Government Bond Yield

The market yield on government bonds issued by the government, serving as the benchmark for the risk-free rate and the benchmark for the pricing of all financial assets.

Government Bond Yield

Overview

Government bond yield (국채금리) refers to the yield that investors demand on government bonds issued by a government to raise fiscal funds—that is, the interest rate formed in the secondary market. If maturities are the same, government bond yields are regarded as an indicator close to the risk-free funding cost of the country, and serve as the benchmark for the pricing of almost all financial products, including corporate bonds, loans, and mortgages. Accordingly, the level and direction of government bond yields are a key macroeconomic thermometer that comprehensively reflects monetary policy, prices, fiscal soundness, and global capital flows.

Key Content

Definition and Calculation Principle

Unlike the coupon rate fixed at issuance, government bond yields fluctuate daily in the secondary market. The discount rate that equates the current price with future cash flows (coupons + principal repayment) is the yield to maturity (YTM), and when the media says “the 10-year government bond yield is 3%,” it usually means this YTM. Bond prices and yields move in opposite directions. When yields rise, bonds issued with lower coupons become less attractive and their prices fall; conversely, when yields fall, existing bond prices rise. This relationship is quantified by duration, and the longer the maturity, the greater the price sensitivity to yield changes.

Major Government Bonds and Global Benchmarks

U.S. Treasuries: The 2-year and 10-year are benchmarks for global financial markets, and the 10-year serves as the benchmark for mortgage and corporate bond yields.
German Bunds, UK Gilts: Representative benchmarks for European interest rates.
Japanese Government Bonds (JGBs): A symbol of the ultra-low interest rate environment and the basis of the yen carry trade.
Korean Treasury Bonds (KTBs): The 3-year and 10-year government bonds serve as domestic benchmark yields, and because foreign investor share is high, they react sensitively to exchange rates and sovereign credit ratings.

Yield Curve

The line connecting yields by maturity is called the yield curve. Normally it slopes upward with higher long-term yields, due to the risk premium (term premium) for holding longer maturities. An inversion, in which short-term yields are higher than long-term yields, is often cited as a leading indicator of past recessions. In the United States, the 2-year–10-year spread inversion appeared just before almost every recession since the 1970s.

Determinants of Interest Rates

1. Monetary policy: Central bank policy rate adjustments and quantitative easing/tightening.

2. Prices and inflation expectations: Nominal rate = real rate + expected inflation (Fisher equation).

3. Fiscal soundness: Government debt growth and government bond issuance volume.

4. Global supply and demand: Safe-haven preference, foreign capital inflows and outflows.

5. Term premium and liquidity: Number of market participants and ease of trading.

Impact on the Economy

A rise in government bond yields raises corporate funding costs and household loan interest rates, dampening consumption and investment. Conversely, a decline in yields pushes asset prices higher. In stock valuation, government bond yields act as a discount rate, so when yields rise, growth stocks with a large share of future cash flows come under relatively greater pressure. Emerging economies face capital outflows and currency depreciation pressure when U.S. interest rates rise, which can in turn create a vicious cycle leading to external debt burdens.

Latest Trends (2024–2025)

After rapid tightening in 2022–2023, the U.S. Federal Reserve entered a policy rate cut cycle from the second half of 2024, but due to sticky inflation and solid employment, the 10-year yield repeatedly fluctuated in the low-to-mid 4% range.
As the Bank of Japan (BOJ) lifted negative interest rates and proceeded with reductions in government bond purchases, JGB yields rose to their highest levels in decades, leading to concerns over unwinding of the yen carry trade and increased global volatility.
In Korea, the 3-year and 10-year government bonds are reacting sensitively amid expectations of a base rate cut and volatility in household debt and exchange rates, while expanded foreign investment in government bonds and the issue of inclusion in the World Government Bond Index (WGBI) have emerged as supply-demand variables.
With widening fiscal deficits and increased government bond supply in major countries, the “term premium” is drawing attention again. A growing number of analyses argue that the AI data center and power infrastructure investment boom is stimulating enormous capital demand, acting as upward pressure on long-term yields.
Discussions are also underway that digital infrastructure such as tokenized government bonds and CBDCs could change how government bonds are used for settlement and collateral, and government bonds continue to function as the ultimate collateral asset of the global financial system.