Daily Economics, Business, and Finance Study

October 17, 2026 (KST) · Day 27
Today's Topic: Why Are Market Rates Different When There Is Only One Policy Rate? — Reading the Yield Curve, Term Spreads, and the Term Premium

1. Review of the Previous Lesson

Day 26 explained how an inflation shock passes through inflation expectations, real interest rates, the expected central-bank policy path, corporate cash flow, and discount rates. Today, we use the yield curve and the term premium to explain why two-year, ten-year, and thirty-year rates can move differently even though the central bank sets one policy rate.

2. Today's Core Concept

The yield curve is a map of interest rates that arranges bonds of the same type by maturity. Its shape contains both the market's expected path of future policy rates and the term premium, the compensation investors require for the risk of holding a long-term bond.

Today's learning objectives are as follows.

1. Understand why the policy rate and short- and long-term market rates differ.
2. Calculate normal, flat, and inverted yield curves and term spreads.
3. Decompose a long-term rate into expected short-term rates and a term premium.
4. Interpret steepening and flattening together with bullish or bearish bond-market direction.
5. Connect the yield curve to the economic outlook, corporate refinancing costs, and equity valuation.

The core relationship is:

\[ Long-term\ rate \approx Average\ expected\ future\ short-term\ rate +Term\ premium \]

3. Concept Explanation

3-1. There Is One Policy Rate but Many Market Rates

A central bank usually controls a very short-term policy rate directly. The real economy, however, contains rates with different maturities and credit risks.

Therefore, ten- and thirty-year yields can rise even while the policy rate is unchanged if long-term inflation uncertainty or concerns about government-bond supply increase. Conversely, the two-year yield can decline ahead of the policy rate if the market expects an economic slowdown and future rate cuts.

3-2. The Yield Curve Shows the Relationship Between Maturity and Yield

The horizontal axis of a yield curve is maturity and the vertical axis is yield. A comparison must use the same country, currency, credit risk, and yield definition.

Normal Curve

This is an upward-sloping curve in which long-term yields exceed short-term yields. It may reflect compensation for long holding-period risk and expectations for future growth and inflation.

Flat Curve

The difference between short- and long-term yields is small. It can appear near a policy turning point or when uncertainty about the economic outlook is high.

Inverted Yield Curve

This is a downward-sloping curve in which short-term yields exceed long-term yields. It may reflect the view that current policy is restrictive but an economic slowdown will eventually make rate cuts necessary.

A widely used term spread is:

\[ Ten-year-minus-two-year\ spread =Ten-year\ government-bond\ yield-Two-year\ government-bond\ yield \]

• Positive: The ten-year yield is generally higher.
• Near zero: The curve is flat.
• Negative: The curve is inverted, with the two-year yield higher.

The timing and meaning of the signal can differ depending on whether one uses the ten-year-minus-two-year spread, the ten-year-minus-three-month spread, or another pair of maturities.

3-3. A Long-Term Yield Equals Expected Short Rates Plus a Term Premium

Buying a ten-year bond may appear equivalent to buying a short-term bond repeatedly for ten years, but the risks are different. A long-term bondholder bears the risk that inflation, growth, policy, and government-bond supply will evolve differently from expectations during the holding period.

\[ Ten-year\ yield \approx Average\ expected\ short-term\ rate\ over\ the\ next\ ten\ years +Ten-year\ term\ premium \]

The term premium is the additional compensation investors require for bearing the risk of holding a long-term bond. It can rise when the following factors increase:

• Long-term inflation and policy uncertainty
• Interest-rate volatility
• Government-bond supply and weaker demand
• Central-bank balance-sheet runoff
• Changes in the investor base available to absorb long-term bonds
• Concerns about fiscal sustainability

The term premium is not directly observable on a market screen; it is estimated with a model. Estimates such as the New York Fed's ACM series are useful, but they are not official policy projections, and different models can produce different values.

3-4. Two-Year and Ten-Year Yields Are Sensitive to Different Information

The two-year government-bond yield is sensitive to the central bank's next several decisions and to the near-term inflation and employment outlook. It can therefore rise quickly after an upside inflation surprise or hawkish central-bank communication.

The ten-year government-bond yield reflects a broader set of factors:

• Long-term growth and productivity
• Long-term inflation expectations
• The long-run neutral rate
• Changes in the term premium
• Fiscal deficits and government-bond supply
• Global demand for safe assets

A higher ten-year yield must not automatically be interpreted as an expectation of a policy-rate increase. If the two-year yield barely moves while the ten-year yield rises, first investigate whether the term premium, long-term growth and inflation expectations, or fiscal factors have changed.

3-5. Interpret Steepening and Flattening Together With Direction

Steepening means the gap between long- and short-term yields is widening, while flattening means the gap is narrowing. The spread alone, however, does not reveal whether the overall bond market is rallying or selling off.

Because bond prices and yields move in opposite directions, distinguish the following cases.

Here, bull means rising bond prices and falling yields, while bear means falling bond prices and rising yields. These terms must not be confused with bullish or bearish equity markets.

3-6. An Inversion Is Not a Guaranteed Recession Signal

Yield-curve inversions have often appeared before past recessions, so they are used as a leading indicator. An inversion itself, however, does not automatically cause a recession or identify its exact starting date.

A typical path to inversion is:

1. The current policy rate rises to restrain inflation.
2. The market expects high rates to slow demand and employment.
3. It expects the central bank to cut rates later.
4. Short-term yields stay high while long-term yields remain relatively low, inverting the curve.

Long-term bond supply and demand, central-bank asset purchases, overseas safe-asset demand, and changes in the term premium also affect the curve. An investor should not sell all equities or predict a recession date solely because the curve is inverted.

More important is the reason for a subsequent re-steepening. Bull steepening caused by a sharp fall in short-term yields amid recession concerns can be negative for corporate earnings even though interest rates are falling.

3-7. A Forward Rate Is Not a Pure Policy-Rate Forecast Either

A forward rate is the rate for a specific future period implied by today's yield curve. For example, current one- and two-year yields can be used to calculate the rate priced for a one-year period beginning one year from now.

Under a simple annual-compounding assumption:

\[ (1+y_2)^2 =(1+y_1)(1+f_{1,1}) \]

• \(y_1\): Current one-year yield
• \(y_2\): Current two-year yield
• \(f_{1,1}\): One-year forward rate beginning one year from now

A forward rate can also contain a term premium and supply-demand effects. It must not be treated as a precise forecast of the central bank's policy rate.

3-8. The Yield Curve Reaches Corporate Funding and Equity Value

Changes in the yield curve affect enterprise value through the following channels.

Borrowing-Cost Channel

• Higher short-term rates → Higher floating-rate loan and working-capital costs
• Higher long-term rates → Higher corporate-bond issuance and long-term project funding costs
• Wider credit spreads → Higher corporate borrowing rates even if government-bond yields are unchanged
• Inversion and recession concerns → Potential tightening of bank lending standards and credit supply

Cash-Flow and Valuation Channel

• Higher long-term real yields → Higher WACC and discount rates
• Recession-driven bull steepening → Discount rates may fall while revenue and margin forecasts deteriorate
• Growth-driven bear steepening → Discount rates rise, but earnings forecasts for cyclical companies may improve
• Higher refinancing rates → Higher interest expense and lower FCF

The yield curve should therefore be used as a tool for judging both the cause of a rate change and the direction of cash flow, not as a simple rule that higher yields always mean lower stock prices.

4. A Simple Numerical Example

The following figures are hypothetical educational examples. They are not market forecasts or investment recommendations. All rates are annualized, and corporate amounts are in KRW 100 million.

① Calculate the Inversion and Bull Steepening

Before the change:

\[ 4.2\%-4.8\% =-0.6\%p \]

After the change:

\[ 3.9\%-3.8\% =+0.1\%p \]

Both yields fell, but the two-year yield declined by 1.0 percentage point while the ten-year yield declined by 0.3 percentage point. The short-term yield fell more, so this is bull steepening that removed the inversion.

If the change resulted from an expected economic slowdown and policy-rate cuts, it may be positive for bond prices but negative for corporate revenue and earnings forecasts.

② Decompose a Higher Ten-Year Yield Into the Term Premium

Assume the ten-year yield consists of the following components.

\[ Ten-year\ yield\ before\ the\ change =3.2\%+1.1\% =4.3\% \]

\[ Ten-year\ yield\ after\ the\ change =3.2\%+1.5\% =4.7\% \]

The ten-year yield rose by 0.4 percentage point, but the expected short-rate path did not change. In this example, the cause is a higher term premium, the compensation for bearing long-term bond risk. It would be incorrect to say that the market expects a 0.4-percentage-point policy-rate increase.

③ Calculate the Effect of a Higher Refinancing Rate on Interest Expense

Assume hypothetical Company A refinances KRW 100 billion of maturing bonds at 5.0%, up from 3.5%.

\[ Previous\ annual\ interest =1{,}000\times3.5\% =KRW\ 3.5\ billion \]

\[ Annual\ interest\ after\ refinancing =1{,}000\times5.0\% =KRW\ 5.0\ billion \]

\[ Increase\ in\ annual\ interest\ expense =50-35 =KRW\ 1.5\ billion \]

All else equal, pretax profit and cash flow decline by KRW 1.5 billion per year. The actual effect also depends on the refinancing date, issuance costs, fixed- versus floating-rate structure, hedging, taxes, and the average debt balance.

5. How to Use It in Stock and Company Analysis

① Record the Same Four Items Each Day

When analyzing the yield curve, record the following data at the same time and from the same source.

1. The policy rate or overnight rate
2. Two-year government-bond yield
3. Ten-year government-bond yield
4. ten-year-minus-two-year spread

When possible, add the ten-year real yield, expected inflation, a term-premium estimate, and corporate credit spreads.

② Name the Type of Change Before Focusing on the Spread

Do not treat the removal of an inversion itself as good news. Determine whether a sharp fall in short-term yields or a rise in long-term yields led the move.

③ Connect the Curve to the Company's Debt-Maturity Schedule

Review the following in order.

1. Borrowings and bonds maturing within the next one, two, and three years
2. The mix of fixed- and floating-rate debt
3. The gap between the existing average rate and the current new-borrowing rate
4. The maturity of interest-rate swaps and other hedges
5. Whether EBITDA, OCF, and FCF can cover interest and principal
6. Potential covenant breaches and undrawn credit facilities

Even if long-term government-bond yields fall, a sharp increase in credit spreads can prevent the company's actual refinancing rate from declining. Do not conclude that funding conditions have improved from government-bond yields alone.

④ Interpret the Yield Curve Differently by Industry

• Banks: An upward-sloping curve can support lending margins, but higher credit losses may matter more during recession-driven steepening.
• Insurers: Higher long-term rates can improve reinvestment yields, but asset and liability duration and valuation gains or losses must also be considered.
• Growth stocks: They can be sensitive to higher long-term real yields and WACC, but stronger earnings growth can offset the discount-rate shock.
• REITs and real estate: Long-term refinancing rates, asset values, rents, and vacancy rates can change simultaneously.
• Cyclical companies: Growth-driven bear steepening can support earnings forecasts, while recession-driven bull steepening can weaken them.
• Highly leveraged companies: The actual maturity schedule and credit spread can matter more than the shape of the government-bond curve.

⑤ Match the Valuation Risk-Free Rate to the Horizon

Using a short-term policy rate unchanged as the risk-free rate when discounting long-term cash flows can create a maturity mismatch. Use a government-bond yield or internally consistent risk-free-rate assumption appropriate for the valuation currency and the nature of the long-term cash flows.

It is also useful to show sensitivity to:

• The long-term risk-free rate ±0.5 percentage point
• The equity risk premium ±0.5 percentage point
• The credit spread and after-tax cost of debt
• Combinations of perpetual growth and WACC

⑥ Allow for the Yield Curve to Fail as an Economic Forecast

The curve contains not only policy expectations but also the term premium, government-bond supply, the size of the central-bank balance sheet, and overseas demand. Cross-check it with:

• Initial jobless claims, employment, and wages
• PMI and new orders
• Credit spreads and bank lending standards
• Corporate earnings estimates
• Consumption, housing, and capital expenditure
• Actual delinquency and default rates

6. What to Find in Disclosures

Central-Bank and Bond-Market Data: Check Outside Corporate Filings

U.S. Treasury maturity rates are constant-maturity par yields interpolated from benchmark prices for recently issued Treasury securities. They may not be identical to the actual transaction yield of any single bond, so check the definition and methodology.

Also distinguish the following terms.

• Coupon rate: The interest rate promised when the bond was issued
• Yield to maturity: The return under the assumption that the bond is bought at its current price and held to maturity
• Par yield: The hypothetical coupon rate that makes the bond's price equal to par
• Spot rate: The zero-coupon rate applied to a single cash flow at a specific maturity
• Forward rate: The rate for a future period implied by today's curve

Combining rates with different definitions in the same table can produce an incorrect conclusion.

Korean Companies: DART

Financial Supervisory Service DART annual, semiannual, and quarterly reports contain the following items.

Distinguish consolidated from separate reporting, closing balances from period averages, and nominal amounts from carrying amounts. A disclosed rate sensitivity may be a simple analysis that holds all other variables constant, so read the assumptions as well.

U.S. Companies: 10-K and 10-Q

SEC EDGAR contains the following items.

• 10-K Item 7 / 10-Q Part I, Item 2 — MD&A: Effect of rates and refinancing conditions on results and liquidity
• 10-K Item 7A / 10-Q Part I, Item 3 — Quantitative and Qualitative Disclosures About Market Risk: Interest-rate sensitivity
• Debt note: fixed/floating mix, weighted-average rate, maturity schedule, covenants
• Liquidity and Capital Resources: Cash, credit facilities, maturities, and refinancing plans
• Derivatives and Hedging: Interest-rate swaps and cash-flow hedges
• Fair Value Measurements: Discount rates, yield curves, and other valuation inputs
• Pension and Postretirement Benefits: Discount rates and liability sensitivity
• Subsequent Events: New borrowing, repayment, and bond issuance after the reporting date

Corporate filings generally do not contain the market's entire daily yield curve or a term-premium estimate. Combine official market data from the same valuation date with the company's disclosed debt-maturity schedule.

7. Key Takeaways

• The yield curve is a map of yields for bonds of the same type arranged by maturity.
• The policy rate directly affects the very short end, while long-term yields also reflect long-term growth, inflation, fiscal conditions, and supply and demand.
• A long-term yield can be approximated as the average of expected future short-term rates plus a term premium.
• The term premium is a model estimate rather than a directly observable number, and estimates can differ by model.
• A negative term spread means the curve is inverted, but inversion is not a guaranteed recession signal or a precise timer.
• Steepening and flattening must be combined with the direction of yields and classified as bull or bear moves.
• If an inversion disappears through recession-driven bull steepening caused by a sharp fall in short-term yields, the change can still be negative for stocks and corporate earnings.
• Even when government-bond yields fall, a wider credit spread can prevent the company's actual refinancing rate from declining.
• In company analysis, connect the yield curve to debt maturities, the fixed/floating mix, hedges, and FCF.

8. Three Review Questions

Question 1

If the two-year government-bond yield is 4.6% and the ten-year yield is 4.0%, what is the ten-year-minus-two-year spread, and what is the shape of the yield curve?

Question 2

Before a change, the two-year yield was 5.0% and the ten-year yield was 4.2%. After the change, the two-year yield is 4.0% and the ten-year yield is 3.8%. Calculate both term spreads and classify the move as bull or bear steepening or flattening.

Question 3

The expected policy-rate path barely changes, the two-year yield is almost unchanged, and only the ten-year yield rises sharply. At the same time, the outlook for government-bond issuance increases. Which yield component should be investigated first, and what three additional items should be checked when analyzing a highly leveraged company?

Answers and Explanations

1

\[ Ten-year-minus-two-year\ spread =4.0\%-4.6\% =-0.6\%p \]

The spread is negative, so this is an inverted curve in which the two-year yield is 0.6 percentage point higher than the ten-year yield.

2

Before the change:

\[ 4.2\%-5.0\% =-0.8\%p \]

After the change:

\[ 3.8\%-4.0\% =-0.2\%p \]

Both yields declined, and the short-term yield fell more. The spread rose from -0.8 percentage point to -0.2 percentage point, reducing the inversion. The curve steepened during a bond-market rally, so this is bull steepening. Additional evidence is needed to determine whether the driver was expected policy easing or recession concerns.

3

If the two-year yield, which is closer to the expected policy path, is stable while only the ten-year yield rises and expected government-bond supply increases, first investigate a higher term premium. Changes in long-term growth and inflation expectations should also be checked.

For a highly leveraged company, representative items include:

• Borrowing and bond maturities and refinancing amounts over the next one to three years
• The gap between the existing average rate and the current new-borrowing rate
• The fixed/floating mix and the use of interest-rate swaps or other hedges
• The corporate credit spread and credit-rating changes
• Whether OCF, FCF, and cash can cover interest and principal

Next Lesson Preview — Day 28:
“Why Do Bond Prices and Yields Move in Opposite Directions? — Reading Duration, Convexity, and Valuation Gains and Losses”