A yield curve plots bond yields across different maturities and helps investors understand economic conditions and interest rate expectations, while shifts in the curve signal where it may be headed next.
By the time you reach this chapter, you would have already covered a significant amount of ground. You know what bonds are, how to buy and sell them, taxation, and how to deploy various bond strategies.
However, when you start following the bond market regularly, more often than not, you’ll come across terms like ‘yield curves’, ‘shifts in the curve’, etc. These terms may sound technical at first, but they can help you interpret what the market is signaling and make more informed investment decisions.
In the last chapter of this series, we will discuss bond market concepts to help you interpret various bond market news and understand what is actually being said.
Yield Curve Basics and Types Explained
Of all the tools and methods used to analyze the bond market, the yield curve is the one you will come across most often when reading financial news or hearing commentaries of various analysts.
What Is a Yield Curve?
A yield curve is a graphical representation that plots the yield of bonds with identical credit ratings across different maturity periods. On the chart, the Y-axis represents yield as a percentage (%), and the X-axis represents the maturity period of the bonds. For example, a yield curve may plot the yields of two government securities maturing in 5-year and 10-year periods, respectively, reflecting how the market is pricing in future interest rates and economic conditions in India at the moment.
Generally, a yield curve can take four shapes, each one telling a different story about where the economy stands. Let’s have a look.
Normal Yield Curve ![]()
A normal yield curve is always upward-sloping, indicating that long-term yields are higher than short-term yields.
It is the most common type of yield curve, which reflects a healthy, growing economy. The logic behind its formation is simple: the yield curve slopes upwards when investors demand a higher return as they are lending money for a longer period. The higher return reflects the additional risk investors take over longer durations, as inflation may rise, interest rates may change, or economic conditions may shift over time.
Steep Yield Curve
A steep yield curve can be referred to as an exaggerated version of the normal curve. Wherein, the gap between the short-term and long-term yields is wider than usual.
This type of yield curve typically appears in the early stages of an economic recovery or after a period of policy easing. Because short-term yields may stay low when monetary policy remains accommodative, while long-term yields rise as investors begin pricing in stronger future growth, higher inflation, and eventual rate hikes.
Flat Yield Curve
A flat yield curve suggests that yields across all maturities are converging within a very narrow range. Meaning, both short-term yields and long-term yields are offering almost the same returns.
For example, if a 2-year G-sec yields 6.8%, a 5-year yields 6.9%, and a 10-year yields 7.0%, the difference is minimal. This signals that markets are uncertain about the direction of the economy. Investors are not willing to make a strong bet on either end of the curve.
Inverted Yield Curve
This type of yield curve signals that investors are worried about near-term economic conditions. One reason for inversion is declining confidence in short-term growth, which drives investors toward long-term bonds for safety. That demand pushes long-term bond prices up and yields down, while short-term yields remain elevated due to existing policy rates, resulting in an inversion of the yield curve.
In India, a sustained yield curve inversion is exceptionally rare compared to the US; while the US 10-year/2-year spread has historically stayed inverted for years, the Indian curve more commonly flattens or briefly inverts at the short end (e.g., 364-day T-bills vs 10-year G-Secs) due to liquidity deficits and aggressive RBI tightening, rather than signaling an imminent recession.
So far, we’ve looked at yield curves as if they were static. But in reality, they are constantly evolving as economic conditions and policy expectations change. To understand this movement, it’s important to look at yield curve shifts.
What are Yield Curve Shifts?
While the yield curve types tell you what the curve looks like at a point in time, yield curve shifts tell you how and why they are moving over time.
A yield curve shift represents a change in yields across maturities over time, reflecting how markets are actively repricing interest rate expectations, the inflation outlook, and economic conditions. Broadly, these movements follow 4 identifiable patterns.
Parallel Shift
A parallel shift occurs when yields across all maturities move in the same direction by roughly the same amount. So, the shape of the curve stays the same, but it resets to a higher or lower value.
An upward parallel shift means yields have risen across the board (bond prices fall), and it is typically driven by inflation surprises or a more hawkish central bank.
A downward parallel shift means yields have fallen across all maturities (bond prices have risen); it is driven by rate-cut expectations amongst investors.
Steepening Shift
A steepening shift occurs when the gap between short-term and long-term yields widens and the curve becomes steeper.
There are two ways this can happen:
- Bullish steepening
In a bullish steepening, the short-term yields fall faster than long-term yields. This signals expectations of near-term rate cuts while long-term inflation or growth expectations hold steady. Good for short-duration bond holders.
- Bearish steepening
In a bearish steepening, the long-term yields rise faster than the short-term yields. This typically signals concerns about inflation, rising government borrowing, or investors demanding higher compensation for holding long-duration bonds.
Flattening Shift
A flattening shift is completely opposite from the steepening shift. Here, the gap between short-term and long-term yields narrows.
Again, it can be interpreted in two ways:
- Bull flattening
In a bull flattening, the long-term yields fall faster than short-term yields, often reflecting investor expectations of slowing growth pulling the long end down.
- Bear flattening
In a bear flattening, the short-term yields rise faster than long-term yields, usually when a central bank is hiking rates aggressively while the long end stays anchored by expectations of an eventual slowdown.
Curvature Shift (Butterfly Shift)
A curvature (or butterfly) shift refers to changes in the middle of the yield curve relative to the short and long ends.
- Positive butterfly
The curve becomes less “humped”. This happens when short- and long-term yields rise by a greater magnitude than mid-term yields. Because the wings (short and long end) move up more than the body (mid-term), the curvature of the curve decreases, making it less humped.
- Negative butterfly
The curve becomes more “humped”. This occurs when short- and long-term yields decrease by a greater degree than mid-term yields, making the middle of the curve appear more elevated relative to the ends, thereby increasing the curvature of the curve.
Unlike other yield curve shifts, a curvature shift signals less about overall economic direction and more about how different segments of the curve are priced relative to each other.
Conclusion
Yield curves and their shifts reflect what the market says in real time. Every change in its shape or slope reflects how millions of investors collectively price in growth, inflation, and uncertainty at any given moment.
The yield curve is one of the last basic topics to learn about bonds. The bond market consists of various other concepts we will cover in the series to come.
And with this, we end this series here. Your bond investing journey, however, is just getting started. To use what you have learnt so far, and increase your knowledge about other investing concepts, you can visit Jiraaf.
