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A step-up bond is a bond whose coupon rate increases at predetermined intervals during its life. You receive a lower interest rate in the early years and progressively higher rates in the later years. The rate schedule is fixed at issuance and disclosed in the offering documents. Step-up bonds are most commonly issued by government-sponsored enterprises and corporations, and most carry a call feature that allows the issuer to redeem the bond early, typically before the scheduled rate increases take effect.
Think of a step-up bond like an employee pay scale with scheduled raises: you know in advance exactly when the increases will happen and by how much.
A step-up bond specifies a series of coupon rates tied to specific future dates. A simple example might offer 3% for the first two years, 4% for years three and four, and 5% from year five until maturity. Each scheduled rate increase is a "step." Bonds with one scheduled rate change are called single step-up bonds. Bonds with multiple increases over the life of the security are called multi-step-up bonds.
The key structural feature almost always accompanying a step-up bond is a call option. The issuer can call the bond, meaning repay the principal early, at par or at a slight premium on specified call dates. These call dates are typically scheduled just before the coupon steps up. This gives the issuer an incentive to call the bond when interest rates fall, since paying off the bond and refinancing at prevailing lower rates is more attractive than paying the higher scheduled step-up coupon.
Government-sponsored enterprises such as Fannie Mae and Freddie Mac are among the most active issuers of step-up bonds. Corporations also issue them. The structure benefits the issuer in rising-rate environments because the initial low coupon reduces financing costs. The step-up feature compensates investors for accepting that lower starting rate by promising future increases, making the instrument marketable without paying a market-rate coupon immediately.
Investors who buy step-up bonds are betting on two things: that the issuer will not call the bond early, and that the stepped-up coupon rates will exceed what they could earn by rolling short-term securities at prevailing rates. If interest rates fall sharply, the issuer is likely to call the bond before the high coupons arrive. The investor receives their principal back but faces reinvestment risk in a lower-rate environment.
Step-up bonds offer some protection in rising-rate environments because future coupon increases partially offset the loss in market value that higher rates impose on fixed-rate bonds. However, the call feature largely neutralizes this benefit: if rates rise significantly, the bond is unlikely to be called, so investors collect the escalating coupons, but the early years still carry below-market coupon payments.
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