Seoul: South Korean bond yields witnessed an upward trajectory on the morning of May 18, 2026, with various durations experiencing increases in basis points. The yields for 1-year Treasury bonds rose to 3.161% from the previous session's 3.138%, marking an increase of 2.3 basis points.

According to Yonhap News Agency, the 2-year Treasury bonds saw a rise to 3.645% from 3.605%, a shift of 4.0 basis points. Similarly, the 3-year Treasury bonds increased to 3.814% from 3.766%, reflecting a 4.8 basis point change. The most significant movement was observed in the 10-year Treasury bonds, which climbed to 4.296% from 4.217%, showing an increase of 7.9 basis points.

Additionally, the yields for the 2-year Monetary Stabilization Bonds grew to 3.665% from 3.630%, a 3.5 basis points rise. The 3-year Corporate Bonds with a rating of AA- experienced an increase to 4.437% from the previous 4.391%, an adjustment of 4.6 basis points.