Inverted yield curve

Also called: Yield curve inversion · Topic: Financial Markets, Instruments, Insurance and Pensions · NCERT: Beyond NCERT

Meaning

An inverted yield curve is a situation where short-term bonds give a higher yield than long-term bonds of the same credit quality, usually government securities. This is the opposite of the normal pattern.

• Formula: Term spread = Long-term yield − Short-term yield. The curve is inverted when the term spread is negative. A common measure is the US 10-year yield minus the 2-year yield.
• Why it matters: markets read an inverted curve as a warning that growth will slow and a recession may come. That is why it is watched closely and often in the news.

Explanation

How a yield curve is drawn

• Yield curve = a graph of yields on bonds of the same credit quality (usually G-secs) across different maturities.
• The horizontal axis shows maturity, for example 91 days, 1 year, 10 years or 40 years.

• The vertical axis shows the yield, which is the return an investor actually earns.

• Because the borrower is the same, the curve shows only the effect of time, not the risk of default.

• Three shapes:
• Normal (upward-sloping): long bonds yield more. Investors want a term premium (extra pay for locking money away longer) and a liquidity premium (extra pay because the bond is harder to sell quickly).
• Flat: short and long yields are about equal. This often happens when the economy is changing phase.
• Inverted: short-term yields are above long-term yields.

Why the curve inverts

• Step 1: the central bank raises short-term rates.
• Inflation is high, so the central bank raises its policy rate.

• Short-term bond yields rise quickly, because they follow the policy rate closely.

• Step 2: markets expect rate cuts later.

• Investors think the high rates will slow the economy.

• Slower growth means the central bank will probably cut rates later.

• Step 3: long yields fall below short yields.

• Investors rush to lock in today's long-term rates before cuts come.
• Demand for long bonds pushes their prices up.

• Bond prices and yields move in opposite directions, so long yields fall.

• Result: short yields > long yields, so the curve is inverted.

Worked example (illustration)

• Suppose a 91-day T-bill is issued at Rs 98.20 against a face value of Rs 100.

• Annualised yield ≈ (1.80/98.20) × (365/91) ≈ 7.35% [1].

• Suppose a 10-year G-sec yields 6.5%.

• Term spread = 6.5% − 7.35% = −0.85 percentage points (−85 basis points).
• The spread is negative, so the curve is inverted.

Why investors buy long bonds even when they yield less

• Long bonds' prices move much more when rates change (illustration, zero-coupon bonds with face value Rs 100):
• 1-year bond: Rs 95.24 at 5% becomes Rs 94.34 at 6%. The change is about 0.9%.

• 10-year bond: Rs 61.39 at 5% becomes Rs 55.84 at 6%. The change is about 9%.

• This works in reverse as well. If investors expect rates to fall, a long bond gives a big capital gain (profit from a rise in price).

• So investors accept a lower yield on long bonds today because they expect price gains when rates are cut.

In India

• Who issues and manages the curve: the RBI manages the government's borrowing. It issues G-secs across many maturity buckets, which builds a yield curve that runs up to 40 years [1].
• Short end: Treasury Bills in 91-day, 182-day and 364-day tenors. They are zero-coupon [1].

• Long end: dated securities, which usually mature in 5 to 40 years and pay interest every half-year [1].

• Benchmark: the 10-year G-sec yield is India's reference rate. Corporate bonds and long-term loans are priced from it. So the slope of the curve affects what companies and State governments pay to borrow.

• STRIPS: these are sovereign zero-coupon pieces made by splitting existing G-secs into separate coupon and principal parts. They help build a market-based zero-coupon yield curve [1].
• Global example: the US 10-year minus 2-year yield stayed inverted through 2022-24, after the US central bank raised rates sharply.
• Bank angle: when rates rise quickly, banks' bond holdings lose value. Under the RBI's investment norms in force from 1 April 2024, bonds classed as AFS send their gains and losses to an AFS-Reserve, bonds classed as HTM are not marked to market, and FVTPL changes go straight to the P&L [2].

Don't confuse with

• Normal yield curve: long yields are higher than short yields because of term and liquidity premiums. This is the usual, healthy shape. An inverted curve is the opposite.
• Flat yield curve: short and long yields are about equal. It often comes before or after an inversion, but the spread is close to zero, not negative.
• Credit spread: the extra yield a riskier bond pays over a G-sec of the same maturity. It compares risk. The yield curve compares maturity for the same risk.
• Coupon rate: the fixed payment printed on the bond as a % of face value. The yield curve plots yields (market returns), not coupon rates.

Prelims Hooks

• An inverted yield curve means short-term yields > long-term yields on bonds of the same credit quality. It is read as a warning of recession.
• The cause is that markets expect the central bank to cut rates later because growth will slow. Trap: an inversion does not mean long-term bonds have become riskier.
• Bond prices and yields move in opposite directions. When demand for long bonds rises, their prices go up and their yields fall, which pulls the long end of the curve down.
• India's G-sec yield curve runs up to 40 years. T-bills (91/182/364-day) form the short end [1].
• STRIPS help build a market-based zero-coupon yield curve [1]. India's benchmark long rate is the 10-year G-sec yield.
• The US 10-year minus 2-year spread stayed inverted through 2022-24.

Mains Points

• Yield curve as an early-warning signal for policy. The slope of the curve shows what markets expect for growth and inflation.
• An inversion tells the RBI and the government that markets expect a slowdown.

• Policymakers can use it together with GDP, credit and inflation data. On its own it predicts a recession but does not guarantee one.

• Rate cycles and bank stability. Inversions usually follow sharp rate hikes, and rate hikes cause mark-to-market losses on bonds (losses from valuing bonds at today's lower price).

• Banks borrow short (deposits) and lend long (loans). A flat or inverted curve squeezes the gap between what they earn and what they pay.
• Silicon Valley Bank (March 2023) held long bonds bought when rates were low. Rates rose, the bank faced large unrealised losses, depositors pulled out their money, and the bank collapsed.

• The RBI's 2023 framework (HTM / AFS / FVTPL) smooths reported profits [2], but supervisors must still track interest-rate risk, not just credit risk.

• Link to fiscal policy (GS-III). Heavy government borrowing pushes up long-term G-sec yields and makes companies' borrowing costlier ("crowding out"). This changes the shape of the curve.

• Fiscal consolidation (cutting the deficit step by step) and a better sovereign rating, such as S&P's upgrade of India to BBB in August 2025 [3], lower the risk premium on Indian debt. This helps keep long-term borrowing cheaper.

Related concepts

• Bonds
• Coupon rate
• Present value
• Bond price and interest rate inverse relation
• Capital gain
• Zero-coupon bond
• Floating rate bond
• Mark-to-market
• Yield curve
• Credit rating

Read more

• Bond basics: present value, coupon, yield and the yield curve