What are bonds?
A plain-English guide to lending money to governments and companies.
By Kenny Goodrich, Founder of Money Masters MediaA bond is one of the oldest and most common ways to invest. At its simplest, it is a loan. You lend money to a government or a company, and in return they agree to pay you interest and return your money on a set date. Bonds sit alongside stocks and cash as one of the main building blocks of a portfolio. This guide explains what bonds are, why they exist, how their prices and yields move, and how investors often use them inside a diversified mix.
What are bonds?
A bond is essentially an IOU. When a government or a company needs to raise money, one option is to borrow it from investors by issuing bonds. Each bond is a promise to pay the lender regular interest for a period of time, then return the original amount on a set date. In exchange for lending, the investor collects that interest along the way.
In the United States, the most widely watched bonds are Treasuries, which are issued by the federal government. You can follow their yields and the shape of the yield curve on the Treasury Tracker. Bonds are often grouped under the term fixed income, because the interest they pay is usually set in advance.
Why bonds exist
Governments and companies often need more money than they have on hand. A government may fund roads, schools, or day-to-day spending. A company may build a factory, expand, or refinance older debt. Borrowing from many investors at once, through bonds, can be cheaper and more flexible than other ways of raising money.
For the investor, the appeal is the other side of that deal. In return for lending, you receive a stream of interest payments and, all being well, your money back at the end. That is why bonds have long been a core holding for people who want income and a steadier counterweight to stocks.
How bonds work
Three words cover most of how a bond works. The face value is the amount the issuer agrees to repay at the end. The coupon is the interest rate the bond pays, usually once or twice a year. The maturity is the date when the loan ends and the face value is returned.
Put together, a simple bond might pay a fixed amount of interest every year for several years, then hand back the original amount on the maturity date. Until that date arrives, the bond can be bought and sold, and its price can drift above or below the face value depending on what is happening with interest rates.
Bond prices and bond yields
The idea that surprises most beginners is that the price of a bond and its yield move in opposite directions. The yield is roughly the return you earn if you buy the bond at its current price and hold it. When one goes up, the other tends to go down.
When rates rise, prices fall
If newly issued bonds start paying more interest, an older bond that pays less becomes less appealing. To sell it, the owner has to accept a lower price. So a rise in rates tends to push the prices of existing bonds down.
When rates fall, prices rise
If new bonds are issued paying less interest, an older bond that pays more looks better by comparison. Buyers will pay extra for it, so its price tends to climb. Falling rates tend to lift the prices of existing bonds.
This seesaw only matters if you sell before maturity. If you hold a healthy bond to the end, you still collect the agreed interest and face value, whatever the price did along the way.
Government bonds vs corporate bonds
Bonds are often sorted by who issues them, because that says a lot about how risky they are and how much interest they tend to pay.
Government bonds
Issued by national governments to fund spending. In the United States these are Treasuries, and because they are backed by the government they are treated as among the safest bonds available, though their prices still move.
Corporate bonds
Issued by companies to raise money. They usually pay more interest than government bonds to make up for the higher chance that the borrower runs into trouble. More income, in exchange for more risk.
As a rule of thumb, the more risk a lender takes on, the more interest they expect in return. That is why a shaky borrower has to offer a higher yield than a rock-solid one.
How interest rates affect bonds
Interest rates are the single biggest force acting on bonds. The general level of rates is heavily influenced by the Federal Reserve, which sets a key short-term rate as part of steering the economy. When that level moves, the whole bond market feels it.
When rates rise, newly issued bonds pay more, so older bonds that pay less drop in price to stay competitive. When rates fall, older higher-paying bonds become more valuable. For a closer look at why rates move in the first place, read How Interest Rates Work.
Why investors own bonds
Stocks tend to get the attention, but bonds quietly do important jobs in a portfolio. Most of those jobs come down to three things.
Steady income
Bonds are built to pay regular interest, which gives a portfolio a more predictable stream of income that does not depend on a stock rising in price.
Ballast in a downturn
High-quality bonds have often held their value, or even risen, when stocks fall. That steadiness can cushion a portfolio during rough stretches, though it is not guaranteed.
Diversification
Because bonds and stocks do not always move together, holding both can smooth out the ride. Bonds are a common way to add balance to a stock-heavy mix.
Bonds within asset allocation
Bonds rarely make up a whole portfolio on their own. They are usually one slice of a wider mix that also holds stocks and cash. How big that slice should be depends on your goals, your comfort with risk, and how long until you need the money.
A common pattern is to lean more on stocks when the time horizon is long, and to hold more bonds and cash as that horizon shortens. To see how the slices fit together and shift over time, read Asset Allocation Basics.
Risks of bond investing
Bonds are often called safe, and high-quality ones are certainly steadier than stocks. Even so, a bond can lose value, and it helps to know the main ways that happens. Notably, even a government bond can lose ground in real terms once inflation is taken into account.
Interest rate risk
When rates rise, the prices of existing bonds tend to fall. If you need to sell before the bond matures, you could get back less than you paid, even with a safe government bond.
Credit risk
A bond is only as reliable as the borrower behind it. A company, or in rare cases a government, can fail to pay interest or return the money. Higher-yielding bonds usually carry more of this risk.
Inflation risk
Because most bonds pay a fixed amount, rising prices can quietly reduce what that income will buy. Inflation is one of the main reasons a bond can feel safe yet still lose ground in real terms.
In downturns, investors often move toward high-quality bonds for safety, one of the patterns covered in Recession Indicators and the Economic Outlook Tracker.
What beginners should understand
Bonds are a useful and well-tested building block, but a few honest points are worth keeping in mind before leaning on them.
Safer does not mean risk free
Bonds are generally steadier than stocks, but steadier is not the same as guaranteed. Prices move, borrowers can disappoint, and inflation can erode what you earn.
The type matters a lot
A short-term Treasury and a long-term corporate bond behave very differently. Who is borrowing, and for how long, matters far more than the single word bond on the label.
Most people use funds
Rather than buying individual bonds, many investors hold bond funds that own hundreds at once. It is a simpler way to spread the risk across many borrowers.
How this connects to Money Masters tools
Bonds respond to interest rates, inflation, and the wider economy, so it helps to watch those things in one place. These free Money Masters tools and guides break it down in plain English. Start with the Dashboard to see markets and the economy on one screen.
See where bonds fit
Bonds make the most sense in context, next to rates, inflation, and the rest of your mix. These free tools and guides track the market, rates, and the economy together, with no jargon and no hype.
Frequently asked questions
What is a bond?
A bond is essentially a loan. When you buy one, you are lending money to a government or company in exchange for regular interest payments and the return of the original amount on a set date. Bonds are often grouped under the term fixed income because the interest they pay is usually set in advance.
Why do bond prices and yields move in opposite directions?
When newly issued bonds start paying more interest, an older bond that pays less becomes less appealing, so its price has to fall for a buyer to accept it, which lifts its yield. The reverse happens when rates fall: older higher-paying bonds become more valuable, so their prices rise and their yields drop.
What is the difference between government bonds and corporate bonds?
Government bonds are issued by national governments, and in the United States these Treasuries are treated as among the safest bonds available. Corporate bonds are issued by companies and usually pay more interest to make up for the higher chance the borrower runs into trouble, so they offer more income in exchange for more risk.
Are bonds safe?
High-quality bonds are generally steadier than stocks, but steadier is not the same as risk free. Their prices move as interest rates change, a borrower can fail to pay, and because most bonds pay a fixed amount, inflation can quietly reduce what that income will buy.
How do interest rates affect bonds?
Interest rates are the single biggest force acting on bonds, and the general level of rates is heavily influenced by the Federal Reserve. When rates rise, newly issued bonds pay more, so older bonds that pay less drop in price to stay competitive; when rates fall, older higher-paying bonds become more valuable.
Educational content only: This guide is for education and general information, not financial, investment, or tax advice, and not a recommendation to buy or sell any security, bond, or fund, or to follow any particular investing strategy. Investing carries risk, including the possible loss of money you put in. Always do your own research and consider speaking with a licensed financial professional before making decisions.
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