South Korea Government Bond Yield Curve

FAQ

• What are the main drivers of the shape and movement of the South Korea yield curve?

  
  Domestic drivers of the South Korea yield curve include Bank of Korea decisions, inflation, movements in KRW, the economic growth outlook, export performance, fiscal indicators, and public debt dynamics. External influences include US interest rates, the global technology cycle, economic conditions in China, international capital flows, geopolitical risks, and demand for South Korean government bonds.

• What information about the probable future trajectory of interest rates can the yield curve slope configuration provide?

  
  The market interprets the probable trajectory of interest rates and borrowing costs through four primary yield curve slope configurations:
  

  • A normal slope indicates expectations of gradual rate increases or stability, as current monetary policy is deemed adequate and long-term rates naturally exceed short-term rates; further hikes are only expected if economic growth accelerates above potential.
  • Inversion signals the inevitability of a rate-cutting cycle: market participants assume that current high rates are restrictive, which will lead to economic cooling and force the regulator to ease policy in the near term.
  • A flat slope reflects either expectations of prolonged high rates or uncertainty regarding the regulator's next moves. As the market sees no basis for either sharp rate increases or rapid cuts, the spread between short-term and long-term forecasts becomes minimal.
  • A humped shape predicts volatile dynamics: rates are expected to rise or remain at peak levels in the medium term, followed by a significant decline at the long end as economic conditions normalize.

• Which yield curve tenor combinations are most informative for analyzing macroeconomic expectations?

  
  The choice of tenor combination depends on the forecasting objective: if the goal is inflation, the forecast horizon must match the maturity difference (a classic example is the 5Y–1Y spread for a five-year horizon). If the goal is to assess future economic activity, it is more effective to use the widest available spread on the given curve, i.e., to evaluate the difference between the maximum and minimum tenors. The standard combination in this case is the 10Y–2Y spread. High correlation among various wide spreads allows any of them to be used without loss of forecast quality.

• What are the specific considerations when analysing the short and long ends of the yield curve?

  
  The curve spans maturities from 1 year to 50 years and comprises 8 points in total.
  

  • The 1–7-year segment serves as an indicator of expectations regarding future GDP growth and inflation.
  • The 7–50-year segment is shaped by inflation expectations and the risk premium. Yields beyond 10 years reflect investors’ outlook for South Korea’s macroeconomic stability.

• How is sovereign credit risk reflected in the government bond yield curve?

  
  Sovereign credit risk is reflected in the yield curve through the premium investors require for uncertainty regarding the government’s ability to meet its debt obligations. An increase in perceived risk may lead to higher yields and an upward shift in the curve. Where concerns are concentrated over a particular time horizon, the corresponding segments of the curve may move more significantly. The premium can be approximated using the spread between government bond yields and the yields on maturity-matched securities issued by a more creditworthy sovereign.

• Who issues South Korean government bonds and organises the country’s debt borrowing?

  
  The issuance of Korean Treasury Bonds is organised by the Ministry of Economy and Finance (MOEF). Its government bond policy division determines the government bond issuance programme. The yields on these securities across different maturities form the principal benchmarks for the South Korean government bond yield curve. Regular issuance supports market pricing across the medium-, long-, and ultra-long-term segments of the curve.

• Can the yield curve serve as a reference point for assessing corporate bonds?

  
  The yield curve can be used as a reference when assessing the fair yield of a corporate bond. The corresponding point on the curve indicates the base yield on government debt instruments at a comparable maturity, while the corporate bond yield includes a premium for additional risks. This premium may reflect the issuer’s financial position, the likelihood of meeting its obligations, the liquidity of the issue, and other relevant features. The difference between the two yields represents the additional compensation investors require relative to government securities.

• Why is government bond liquidity important for constructing a representative yield curve?

  
  A liquid market provides more current price data for constructing the yield curve. A sufficient number of active issues helps cover a wider range of maturities, while regular transactions keep individual points up to date. The greater the number of reliable market observations, the more accurately the curve reflects prevailing yield levels. When liquidity is insufficient, data are updated less consistently, causing some segments of the curve to become less stable, less smooth, and less representative.

• How can the movement of the yield curve be viewed over time?

  
  By default, the page displays the latest yield curve values alongside values from approximately one month earlier, allowing its current position to be compared with the previous period. Additional observation dates can be selected using the “Add date” field. Yield curve values for up to 10 dates can be displayed simultaneously. The “Show dynamics” feature allows users to track changes in the yield curve over a selected period.

• When are new Republic of Korea yield curve values published?

  
  The curve values are published daily following the close of the trading session. For example, data for the session on May 6, 2026, is published after its completion.