Zero-Coupon Corporate Bond

A zero-coupon bond takes the coupon to its logical extreme: no interest payments at all. You buy the bond at a steep discount (say, $400 for a $1,000 par bond) and receive nothing until maturity, when you get the full $1,000. The difference between your purchase price and par is your return. Zero-coupon bonds have extreme duration—the longest bonds are the most volatile—and are favored by investors with known future liabilities.

How zeros work

A company issues a 20-year zero-coupon bond with $1,000 par. It offers the bond at $200—an 80% discount. As an investor, you pay $200 today. For 20 years, you receive no coupon payments. At maturity, you receive $1,000.

Your return is the difference between your purchase price and par, compounded over time. With a $200 investment growing to $1,000 over 20 years, your annualized return is approximately 8.4%—the yield to maturity. No coupons, just compounding.

The economics of zeros

Zeros are economically equivalent to receiving a single lump-sum payment at maturity. They’re useful in specific scenarios:

Liability matching. A pension fund knows it owes a $1 million benefit in exactly 15 years. Instead of buying a coupon-paying bond and managing reinvestment risk, it buys a 15-year zero-coupon bond with $1 million par value. No uncertainty, no reinvestment decisions.

Speculation on rates. A trader bullish on rates falling buys a 20-year zero. If rates drop 100 basis points, the zero’s price surges 30%+ because all the bond’s value is concentrated at maturity. A 20-year coupon-paying bond would appreciate 12–15%. The leveraged rate sensitivity of zeros makes them volatile bets.

Tax-deferred accounts. Inside a retirement account where realized capital gains aren’t taxed annually, zeros are attractive because all return is deferred to maturity.

Duration and interest-rate risk

Zeros have the longest duration of any bond for a given maturity. A 20-year zero-coupon bond has a duration of approximately 20 years. A 20-year coupon-paying bond has a duration of perhaps 15 years (the periodic coupons reduce duration by returning cash flow earlier).

This means zeros are extremely sensitive to interest rate changes. A 1% rise in rates might drop a 20-year zero by 20%, but a 20-year coupon bond by only 15%. Conversely, a 1% rate fall boosts the zero by 20%.

Tax complications (U.S. context)

In the U.S., zero-coupon bonds create a tax issue: you owe ordinary income tax on the “accrued interest” (the implied coupon) every year, even though you receive no cash. If you buy a corporate zero at $200 and the $1,000 par matures in 20 years, the IRS assumes you’re earning roughly 8.4% per year. You owe tax on that 8.4%, compounded annually, even though you receive $0 until maturity.

This makes zeros less attractive for taxable accounts (you’re paying tax on money you haven’t received). They’re most useful in tax-deferred accounts like 401(k)s, IRAs, or for corporations (which can defer tax considerations through other mechanisms).

Treasury zeros are often preferred in taxable accounts because they’re issued at deep discounts (same tax issue, but smaller absolute tax burden due to lower yields).

Pricing and spread

Zero-coupon corporate bonds trade on credit spread, just like coupon bonds, but the spread calculation is more complex. A zero has no intermediate cash flow, so all of the investor’s return depends on the company surviving to maturity and paying par. This makes zeros more sensitive to credit risk than coupon bonds—any deterioration in the company’s credit has maximum impact.

As a result, zeros often trade with wider spreads than the issuer’s coupon bonds. A company’s 5-year coupon bond might trade at 150 bps, while its 20-year zero might trade at 300+ bps, reflecting the extended maturity and lack of interim cash flow certainty.

Use cases in corporate finance

Companies rarely issue standalone zeros; they’re more common as structured debt components. For example, convertible bonds often behave like zeros until the conversion feature is triggered. Private equity and leveraged buyout structures sometimes use zeros to extend the debt maturity profile without high interim cash demands.