What is Bond coupon?
Also known as: coupon, coupon rate
The interest that a bond's issuer pays the holder regularly until maturity. It is usually set as an annual percentage of the face value (the coupon rate) and may be paid once, twice or four times a year. The coupon is usually fixed when the bond is issued; even if the market price changes, the amount paid is calculated on the face value. That is why an investor who bought the bond below face value earns an actual yield above the coupon rate, while one who bought above face value earns less. Under the Tax Code, both the coupon and income in the form of a discount are treated as interest.
Source: Britannica Money: Bond market basics; Soliq kodeksi, 41-moddaning beshinchi qismi