The article gives an overview of fixed income securities, focusing on zero-coupon and coupon bonds. Zero-coupon bonds make one payment at maturity, while coupon bonds make regular interest payments until maturity. Coupon bonds can be seen as a series of zero-coupon bonds. Zero-coupon bonds are the simplest form of fixed income security, where the issuer promises to pay the bond's face value at maturity. Most bonds in the market make periodic interest payments and are known as coupon bonds. The coupons are a percentage of the bond's value, with the final payment being the bond's full value at maturity.