Treasury Bonds vs. Corporate Bonds: Key Differences
Both pay you interest for lending money — but a U.S. Treasury bond and a corporate bond carry very different levels of risk and reward.
Two different borrowers
A bond is only as good as the promise behind it, and the identity of the borrower is the biggest factor in how that promise is priced. A Treasury bond is issued by the U.S. federal government, funded by its ability to tax and, if needed, borrow further. A corporate bond is issued by a company, backed only by that company's own revenue and assets. Those are very different guarantees.
Why Treasuries are the reference point
U.S. Treasury securities are widely treated as the closest thing to a risk-free investment in dollar terms, since the U.S. government has an extremely strong track record of making its bond payments. Because of that reliability, Treasury yields are commonly used as the baseline, or "risk-free rate," against which every other investment's expected return gets compared. Treasuries come in a few forms depending on maturity: Treasury bills (under a year), notes (2 to 10 years), and bonds (20 to 30 years).
Why corporate bonds pay more
A company can go bankrupt in a way a currency-issuing government generally cannot. To compensate investors for taking on that added default risk, corporate bonds have to offer a higher yield than a Treasury bond of similar maturity — otherwise, no rational investor would choose the riskier option. The extra yield a corporate bond pays above a comparable Treasury is called its credit spread, and that spread widens when investors grow more worried about defaults, and narrows when confidence improves.
- A financially strong, well-established company can often borrow at a spread only slightly above Treasuries.
- A smaller or financially strained company has to offer a much wider spread to attract lenders.
- Credit spreads tend to widen across the board during economic downturns, even for healthy companies, as investors become more risk-averse generally.
Reading a credit rating
Independent agencies — Moody's, S&P Global, and Fitch are the best known — assign letter-grade credit ratings to bonds based on the issuer's ability to repay. Ratings from AAA down to BBB-, or the equivalent, are generally called "investment grade," reflecting relatively low default risk. Anything below that threshold is often called "high yield," or more bluntly "junk" — not necessarily a bad investment, but one that requires accepting meaningfully more default risk in exchange for a higher stated yield.
A credit rating is an informed opinion about default risk, not a guarantee. Ratings can and do change, sometimes after the market has already moved.
Where each fits in a portfolio
Treasuries are often used for capital preservation and as a stabilizing counterweight to stocks, since they tend to hold up, or even gain, when stock markets fall sharply. Corporate bonds sit further along the risk spectrum, offering higher expected income in exchange for taking on both interest-rate risk and credit risk. Many bond index funds blend both, giving investors a diversified mix rather than requiring them to pick individual issuers.
This article is educational and general in nature. It isn’t personalized investment, tax, or legal advice — always weigh your own circumstances, or talk to a licensed professional, before making financial decisions.