Government securities are debt instruments issued by a government to support government spending and obligations. These securities include Treasury bills, bonds, notes, and savings bonds, all of which are considered highly creditworthy due to the backing of the government's 'full faith and credit.'
National debt refers to the total amount of money that the federal government owes to creditors due to borrowing. It consists of various debt instruments such as Treasury bills, Treasury notes, and Treasury bonds. The interest on the national debt is a significant part of the federal government's annual expenses.
Direct government obligations, comprising debt issues of the U.S. government, including Treasury bills, notes, bonds, and Series EE, Series HH, and Series I savings bonds, as distinct from government-sponsored agency issues.
