Treasury Bond
Key Takeaways
- Treasury bonds are long-term (20-30 year) debt securities issued by the U.S. government
- Considered the safest investment in the world — backed by the full faith of the U.S.
- Their yields serve as the risk-free rate benchmark for all other investments
- Prices move inversely to interest rates
Definition
Treasury bonds (T-bonds) are long-term debt securities issued by the U.S. Department of the Treasury with maturities of 20 or 30 years. They pay semi-annual interest (coupon) payments and return the face value (par value) at maturity. U.S. Treasury securities are considered the safest investments in the world because they are backed by the full faith and credit of the U.S. government.
The broader Treasury securities family includes Treasury bills (T-bills, maturities under 1 year), Treasury notes (T-notes, 2-10 years), and Treasury bonds (T-bonds, 20-30 years). Treasury Inflation-Protected Securities (TIPS) are a special category that adjusts for inflation.
Treasury yields serve as the risk-free rate in financial theory — the baseline return investors can earn without taking credit risk. All other investments are priced relative to Treasury yields, with the spread reflecting the additional risk (credit, liquidity, etc.) of those investments.
How It Works
Treasuries are sold at auction by the Treasury Department. Investors can buy them directly through TreasuryDirect.gov or through brokers. The coupon rate is fixed at issuance, and interest is paid semi-annually. At maturity, the bondholder receives the face value ($1,000 per bond).
Treasury prices and yields move inversely. When interest rates rise, existing Treasury prices fall (because new bonds offer higher yields, making older bonds less attractive). When rates fall, existing Treasury prices rise. Longer-maturity bonds are more sensitive to rate changes — a 30-year bond's price moves much more than a 2-year note's for the same rate change.
The yield curve plots Treasury yields across different maturities. Under normal conditions, longer maturities offer higher yields to compensate for the greater risk of holding bonds for extended periods. An inverted yield curve (short-term yields above long-term) has historically been a reliable predictor of recessions.
Example
An investor buys a 30-year Treasury bond with a 4.5% coupon at par ($1,000). They receive $22.50 every six months ($45 annually) for 30 years and get $1,000 back at maturity. If interest rates rise to 5.5% a year later, the bond's market price falls to approximately $840 (a 16% decline) because new bonds offer higher yields. If rates fall to 3.5%, the price rises to approximately $1,190 (a 19% gain). This demonstrates the interest rate risk of long-duration bonds.
Why It Matters
Treasury bonds are the foundation of the global financial system. Their yields influence mortgage rates, corporate borrowing costs, stock valuations, and currency markets. The 10-year Treasury yield is arguably the single most important number in finance — it is used as the discount rate in stock valuation models, the benchmark for mortgage rates, and the reference point for all credit spreads.
For investors, Treasuries serve as a safe haven during market stress. In the 2008 financial crisis and the March 2020 COVID crash, investors fled to Treasuries, pushing prices up and yields down. This flight-to-safety behavior makes Treasuries an important diversification tool in portfolios.
Advantages
- Safest investment available — zero credit risk from U.S. government
- Predictable income stream through semi-annual coupon payments
- Highly liquid — the Treasury market is the most liquid bond market globally
- Provide portfolio diversification and safe-haven protection during crises
Limitations
- Returns are lower than stocks over long periods
- Long-duration bonds suffer significant price declines when rates rise
- Returns may not keep pace with inflation in some environments
- Interest income is subject to federal (but not state) income tax
Frequently Asked Questions
Related Terms
Browse more definitions in the financial terms glossary.