#美国国债 U.S. Treasury bonds are issued by the Treasury Department on behalf of the federal government, categorized into two types: circulating and non-circulating, with the former including five categories such as short-term treasury bills. Recently, the U.S. bond market has been highly volatile, closing higher on June 13, driven by unemployment and PPI data, as well as demand for 30-year Treasury bond auctions, with yields falling by 4.5 to 8 basis points. In May, Moody's downgraded the U.S. sovereign credit rating, leading to a sell-off in Treasury bonds, with the 30-year yield briefly surpassing 5%. Goldman Sachs raised its 10-year U.S. Treasury yield forecast to 4.5%, while JPMorgan warned that an expanded scale could lead to turmoil in the bond market.