Treasury bills

Debt obligations of the US Treasury that have maturities of one year or less. Maturities for T-bills are usually 91 days, 182 days, or 52 weeks. Treasury bills are sold at a discount from face value and do not pay interest before maturity. The interest is the difference between the purchase price of the bill and the amount that is paid to you either at maturity (this amount is the face value) or when you sell the bill prior to maturity.