The yield on the 30-year U.S. Treasury bond auction has risen to its highest level in 26 years.

Data released by the U.S. Department of the Treasury on the 13th showed that the winning yield for the $25 billion 30-year Treasury bond auction that day was 5.216%, the highest level since 2001, putting pressure on the U.S. government to issue long-term bonds at increased funding costs. The bond is scheduled for issuance on August 17 and will mature on August 15, 2056. Although the total bid amount reached $59.8 billion, investors demanded higher returns.