Treasury Securities are government debt instruments issued by the U.S. Department of the Treasury to finance national spending. They come in various forms, including Treasury bills, Treasury notes, and Treasury bonds, each differing in maturity length and interest payment structures. These securities are considered low-risk investments because they are backed by the full faith and credit of the U.S. government. Investors purchase Treasury Securities to earn interest over time, with the principal amount returned at maturity. They are often used as a safe haven during economic uncertainty and play a crucial role in the global financial system, influencing interest rates and investment strategies.