Definition / Meaning of Zero-coupon bond
A zero-coupon bond is a type of bond that does not pay periodic interest payments (coupons) to its holder. Instead, it is issued at a deep discount to its face value and pays the full face value at maturity. The investor’s return comes entirely from the difference between the purchase price and the face value, which is effectively the interest that accrues over the life of the bond.
How Zero-Coupon Bonds Work
Unlike a traditional bond that pays interest semiannually, a zero-coupon bond has no such payments. For example, a zero-coupon bond with a face value of $1,000 and a maturity of 10 years might be issued for $500. At the end of 10 years, the investor receives $1,000. The $500 difference represents the interest earned, which is compounded annually at the bond’s yield to maturity. This structure makes zero-coupon bonds particularly sensitive to changes in interest rates, a concept known as duration.
Key Features
- Deep Discount: Issued at a price significantly below face value.
- No Periodic Interest: No coupon payments are made during the bond’s life.
- Single Payment at Maturity: The investor receives the full face value at the end of the term.
- Accrued Interest: The difference between the purchase price and face value is considered interest that accrues over time, even though it is not paid out until maturity.
Tax Considerations
Even though zero-coupon bonds do not pay interest until maturity, the IRS treats the annual accrual of interest as taxable income each year. This is known as “imputed interest” or “phantom income.” Investors must pay taxes on this imputed interest annually, even though they do not receive any cash payments. For this reason, zero-coupon bonds are often held in tax-advantaged accounts like IRAs or 401(k)s to avoid the annual tax burden.
Types of Zero-Coupon Bonds
- Treasury STRIPS: These are zero-coupon bonds created from U.S. Treasury notes and bonds. They are considered very safe because they are backed by the U.S. government.
- Corporate Zero-Coupon Bonds: Issued by corporations, these carry higher risk and typically offer higher yields than Treasury STRIPS.
- Municipal Zero-Coupon Bonds: Issued by state and local governments, these may offer tax-free interest at the federal and sometimes state level.
Advantages and Disadvantages
| Advantages | Disadvantages |
|---|---|
| Predictable return if held to maturity. | High interest rate risk (long duration). |
| No reinvestment risk because there are no coupon payments to reinvest. | Taxable phantom income each year. |
| Can be purchased at a low initial cost. | May be less liquid than coupon-paying bonds. |
Who Should Invest?
Zero-coupon bonds are suitable for investors who have a specific future financial goal, such as funding a child’s college education or saving for retirement. Because the return is locked in at purchase, they provide certainty about the amount that will be received at maturity. They are also popular for long-term planning because the compounding effect can be significant over many years.