A zero-coupon bond is a bond that does not pay out any periodic interest payments, but instead is sold at a discount from its face value and matures at its face value.
A zero-coupon bond is structured so that the issuer pays the bondholder the face value when the bond matures. The bondholder pays an amount lower than the face value when purchasing the bond, the difference being the return earned on the bond.
There are risks associated with zero-coupon bonds, such as the risk of default, interest rate risk, inflation risk, and liquidity risk.
Yes. The Internal Revenue Service considers the difference between the purchase price of a zero-coupon bond and the face value of the bond to be taxable income. This income is taxed at the same rate as ordinary income.