What Is a Bond? A Beginner's Guide for Australians

💡 So what actually is a bond?🔗

🎯 The essential: A bond is a loan, full stop, you're the lender and the government or company is the borrower.

When a government or big company needs to raise money, it has two broad options: borrow from a bank, or borrow from investors like you. When it borrows from investors, it issues a bond. You hand over cash, they promise to pay you interest every year and return your money on a set date.

Every bond has three key features:

• Face value: the amount you lend, and the amount you get back at the end, commonly $1,000 per bond.
• Coupon rate: the annual interest rate the issuer pays you. A 5% coupon on a $1,000 bond means $50 a year.
• Maturity date: when the loan ends and your face value comes back, anywhere from a couple of years away to several decades.

Shares make you a part-owner of a company. Bonds make you a creditor. You don't share in the upside if the company booms, but you also don't get wiped out if the share price tanks.

🏛️ Government bonds vs corporate bonds🔗

Government bonds are issued by national, state or local governments to fund public spending, roads, hospitals, defence. Because stable governments like Australia's are very unlikely to default, government bonds are considered extremely low risk, and pay correspondingly lower interest rates.

Corporate bonds are issued by companies, and pay higher rates than government bonds because there's more risk involved, a company can go broke, a government rarely does. Within corporate bonds there's a spectrum too: bonds from large, stable companies (often called investment-grade) pay modest rates, bonds from smaller or riskier companies (high-yield, sometimes called "junk" bonds) pay more to compensate for the extra risk. The rule holds everywhere: higher yield means higher risk, always.

🇦🇺 Australian Government Bonds: the basics🔗

The Australian Office of Financial Management (AOFM) manages the issuance of Australian Government Bonds (AGBs) on behalf of the federal government. The market is substantial and growing, with total Australian Government Securities on issue running well above $960 billion and continuing to rise, according to the AOFM's own data, a figure that moves regularly as new bonds are issued, so it's worth checking the AOFM's data hub directly for the current total rather than treating any single number as fixed.

AGBs come in two main flavours. Treasury Bonds pay a fixed coupon every six months and return face value at maturity, the classic bond most people picture. Treasury Indexed Bonds have their face value adjusted for inflation using the CPI, so returns keep pace with the cost of living. For most beginners, Treasury Bonds are the one to understand first.

📈 How bond pricing and yield actually work🔗

🎯 The essential: When rates rise, existing bond prices fall, and vice versa, this single relationship explains most of what confuses people about bonds.

When a bond is first issued, its coupon rate and its yield are basically the same thing. Once it's trading on the market, price can move, and that's where yield becomes a separate concept: yield is the return you actually get based on what you paid, not the face value. Buy a $1,000 bond with a 5% coupon for exactly $1,000, and your yield is 5%. Buy that same bond for $900 because someone sold it cheaply, and you're still getting $50 a year, which is now a 5.56% yield on your $900. The coupon didn't change, your yield did.

This is why bond investors watch RBA rate decisions closely. If you're holding a bond ETF and the RBA raises rates, don't be surprised to see its unit price dip, that's this exact mechanism playing out.

🛡️ Why bonds matter in a portfolio🔗

If bonds pay less than shares and lose value when rates rise, why bother? Because bonds and shares often move in opposite directions. When share markets crash, investors typically flee to the safety of government bonds, demand rises, bond prices rise, and your bond holdings cushion the blow to your overall portfolio.

That's the logic behind the classic growth/defensive split: shares are your growth assets, bonds and cash are your defensive assets. A 25-year-old with a 40-year horizon probably doesn't need much bond exposure, there's time to ride out share market volatility. Closer to retirement, shifting more into bonds smooths the ride and protects capital you'll actually need to spend. We cover how to think about that split in how to build a simple investment portfolio.

Bonds also do something shares don't: pay predictable, regular income. For retirees, or anyone who needs reliable cash flow from a portfolio, that matters a lot.

🛒 How to actually buy bonds as a retail investor🔗

Buying individual bonds directly is genuinely not easy for retail investors in Australia. The old direct retail purchase facility for Australian Government Bonds closed back in 2013, and the wholesale bond market has high minimum thresholds, often $500,000 or more, mostly the domain of banks, super funds and institutions.

Two practical routes exist for everyday investors. The AOFM and ASX created exchange-traded Australian Government Bonds (eAGBs), which trade on the ASX like shares through a standard brokerage account, with minimums around $100 to $200, though the range available is limited and liquidity thinner than the sharemarket. More commonly, beginners access bonds through bond ETFs, exchange-traded funds holding a diversified basket of bonds, tradeable on the ASX with low minimums (often the price of one unit) and low ongoing fees. Some focus on government bonds only, others mix in corporate bonds, and durations vary in how sensitive they are to rate changes. If ETFs are still a new concept, our what is an ETF explainer covers the mechanics first.

One thing worth checking before assuming you have none: if you have superannuation, and if you're Australian you almost certainly do, most balanced and conservative super options already hold meaningful fixed-income exposure. Check your fund's investment option breakdown to see how much bond exposure you already carry.

❓ Frequently asked questions🔗