Treasury Strip

A Treasury strip (stripped Treasury security) is a zero-coupon bond created by separating the coupon payments and principal repayment of a regular Treasury note or bond, allowing each to be sold and traded independently as a distinct security.

How Treasury stripping works

A standard Treasury note has a maturity date and periodic coupon payments. For example, a 10-year Treasury yielding 4% pays $40 annually in coupons plus returns $1,000 principal at maturity. A primary dealer can “strip” this security into separate pieces: each semi-annual coupon becomes a standalone zero-coupon bond, and the principal repayment becomes another zero-coupon bond. The dealer bundles these pieces with strips from many other Treasuries to create a family of zero-coupon instruments, each maturing on a specific date and paying one lump sum at maturity.

The appeal of zero-coupon bonds

Traditional bonds pay coupons; you receive cash along the way. Zero-coupon bonds pay nothing until maturity, when you receive the full face value. This appeals to investors with a specific known liability or goal. A parent saving for a child’s college tuition in 15 years buys a 15-year Treasury strip; the cost is a fraction of $1,000, and in 15 years the parent receives exactly $1,000—no reinvestment risk. Unlike a regular bond where coupon payments must be reinvested (and interest rates may have fallen), a strip eliminates reinvestment uncertainty. The purchase price locks in the total return.

Pricing and discount mechanics

Treasury strips trade at a steep discount. A Treasury strip maturing in 10 years and paying $1,000 might cost $600 today. The discount reflects the time value of money; you are giving up $600 today to receive $1,000 in a decade. The implied yield is the discount rate that makes the present value equal to today’s price. If the market yield rises, strip prices fall (increasing the discount). If yields fall, prices rise. Because strips have no coupons, they are extremely sensitive to yield changes—much more sensitive than regular bonds with the same maturity. This makes them attractive to traders but risky for conservative investors.

Tax complications: phantom income

The Internal Revenue Service treats a Treasury strip as an accrual-method security. Even though you receive no cash until maturity, the IRS assumes you earned interest each year based on the strip’s implied yield. This “phantom income” is taxable annually on Form 1040, creating an awkward situation: the investor owes tax on income never received. A 10-year strip purchased at $600 and maturing for $1,000 might accrue $50 in phantom income in year one. The investor must pay income tax on that $50 despite holding the security. This is why Treasury strips are ideally held in tax-deferred accounts (IRAs, 401(k)s, etc.) or by tax-exempt entities.

Yield curve implications

Treasury strips are crucial for understanding the yield curve. The curve plots the yield of Treasury securities across maturities. However, most Treasuries traded in the secondary market are coupon-bearing. Their observed yields are complex to interpret because they reflect both the path of short-term rates and the embedded coupons. Treasury strips, being zero-coupon instruments, provide a pure read on the market’s expectation of discount rates at each maturity. Economists and traders use strip data to back out forward interest rates and forecast future short-rate expectations.

Primary dealer monopoly and creation

Treasury strips are created by primary dealers—large banks and securities firms approved by the Federal Reserve to conduct open-market operations and bid in Treasury auctions. Only primary dealers can “un-strip” a Treasury (reverse the process) or assemble new stripped securities. This creates a monopoly on strip creation and potentially high bid-ask spreads for retail investors. Individual investors typically buy strips through a broker, which passes the order to a dealer, often at a mark-up.

Reconstitution and substitutability

Treasury strips can be “reconstituted”—the individual pieces reassembled back into a regular coupon-bearing Treasury note. This arbitrage opportunity keeps strip pricing aligned with coupon-bond pricing. If a Treasury note’s components (coupons and principal) trade at prices implying a yield of 3.8%, while the whole note yields 4%, dealers buy the whole note, strip it, and sell the pieces, locking in a profit. This arbitrage activity ties the prices together, keeping the market efficient.