How do fixed and floating coupons change a bond’s payment schedule?

Define the payment rules

Investor.gov distinguishes fixed corporate-bond coupons from floating rates that reset periodically using a benchmark. The specific formula and timing belong to the bond’s terms. A floating coupon should not be reconstructed from an unstated assumption that it follows today’s rate instantly.

For this original exercise, use two fictional $1,000 face-value bonds with three one-year coupon periods. Bond F pays a fixed 5% annual coupon. Bond V sets each full year’s coupon at that year’s opening benchmark plus a contractual 1-percentage-point margin. Payments occur at year-end; assume no default or principal change.

Fill the reset ledger

Stipulate opening benchmark fixings of 4%, 2%, and 5% for Years 1, 2, and 3. Bond V’s corresponding coupon rates are 5%, 3%, and 6%. Applied to $1,000 face value for each full year, the payments are $50, $30, and $60, totaling $140.

Bond F pays $50 in each year, totaling $150. The floating schedule produces $10 less coupon cash under this invented sequence. That is not a conclusion about which structure is better; a different benchmark sequence would give a different comparison.

Test a separately specified cap

Now define a separate version of V with a 5% cap on the total coupon rate. Its period rates become 5%, 3%, and 5%, yielding $50 + $30 + $50 = $130. The cap changes the Year 3 payment in this worksheet.

This is a different contractual structure, not a feature assumed for every floating-rate bond. Record whether a cap applies to the whole coupon or a component, and whether a floor or another adjustment exists. Missing terms should remain unknown rather than being filled with convenient defaults.

Separate a contractual margin from a market spread

The stipulated 1-point margin in V’s coupon formula is a contract input. It is not a fresh measurement of the yield difference between the bond and a government benchmark. A quoted market yield and a coupon reset answer different questions.

The worksheet also keeps annual periods deliberately simple. A real payment can depend on a fixing date, lag, accrual fraction, and payment calendar. Before comparing a quote with a payment, identify those conventions. The nominal coupon totals above assume coupons earn nothing after receipt and do not include a change in the bond’s market price.

Method, sources, and limits

All bonds, fixings, margins, and caps are invented, with coupon calculations checked using decimal arithmetic. Investor.gov’s source was opened on 26 October 2026. No actual benchmark or product was selected. The exercise neither prices the bonds nor estimates credit, liquidity, or reinvestment risk. A floating coupon is not a guarantee against loss, and the $140 and $150 totals are cash-flow sums rather than annualized investment returns.