As foreign investors continued to sell off Korean won-denominated assets, government bond yields surged across the board on September 26, while the value of bonds declined alongside stocks and the exchange rate.
On the 19th, the KOSPI index opened at 3461.23, down 0.07 points from the previous trading day, as dealers worked in the dealing room at the Hana Bank headquarters in Jung-gu, Seoul. On the same day, the KOSDAQ index started trading at 858.08, up 0.97 points from the previous trading day. Photo by Kang Jinhyung, September 19, 2025.
Bond yields and prices move in opposite directions, so a rise in yields means a drop in prices.
On this day in the Seoul bond market, the yield on three-year government bonds closed at 2.562%, up 3.4 basis points (1bp = 0.01 percentage points) from the previous trading day.
The yield on ten-year bonds rose 5.8 basis points to 2.943% per annum, marking the highest level of the year.
The yield on five-year bonds climbed 4.3 basis points to 2.716% per annum, while the two-year yield increased 3.2 basis points to close at 2.499% per annum.
The yield on twenty-year bonds rose 3.6 basis points to 2.879% per annum. The yields on thirty-year and fifty-year bonds each increased by 4.3 basis points, reaching 2.812% and 2.678% per annum, respectively.
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