Seoul: South Korean bond yields experienced significant increases across multiple terms on May 15, 2026. The yield on the 1-year Treasury bond rose to 3.138%, marking an increase of 5.8 basis points from the previous session. Similarly, the 2-year Treasury bond saw its yield increase to 3.605%, up by 9.5 basis points. The 3-year Treasury bond yield climbed to 3.766%, reflecting an 11.2 basis point rise.

According to Yonhap News Agency, the 10-year Treasury bond saw the largest increase among the terms tracked, with its yield rising by 13.2 basis points to reach 4.217%. In the corporate bond market, the 3-year corporate bond (rated AA-) yield increased by 10.7 basis points, moving to 4.391%. The 2-year Monetary Stabilization Bond yield also increased to 3.630%, up by 9.0 basis points from the previous session.

The 91-day Certificate of Deposit yield remained unchanged at 2.810%, showing no movement from the previous session. These changes in bond yields are indicative of market trends and investor sentiment in the South Korean financial markets.