The Bond Market: The Complete Guide

What Is a Bond?

A bond is a loan in tradable form. When a government or company needs to raise money, it can borrow from a bank — or it can issue bonds, which means splitting the loan into thousands of identical pieces and selling them to investors in financial markets. The people who buy those pieces become the lenders, and the issuer is the borrower.

Every bond has three core features. The face value (also called par value) is the amount the issuer promises to repay when the bond matures — commonly $1,000 per bond in US markets. The coupon is the regular interest payment the issuer makes to the bondholder, usually expressed as a percentage of face value. The maturity is the date when the issuer repays the face value and the loan ends.

Suppose a government issues a bond with a face value of $1,000, a 4% annual coupon, and a 10-year maturity. That means the bondholder receives $40 every year for ten years, then gets the $1,000 back at the end. That example is hypothetical — actual rates change constantly — but the mechanics always work the same way.

Yields: The Number That Actually Matters

When a bond is first issued, its bond yield equals its coupon rate. But bonds are bought and sold every day after that, and their prices change. When the price of a bond rises above face value, the yield falls; when the price drops below face value, the yield rises. This inverse relationship is one of the most important mechanics in all of finance — and it has its own dedicated explainer at Why Bond Prices and Yields Move Opposite.

The yield that traders actually watch is the yield to maturity — the total annualized return a buyer would receive if they purchased the bond today and held it until it matured, collecting all coupon payments along the way. It accounts for the difference between the current price and the face value that will eventually be repaid. This is the number displayed on most market data pages, including live government bond yields.

Why does yield matter so much? Because it is the market's real-time verdict on the cost of borrowing. When yields rise, borrowing becomes more expensive for everyone — governments, companies, and households. When yields fall, borrowing becomes cheaper. Yields on government bonds are often described as pricing money itself.

Government vs Corporate Bonds

Not all bonds are equal. The most important distinction is between government bonds and corporate bonds — and the difference comes down to credit rating, or the assessed likelihood that the borrower will repay.

Government bonds issued by wealthy, stable nations — US Treasuries, UK Gilts, German Bunds, Japanese JGBs — are treated as the safest bonds in existence. Economists call them risk-free assets, meaning they carry essentially no risk of the borrower failing to repay (defaulting). This is not literally true for every government everywhere, but it is the working assumption that anchors the entire global financial system. The yield on a benchmark government bond — most often the US 10-year Treasury — becomes the foundation on which every other interest rate in the economy is built. Mortgages, car loans, and corporate borrowing all get priced as that risk-free rate plus some extra amount to reflect additional risk.

Corporate bonds are issued by companies. Because even large, well-run companies carry more risk than a sovereign government, they must offer higher yields to attract buyers. That extra yield above the government rate is called the credit spread. A company with a strong balance sheet and a high credit rating — known as investment grade — will have a narrow spread. A riskier company with a lower rating will have a wider spread and must pay meaningfully more to borrow. The riskiest corporate bonds are sometimes called high-yield bonds — an older name for them is "junk bonds." For more on how ratings and spreads work, see Credit Ratings and Spreads.

There are also bonds issued by regional governments, government agencies, and supranational bodies like the World Bank, all sitting somewhere on the spectrum between pure sovereign debt and fully corporate risk.

The Government Bond Market as the Anchor

The government bond market does something nothing else in finance does: it provides the benchmark — the risk-free reference rate — that prices nearly every other financial asset. When the yield on the US 10-year Treasury moves, it ripples outward. Mortgage rates shift. Corporate borrowing costs adjust. Stock valuations are recalculated. Even currencies react.

This is why economists, central bankers, and traders around the world watch government bond yields more closely than almost any other number. The 10-year yield in particular is treated as the single best summary of where markets expect interest rates and inflation to settle over the medium term. You can read more about its role at Government Bond Yields: The 10-Year Benchmark.

The US Treasury market is also the largest and most liquid bond market in the world. Liquidity here means there are always buyers and sellers, trades happen in enormous size without moving the price dramatically, and the market operates around the clock. This depth is part of why the US dollar and US Treasuries are both considered safe-haven assets — in times of global stress, money historically flows into them, not out.

The bond market is often described as larger than the global stock market when measured by total outstanding debt. This reflects the fact that virtually every government, most large companies, and many financial institutions borrow through bonds continuously.

The Yield Curve: Reading the Whole Picture

Bonds come in different maturities — from a few weeks to 30 years or longer. A 3-month Treasury bill and a 30-year Treasury bond are both US government debt, but their yields are almost always different. The yield curve is simply the line you get when you plot yields from the shortest to the longest maturities all at once.

Normally, the yield curve slopes upward: longer maturities carry higher yields because locking money up for longer involves more uncertainty. When that shape flips — when short-term yields rise above long-term yields — it is called an inverted yield curve. Historically, inversions have often appeared before recessions, which is why they attract intense attention from economists and market participants. The full story is at The Yield Curve, Explained.

The shape of the yield curve tells a story about what the market collectively expects for growth, inflation, and central bank policy. A steep upward curve often signals expectations of stronger growth ahead. A flat or inverted curve signals caution or anticipated rate cuts. Traders typically watch these shapes as leading indicators of economic direction.

What Moves Bond Prices and Yields

Several forces push bond yields up or down — and because price and yield move in opposite directions, any force that raises yields is simultaneously pushing bond prices lower.

• Inflation expectations. Bonds pay fixed coupons, so rising inflation erodes their real value. When inflation expectations rise, investors demand higher yields to compensate, pushing prices down.
• Central bank policy. Central banks set short-term policy rates, which anchor the short end of the yield curve directly. When a central bank like the US Federal Reserve raises rates, short-term bond yields typically follow. Longer-term yields are more influenced by expectations about where rates will go over time.
• Economic growth. Strong growth tends to push yields higher because it raises both inflation expectations and demand for credit. Weak growth or recession fears typically push yields lower as investors seek safety and central banks are expected to cut rates.
• Supply and demand. Governments issue new bonds regularly through auctions. When a lot of new supply hits the market, existing bond prices can fall (yields rise) unless demand keeps pace. Central bank bond-buying programs — known as quantitative easing — add large amounts of demand, which historically pushed yields lower.
• Credit quality changes. For corporate and lower-rated sovereign bonds, a change in credit rating or a shift in investor confidence can widen or narrow spreads rapidly, moving prices independently of what government yields are doing.

Bonds in the Wider Financial System

Bond yields do not stay isolated on a bond trader's screen — they connect to almost every corner of financial markets. When long-term bond yields rise sharply, the discount rate used to value future corporate earnings rises too, which tends to push stock prices lower. This is one of the core channels linking bond markets and equity markets, and it is part of the reason that a sudden move in the 10-year Treasury yield can trigger movement across stocks, currencies, and commodities simultaneously.

Bonds also interact with currencies. Higher yields in one country tend to attract capital from abroad, increasing demand for that country's currency. Traders watch interest rate differentials — the gap between yields in two countries — to understand currency pressure. This dynamic runs through the forces that move exchange rates and is central to strategies like the carry trade.

For a real-time view of where government bond yields stand across major economies, the bonds page shows live 10-year yields alongside day, week, and month percent-change columns — a practical way to see which direction markets are moving without needing to interpret raw levels alone. For help reading those percentage columns, see Day, Week, YTD, YoY: Reading Percentage Moves.

The bond market is the foundation. Equities get more headlines, crypto gets more drama, and commodities feel more tangible — but the bond market is where the price of money is set, and that price runs underneath everything else.