Apprendre / banking
A bond is a loan to an issuer
Coupon, maturity and market price have distinct roles.

Investopedia explains that bondholders lend to governments or businesses under stated repayment terms. A coupon describes contractual interest, while the market price responds to rates and credit conditions. Maturity identifies the scheduled principal repayment date. A repayment promise still depends on the issuer meeting its obligations.
Research sources & methodology
Original sources and publication references.
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