A bond is essentially a loan you make to a government or company. In return, they pay you regular interest and promise to repay the amount at the end of the term. Bonds and similar fixed income sit between cash and shares: steadier than shares, with more return than cash, and they play a useful role in balancing a portfolio.
Government bonds are generally the safest, since governments are reliable borrowers. Company bonds pay a higher interest rate to compensate for the greater risk that the company could struggle to repay. More risk, more return is the usual trade-off.
This catches people out. If you hold a bond paying a fixed rate and market interest rates rise, new bonds pay more, so your older, lower-paying bond becomes less attractive and its price falls. If rates fall, your higher-paying bond becomes more valuable. Prices and rates move in opposite directions.
| Risk | What It Means |
|---|---|
| Interest rate risk | Prices fall when rates rise |
| Credit risk | The issuer may fail to pay |
| Inflation risk | Fixed interest may not keep pace with prices |
If you hold a bond to maturity and the issuer pays, you receive the agreed interest and your principal back. If you sell before maturity, you get the market price, which may be more or less than you paid depending on where rates have moved.
Bonds provide regular income and tend to be steadier than shares, so they cushion a portfolio. When shares fall, a bond allocation can soften the overall drop, which is why more conservative investors and retirees often hold more bonds.
A common idea is to hold more shares when you are young and have time, and more bonds as you approach needing the money, for steadier income and less volatility. This mirrors how KiwiSaver funds shift from growth to conservative.
Most people get bond exposure through a fund or a balanced KiwiSaver fund, rather than buying individual bonds, which gives diversification and removes the work of choosing issuers. See our Index Funds and ETFs guide.
Bond prices fall when rates rise. They are steadier than shares but not risk-free.
A bond paying a very high rate usually carries higher risk of the issuer not paying. The extra yield is compensation for that risk.
Fixed interest can be eroded by inflation, so the real return may be lower than the headline rate suggests.
With decades to invest, an all-bond portfolio may miss the growth that shares provide. Match the mix to your timeframe.
See our Risk and Return and Diversification guides. Final word: bonds are loans that pay regular interest and return your principal at maturity, sitting between cash and shares for risk and return. Their prices move opposite to interest rates, and they add income and stability to a portfolio. Most people hold them through a fund. This is general information, not financial advice.
Quiz on Bonds and Fixed Income (20 Questions)
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