It is also been explained above in the zero coupon bonds but this kind of bond is used to sell in discount from par value. In this the bond which is selling at a discount from par value has less rates of fixed income and securities then other bonds and it also has risk profile as well. This also contains the market price of 20% or more but it is below its face value. They are a bit riskier than other similar bonds. They are also termed as low-coupon bonds and are used in long term.