Long-term debt maturing in 20 or 30 years. They pay a fixed interest rate every 6 months.
Before initiating a purchase, distinguish between the financial vehicles offered by the U.S. government: how to buy us treasury bonds
Mid-term debt maturing in 2 to 10 years. They pay a fixed interest rate every 6 months. Long-term debt maturing in 20 or 30 years