Why a bond’s coupon is not its total return

Separate the components

A coupon describes a contractual payment under a bond’s terms. The price paid for the bond may be above or below its face value, and that price can change before maturity. Costs, currency movements and the treatment of reinvested income can also affect the outcome.

Comparing bonds solely by coupon can therefore be misleading. A higher coupon may accompany a higher purchase price, greater credit risk or other conditions that change the economic comparison.

Understand interest-rate sensitivity

When market yields change, the price at which an existing bond can be sold will generally change as well. The degree of sensitivity depends on its cash flows and terms. Longer-dated instruments can be particularly sensitive, although maturity alone does not describe every feature.

An investor who may need to sell before maturity should consider this price risk explicitly. An intention to hold does not by itself ensure that circumstances will allow the intention to be maintained.

Read the credit and access risks

An issuer can fail to make a payment or repay principal. Seniority, security, covenants and restructuring provisions can affect the position of a holder. Credit ratings can provide context but are neither promises nor substitutes for understanding the instrument.

Liquidity matters too. A quoted price may not be available for the amount an investor wants to sell, especially under stressed conditions. Some instruments have features allowing payments to be deferred or the bond to be redeemed early.

Relate the instrument to its role

Fixed income can be considered for several purposes, including contractual cash flows, diversification or matching future obligations. The suitability of an instrument depends on how its risks align with that purpose.

Before making comparisons, use consistent assumptions about purchase price, currency, maturity, costs and credit quality. No yield or investment outcome is guaranteed by the presence of a coupon, and capital can be lost.