Renewed notes are bonds that mature every week and can be renewed. The coupon payment of such a bond is the sum of its annual interest payments. Coupons are paid out as a percentage of the bond's face value during a bond's validity, which runs from the date of issuance to the date of maturity. Divide the bond's face value by the total amount of coupons the investor has received over the course of a year to calculate the coupon rate. In other words, it is the effective rate of return for the investor calculated by the coupon rate.

A coupon is a discount or voucher provided by retailers, manufacturers, or service providers, allowing customers to purchase products or services at a reduced price or with special perks. Coupons can be physical, like paper vouchers, or digital, accessible through websites, emails, or mobile apps. They may offer a percentage discount, a set dollar amount off, or additional items at no extra cost, such as "buy one, get one free" deals. Retailers use coupons to attract customers, promote new products, clear inventory, or reward loyal shoppers. For consumers, coupons provide a way to save money or access exclusive deals, encouraging them to make purchases they might otherwise skip or try new products or brands at a lower risk.