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T Bonds & Fixed Income

Definition / Meaning of Treasury bonds

Treasury bonds (often called T-bonds) are long-term debt securities issued by the U.S. Department of the Treasury to finance government spending. They have maturities of 20 or 30 years and pay a fixed rate of interest every six months until they mature. At maturity, the bondholder receives the bond’s face value (also called par value). Because they are backed by the full faith and credit of the U.S. government, Treasury bonds are considered one of the safest investments in the world.

Key Features of Treasury Bonds

  • Maturity: 20 or 30 years from the date of issue.
  • Coupon payments: Fixed interest paid semiannually. The coupon rate is set at auction and remains constant for the life of the bond.
  • Face value: Typically $100 or multiples thereof. You receive this amount at maturity.
  • Secondary market: T-bonds can be bought and sold on the open market before they mature, so their price fluctuates based on interest rates and demand.
  • Tax treatment: Interest income is exempt from state and local taxes but is subject to federal income tax.

How Treasury Bonds Work

The U.S. Treasury sells T-bonds through regular auctions. Investors submit bids, and the bonds are issued at a price that may be at, above, or below face value. Once issued, the bond pays a fixed coupon rate. For example, a 30-year Treasury bond with a 4% coupon will pay $40 per year (in two $20 payments) for every $1,000 of face value. When interest rates rise, existing bonds with lower coupons become less attractive, so their market price falls. Conversely, when rates fall, bond prices rise. This inverse relationship is a key concept in fixed-income investing.

Treasury Bonds vs. Other Treasuries

The U.S. Treasury issues three main types of marketable securities: Treasury bills (short-term, maturing in one year or less), Treasury notes (medium-term, maturing in 2 to 10 years), and Treasury bonds (long-term, 20 or 30 years). The longer maturity of T-bonds means they generally offer higher yields to compensate for greater interest rate risk. They also have higher price volatility than shorter-term Treasuries.

Why Invest in Treasury Bonds?

  • Safety: The U.S. government has never defaulted on its debt, making T-bonds a cornerstone of conservative portfolios.
  • Income: They provide predictable, semiannual interest payments.
  • Diversification: T-bonds often move inversely to stocks, helping to reduce overall portfolio risk.
  • Liquidity: The market for Treasuries is deep and active, so you can buy or sell large amounts easily.

Risks of Treasury Bonds

While credit risk is minimal, T-bonds are subject to interest rate risk. If you sell a bond before maturity when rates have risen, you may receive less than you paid. Inflation risk is another concern: if inflation outpaces the bond’s yield, your purchasing power erodes over time. For this reason, some investors use Treasury Inflation-Protected Securities (TIPS) instead.

In summary, Treasury bonds are a foundational building block for long-term, income-focused investors who prioritize safety and predictable cash flows. They are often used to fund retirement, education, or other long-term goals.

Also Known As T-bonds, long-term Treasuries
Topics Bonds & Fixed Income
Letter T
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Last Updated May 2026

Related Terms

Y Yield curve M Municipal bond (muni) T Treasury notes C Coupon

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