In the financial world, the term “Thirty (30) YR” usually refers to the 30-year Treasury bond, which is a debt security issued by the U.S. Department of the Treasury with a maturity of 30 years from the date of issuance. It is one of the most closely watched debt securities in the financial markets and is considered a benchmark for long-term interest rates. The 30-year Treasury bond is used by investors to manage risk, hedge against inflation, and generate income.