors.
