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Discounting ... The discount is usually associated with a discount rate, which is also called the discount yield. The discount yield is simply the proportional share of the initial amount owed (initial liability) that must be paid to delay payment for 1 year...

Coupon ... Therefore, the posted price paid by price-insensitive buyers can be increased, while using coupon discounts to maintain the price for price-sensitive buyers (who would not buy at a higher price)...