The 30-year treasury bond is a fixed income bond issued by the U.S. government with a term of 30 years and is issued in February, May, August and November every year. The issuer of this bond is the US Treasury Department, with the aim of raising funds to meet the government's expenditure needs.

The face value of the US 30-year treasury bond is $100, and the interest is paid once a year. The interest rate of this bond is fixed, which means that a certain amount of interest is paid annually until the maturity date. The bond maturity date is 30 years after the issuance date, and investors can recover the face value at maturity. The yield of this bond is usually higher than other short-term bonds because of its longer maturity and higher risk.

The US 30-year treasury bond bond is a safe investment choice because the US government has the ability to pay its debts. The yield of this bond is also influenced by the US economy and inflation rate. If the US economy performs well and the market expects inflation to rise, then the yield of the bond may rise, and vice versa.

Investors can buy 30-year treasury bond bonds through stock exchanges or brokers, or directly through TreasuryDirect system. In addition, the bond can also be used as an investment choice for pension plans to ensure long-term returns and asset stability.

In a word, the 30-year treasury bond of the United States are a long-term and safe investment choice, suitable for investors who want to obtain stable returns and maintain their value.