A stock makes you an owner. A bond makes you a lender. When you buy a bond, you're lending money to a government or a company. In return, they promise two things: regular interest payments along the way, and your money back on a set date.
That's the whole idea. No ownership, no vote, no share of the profits. Just a loan with a schedule attached. If the borrower's business triples, you don't get a penny more than promised. If it stumbles, you still get paid — as long as it can pay at all. Lenders stand ahead of shareholders in line, which is a big part of why bonds are usually calmer than stocks.
Calmer doesn't mean risk-free. Bonds have their own ways of losing money, and we'll get to them. But the starting picture is simple: you hand over cash, you collect interest, and one day you get the cash back.
Every bond comes with three numbers worth knowing.
Face value is the amount repaid at the end — often $1,000 per bond. It's also called par value.
The coupon is the interest rate the bond pays on that face value. A 4% coupon on a $1,000 bond means $40 a year, usually paid in two $20 installments. The name is a fossil: bonds were once paper certificates with little coupons you clipped off and mailed in to collect your interest.
Maturity is the date the loan ends and the face value comes back. It might be one year away or thirty. Longer maturities usually pay more, because a lot can happen in thirty years, and lenders want to be paid for that uncertainty.
So a 10-year, 4% bond bought at $1,000 works like this: $40 a year for ten years, then your $1,000 back. Total interest collected: $400. Predictable — which is exactly the point.
Here's the part that confuses almost everyone, so let's do it with numbers.
Bonds trade after they're issued, and their prices move. Say you own that $1,000 bond paying a $40 coupon — a 4% yield. Now imagine interest rates rise, and new bonds pay 5%. Who would pay $1,000 for your 4% bond when a fresh 5% one costs the same? Nobody. To sell yours, you'd have to cut the price. At roughly $800, your fixed $40 coupon works out to $40 divided by $800, which is 5% — now it competes.
Run it the other way: if new bonds pay only 3%, your $40 coupon is a prize. Buyers might pay around $1,333, because $40 divided by $1,333 is about 3%.
That's the seesaw: rates up, bond prices down. Rates down, bond prices up. The real math also depends on how many years remain, so short-term bonds swing less than long-term ones. But the direction never changes, and it's the single most useful fact in all of bond investing.
Bonds come in a few main flavors, sorted mostly by who's borrowing.
Government bonds are loans to a national government — U.S. Treasuries or Government of Canada bonds. These are considered about the safest promises in each country, since governments collect taxes and, in a pinch, print their own currency. Safety comes with lower yields.
Provincial, state, and municipal bonds fund provinces, states, and cities. A notch more risk, usually a notch more yield.
Corporate bonds are loans to companies. Strong, established companies issue investment-grade bonds. Shakier borrowers issue high-yield bonds — politely named, but the older term is junk bonds. They pay more because the chance of not being paid back is real.
Credit rating agencies grade borrowers from AAA on down, like a report card for reliability. Most beginners don't buy individual bonds at all. Bond funds and ETFs bundle hundreds of them into one purchase, spreading the lending risk the same way a stock index fund spreads ownership risk.
Bonds are steadier than stocks, but they're not bulletproof. Three risks do most of the damage.
Interest rate risk is the seesaw from earlier. When rates jumped in 2022, broad bond funds had one of their worst years on record — down double digits. People who thought bonds couldn't fall learned otherwise.
Credit risk is the plain one: the borrower might not pay. Companies default. Even cities have. This is what those credit ratings try to measure, and it's why junkier bonds pay more.
Inflation risk is the quiet one. If your bond pays 4% and inflation runs 5%, your money grows on paper while shrinking in what it can buy. Fixed payments are a promise about dollars, not about groceries.
One comfort: if you hold a quality individual bond to maturity, price swings along the way don't bind you — you still collect the coupons and the face value at the end, provided the borrower stays solvent. The seesaw only hurts if you sell mid-ride.
If stocks usually earn more over the long run, why bother with bonds? Three honest reasons.
They smooth the ride. Bonds tend to swing less than stocks, and in many stock crashes, quality government bonds have held their value or even risen while everything else fell. A mix of both makes the bad years less brutal — which makes you likelier to stay invested through them. It's not a law of nature, though: 2022 saw stocks and bonds fall together.
They pay you on a schedule. Coupons arrive whatever the market's mood, which retirees and cautious savers appreciate.
They match short horizons. Money you'll need in three to five years has no business riding out a 40% stock drawdown. Bonds sit in the middle ground between a savings account and the stock market.
A classic starting mix is more stocks when you're young and more bonds as your goals get closer. Testing different stock-bond mixes against decades of market history is a grounded way to see how each blend actually behaved — in the crashes, not just the averages.
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