A type of long-term debt (debt instrument) that is issued by the treasury department. Long-term treasury securities belong to the family of treasuries (treasury securities), that are considered, from holders/ investors’ perspective, one of the safest investments (if issued by a credit-worthy government) given that principal repayment and interest payment are backed by the full faith and credit of the government.

Long-term treasuries include the 30-year treasury bond (T-bond) and the 10-year treasury note (T-note), and generally bear the highest interest rate payments of any treasury security because of the additional amount of risk embedded in any long-term holding. Any spike in inflation could reduce the value of the interest payments and the repayment of face value at maturity.