Inverted yield curve
Also written Negative yield curve
A yield curve on which short-term interest rates are higher than long-term rates — the reverse of the normal upward slope, read as a signal that the economy may go into recession.
In plain language
A yield curve plots the relationship between time to maturity and interest rate. Normally it slopes upward: an investor who lends for longer takes more risk and asks for a higher rate. The slope shows the extra risk premium for each additional period of time.
An inverted yield curve turns that upside down. Short-term rates are higher than long-term rates. A one-year instrument pays more than a ten-year one.
The workbook treats it as a warning light: it indicates the economy may go into recession, in which case the coupon on bonds to be issued in future would be low.
How it works
The four shapes in the workbook:
| Shape | What it looks like |
|---|---|
| Normal | Upward sloping — higher rates for longer maturities, because the risk premium is higher |
| Inverted | Short-term rates higher than long-term rates |
| Flat | Yield constant irrespective of maturity; no difference between short and long |
| Humped | Medium-term yields higher than both short-term and long-term yields |
Why a curve inverts — the two causes the workbook gives:
- Policy rates kept high to bring down excess demand and reduce bubbles, which pushes up short-term rates.
- Severe asset liability mismatch, which can also produce an inverted curve.
Why the normal curve is preferred. A positively sloped yield curve is the most preferred for the economy: short-term borrowing at a lower rate, long-term at a higher one. In the sovereign market the curve typically flattens after 5–7 years because default risk is zero and investors want only a small premium for liquidity risk; for corporate bonds the premium keeps rising with maturity.
What it means for fixed income decisions. If the inversion is signalling lower rates ahead, two workbook concepts come into play. Reinvestment risk — the risk that interest rates decrease during the life of a bond, so coupons and maturing money are reinvested at lower rates — rises for anyone sitting in short instruments. And bond prices move inversely to rates, with sensitivity measured by duration: a longer-duration holding gains more if rates fall.
A worked example
Illustrative yields — not current market data.
Suppose the government securities market shows:
| Maturity | Normal curve | Inverted curve |
|---|---|---|
| 1 year | 6.4% | 7.4% |
| 3 years | 6.8% | 7.1% |
| 5 years | 7.0% | 6.9% |
| 10 years | 7.2% | 6.8% |
On the inverted curve, a client with Rs 20,00,000 to park is tempted by the top line: the 1-year rate of 7.4% gives Rs 1,48,000 of interest in the first year, against Rs 1,36,000 at 6.8% on the 10-year.
The adviser's question is what happens in year two. The inversion is the market saying the economy may be heading for a recession, when future coupons would be low. If one-year rates have fallen to, say, 6.0% by the time the deposit matures, the rollover earns Rs 1,20,000 — and the two-year total of Rs 2,68,000 is below the Rs 2,72,000 the 10-year locked in. That shortfall is reinvestment risk.
The client who took the 10-year bond has the opposite exposure. If rates do fall, a long-duration bond rises in price; if they rise instead, it falls.
Neither choice is automatically right. What the curve changes is the conversation: the higher short-term rate is not free money, it is the price of the reinvestment risk that comes with it.
Why NISM asks about it
Chapter 9 (Investing in Fixed Income Securities), section 9.6 — Concept of Yield Curve — with reinvestment risk in 9.3.3 and duration in 9.7. Expect a question describing a curve ("short-term rates higher than long-term") and asking its name, the reasons for inversion (high policy rates, asset liability mismatch), and what it indicates (possible recession).
Common exam traps
- Inverted = short-term rates above long-term rates. Not "falling rates" in general.
- Humped is not inverted. In a humped curve the medium-term yield is the highest; short and long are both lower.
- Flat means yield is the same across maturities.
- The workbook gives two causes: policy rates kept high to curb excess demand and bubbles, and severe asset liability mismatch.
- The signal is possible recession, with lower coupons on future bond issues.
- The normal, positively sloped curve is the preferred one for the economy.
Where this is taught
Free preparation for NISM Series X-ARelated terms
- Interest rate riskThe risk that an investor in a debt instrument loses return because rates rise — existing instruments carrying the old, lower coupon fall in value until their yield matches the new market rate.
- Reinvestment riskThe risk that the coupons or other intermediate cash flows from an investment have to be put back to work at a lower rate than the original investment earned, pulling the total return below the promised yield.
- Yield to MaturityThe single discount rate at which a bond's future coupons and redemption amount add up to exactly its market price today — the return you actually earn if you hold it to maturity.
- Government SecurityA tradeable debt instrument issued by the Central Government or a State Government — treated as free of default risk, and the benchmark against which other rupee interest rates are priced.
- DurationA measure of how sensitive a bond's price is to changes in interest rates — the higher the duration, the larger the price swing for a given change in rates.
- Term structure of interest ratesInterest rate plotted against term — one curve per credit quality, with the risk-free curve as the base and every other borrower quoted as a spread over it.
- Roll downAn active fixed income strategy that profits from the passage of time: on an upward-sloping yield curve a bond's remaining maturity shortens, its yield falls, and its price rises.