Treasury bonds are long-term debt securities issued by the U.S. Department of the Treasury to help finance government spending. They typically have maturities ranging from 10 to 30 years and pay interest to investors every six months until maturity. At the end of the bond's term, the principal amount is returned to the bondholder. These bonds are considered low-risk investments because they are backed by the full faith and credit of the U.S. government. Investors often purchase Treasury bonds for their stability and predictable income, making them a popular choice for conservative investment portfolios.