Why Some Bonds Pay More: Understanding The Risk-Return Tradeoff

I'm Andy Temte and welcome to Money Lessons! Join me every Saturday morning for bite-sized lessons that are designed to improve financial literacy around the world. Today is January 31, 2026.

Last week, we explored the different ways to measure yield—nominal yield, current yield, yield to maturity, and yield to call. We discovered that comparing the right yields is essential for evaluating bond investments. But here's the question we haven't answered yet: why do different bonds offer different yields in the first place?

Today, we're exploring the landscape of bond types—from the safest government securities to the riskiest corporate debt—and discovering how the bond market prices risk.

The Risk-Free Benchmark: Treasury Bonds

Every discussion of bond yields starts with U.S. Treasury securities—bonds issued by the federal government. Treasuries are considered the safest bonds in the world because they're backed by the "full faith and credit" of the United States government. The government can always raise taxes or, in extreme circumstances, print money to pay its debts.

This perceived safety makes Treasury yields the benchmark against which all other bonds are measured. When financial professionals discuss the "risk-free rate," they're referring to Treasury yields. When you hear on the news that "the 10-year Treasury is yielding 4.5%," that's the baseline return investors can earn with virtually no credit risk—no concern that the borrower won't pay. Importantly, this represents the risk-free rate for a 10-year investment horizon. Different maturities have different risk-free rates—a 2-year Treasury will have a different yield than a 30-year Treasury, reflecting varying market conditions over those time periods. We’ll discuss this more in future episodes when we introduce the concept of the ‘term structure’ of bond interest rates.

But here's the trade-off: safety comes at a price. Because Treasuries carry minimal risk, they offer relatively low yields. Investors willing to accept more risk can earn higher returns elsewhere.

Corporate Bonds and Credit Spreads

When corporations borrow money by issuing bonds, investors face a risk Treasury investors don't: the company might fail to pay. A corporation can go bankrupt. Its profits can disappear in challenging market conditions or times of poor strategic execution. Unlike the government, it can't print money to cover its debts.

To compensate for this additional risk, corporate bonds must offer higher yields than Treasuries. The difference between a corporate bond's yield and a Treasury bond's yield of similar maturity is called the credit spread.

Necessary financial jargon alert! Bond professionals express credit spreads in basis points rather than percentages. One basis point equals one-hundredth of a percentage point, so 100 basis points equals 1 percent.

Why bother with basis points? Because bond yields move in small increments. Saying a spread "widened by 25 basis points" is clearer than saying it "widened by 0.25 percentage points."

Historically, investment-grade corporate bonds—those with strong credit ratings—have offered yields averaging about 130 basis points (1.3 percent) above comparable Treasuries. If a 10-year Treasury yields 4.5%, an investment-grade corporate bond might yield around 5.8%.

Investment Grade Versus High Yield

Not all corporate bonds carry the same risk. Credit rating agencies—Moody's, Standard & Poor's, and Fitch—evaluate bond issuers and assign ratings that help investors assess creditworthiness. We introduced these agencies back in our December 27th episode on corporate bonds.

A critical dividing line separates investment grade from high yield:

• Investment grade: Bonds rated BBB- or higher by S&P and Fitch, or Baa3 or higher by Moody's. These companies have adequate financial strength to meet their obligations under normal economic conditions.

• High yield: Bonds rated BB+ or lower by S&P, or Ba1 or lower by Moody's. You might also hear these called "junk bonds," though that term has fallen out of favor. These bonds come from companies with weaker finances, higher debt loads, or less stable cash flows.

High-yield bonds offer substantially higher yields to compensate for their elevated risk. While investment-grade spreads average around 130 basis points, high-yield spreads have historically averaged about 450 basis points (4.5 percent) above Treasuries—and can range much higher during times of economic uncertainty.

If that same 10-year Treasury yields 4.5%, a high-yield corporate bond might yield 9% or more. That extra return sounds attractive, but it comes with significantly higher risk of default.

Municipal Bonds: A Tax Advantage

Municipal bonds—"munis" for short—are issued by state and local governments to finance public projects like schools, highways, and water systems. They occupy a unique position in the bond market because of one crucial feature: their interest payments are typically exempt from federal income tax. And in some states, municipal bond interest is also exempt from state taxation.

This tax exemption changes how investors should evaluate municipal yields. A muni yielding 3.5% might actually provide more after-tax income than a taxable bond yielding 4.5%, depending on your tax bracket.

To compare fairly, investors calculate what's called tax-equivalent yield—the yield a taxable bond would need to offer to match a muni's after-tax return. For investors in high tax brackets, municipals can offer compelling value despite their lower stated yields.

The Risk-Return Spectrum

Picture the bond market as a spectrum running from lowest risk to highest:

• Treasury bonds: Lowest risk, lowest yield—the benchmark against which everything else is measured.

• Investment-grade corporates and most municipal bonds: Modestly higher yields for modestly higher risk.

• High-yield bonds: Significantly higher yields but with meaningfully elevated default risk.

This relationship between risk and return is fundamental to all investing, not just bonds. Greater potential reward requires accepting greater risk. There's no free lunch—you can't earn high-yield returns with Treasury-level safety.

Understanding where different bonds fall on this spectrum helps you make informed choices. A conservative investor nearing retirement might favor Treasuries and investment-grade corporates. A younger investor with decades to recover from setbacks might allocate some portion to high-yield bonds.

What Determines the Spread?

We've established that riskier bonds must offer higher yields. But what determines exactly how much higher? Why does one corporate bond yield 150 basis points above Treasuries while another yields 500?

The answer lies in credit analysis—the detailed evaluation of a borrower's ability to repay. Next week, we'll explore how credit ratings work, what causes ratings to change, and why understanding credit risk is essential for bond investors.

Until next week...

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