Zero-coupon bond
A zero-coupon bond, also known as a zero or accrual bond, is a type of debt security that does not make periodic interest payments to the bondholder.[1] Instead, it is issued and sold at a substantial discount to its face value, with the investor receiving the full par value at maturity; the difference between the purchase price and the maturity value constitutes the total return, effectively representing the compounded interest earned over the bond's life.[2][3] Zero-coupon bonds function by leveraging the time value of money, where the discounted purchase price reflects the present value of the future maturity payment, discounted at the bond's yield to maturity.[1] The price of a zero-coupon bond can be calculated using the formula:Price = Face Value / (1 + Yield)^Number of Periods,
where the yield is the annual interest rate and the number of periods is typically the years to maturity (adjusted for compounding frequency, often annual for simplicity).[1] For instance, a $1,000 face value bond maturing in 10 years at a 5% yield would be priced at approximately $613.91, with the investor realizing the full $1,000 at maturity.[1] These bonds are particularly sensitive to changes in interest rates due to their long durations and lack of interim cash flows, causing their market prices to fluctuate more than those of coupon-paying bonds.[2] Common examples include U.S. Treasury STRIPS (Separate Trading of Registered Interest and Principal of Securities), which are created by stripping the coupon and principal components from existing Treasury notes, bonds, or TIPS, resulting in pure zero-coupon instruments with no periodic payments.[4] Corporate and municipal issuers also offer zero-coupon bonds, often with maturities ranging from 10 to 30 years, making them suitable for long-term goals such as funding education or retirement.[1][2] Unlike traditional coupon bonds, zeros provide a predictable lump-sum payout at maturity without the need to reinvest interim interest, eliminating reinvestment risk.[1] Key advantages of zero-coupon bonds include their simplicity for buy-and-hold strategies and higher effective yields for long-term investors, as the entire return accrues through compounding.[1] However, they carry notable risks, such as taxation on imputed or "phantom" interest each year—even though no cash is received until maturity—which can create a tax liability without corresponding income for the investor.[2][3] Additionally, if interest rates rise, the bond's market value can decline sharply before maturity, amplifying price volatility.[2] Municipal zero-coupon bonds may offer tax exemptions to mitigate these issues, enhancing their appeal for taxable accounts.[2]