Part 3 · Interest rates: the price of money · Lesson 16
Term spread: the traffic light of the economy
The gap between short and long rates is a map of the future drawn by the market. When this gap flips upside down, it is read as a red light for the economy.
QToday's question
News says short-term rates have risen above long-term rates. Why is that called a "recession signal"?
Normally, the longer you lend money, the more interest you get. But sometimes a strange thing happens: the 2-year Treasury yield rises above the 10-year yield. The news calls this a "yield curve inversion" and worries about a recession. In this lesson we look step by step at why this signal appears, how well it has worked, and where it missed.
MAPLearning map for this lesson
We build it up in three steps. At the end of each step, a 'Quick check' lets you test your understanding before moving on.
We use "market rates price in future policy rates" from Lesson 14, Policy rate vs market rate, and "maturity" and "bond yield" from Lesson 15, Bond prices and rates are a seesaw, as they are. "Recession" from Lesson 5, The economy has four seasons too, appears again as well.
- STEP 1 · Core conceptA line connecting rates by maturity
You can read a and explain why long rates are normally higher than short rates (term premium and expectations of future rates).
- STEP 2 · Understanding the mechanicsWhy does inversion happen and what does it say?
You can calculate the and explain how rapid central bank hikes and expected future cuts create a .
- STEP 3 · Real-world application50 years of records and the signal's limits
You can read the lag between past inversions and recessions, and, considering cases where the signal missed, such as the 2022–2024 inversion, use it as a "warning signal" rather than a "timing tool."
STEP 1A line connecting rates by maturity
In Lesson 15 we saw that every bond has a different maturity. If you connect the yields of Treasuries with different maturities in a single line, you start to see the future that the market is drawing.
What is a yield curve?
The US government issues Treasuries with many maturities, from 3 months to 30 years. Plot each Treasury's on a graph with maturity on the horizontal axis and the rate on the vertical axis, connect the points, and you get a . The "2-year" and "10-year" in the news are each one point on this curve. The represents the front of the curve and the the back.
Normally this curve slopes upward to the right. There are two main reasons. First, the longer you tie up your money, the more you bear the risk of not knowing how prices and interest rates will change in the meantime, so you receive more interest in return. This is called the . Second, if the economy is growing, it is easy to expect the policy rate to be higher in the future than it is now. As seen in Lesson 14, market rates price in expectations for future policy rates.
An easy analogy · a 1-year deposit and a 3-year deposit
At a bank, it is natural for a 3-year time deposit to pay a higher rate than a 1-year one. It is compensation for the inconvenience of not being able to use your money for longer. But what if one day the bank posts "1 year at 5%, 3 years at 4%"? You might guess, "The bank thinks rates will fall." An inverted yield curve is the same story.
See it in a picture: four faces of the curve
Press the buttons below to compare what the actual US Treasury yield curve looked like on different dates. The dotted line is the first curve you picked, so you can compare how the shape changed.
US Treasury yield curve (3 months to 30 years)
Source: US Treasury, FRED DGS3MO, DGS1, DGS2, DGS5, DGS10 and DGS30 daily values. Horizontal axis spacing is kept even for readability. Retrieved as of 2026-10-05.
Quick checkIf the 3-month yield is 4.2%, the 2-year is 4.8% and the 10-year is 5.3%, what shape is this curve?
STEP 2Why does inversion happen and what does it say?
Drawing the whole curve every time is cumbersome. So the market summarizes the shape with a single number: the difference between two points, the front and the back of the curve.
Term spread = 10-year yield − 2-year yield
If the value is positive, the curve is normal (upward sloping); near 0 it is flat; and negative means inverted. Inversion means the market thinks "rates are high now, but will fall later."
Let's calculate it ourselves
- March 31, 202110-year 1.74% − 2-year 0.16% = +1.58 pp (steep, normal)
- July 3, 202310-year 3.86% − 2-year 4.94% = −1.08 pp (the deepest day of this inversion)
- October 1, 202610-year 5.24% − 2-year 4.78% = +0.46 pp (normal again)
Source: FRED DGS10, DGS2, T10Y2Y (US Treasury). Because of rounding, figures can differ from the FRED T10Y2Y value by 0.01 percentage points.
Two forces that create an inversion
Inversion occurs when the front and the back of the curve move for different reasons.
The front: the central bank pulls it up
The 2-year yield almost directly reflects expectations for the over the next two years. As seen in Lesson 13, when the central bank raises rates quickly to contain inflation, the 2-year yield soars with it. In 2022 the US 2-year yield jumped from 0.73% to 4.41%.
The back: the market worries about the future
The 10-year yield contains rate expectations for the distant future. If the market thinks "rates this high will cool the economy, and then rates will be cut again in a few years," the 10-year yield rises less. In the same year the 10-year yield rose from 1.52% to 3.88%, less than the 2-year.
So an inversion is read as the market's collective expectation that "today's tightening will eventually break the economy." There is also a path by which the inversion itself weighs on the economy. Banks generally borrow short (deposits) and lend long (loans). When short rates rise above long rates, the margin on this business shrinks, banks become pickier about lending, and when less money circulates, investment and consumption cool. It is the circular flow of money in Lesson 2 slowing down.
There is more than one way to measure the term spread. The most common in the news is the 10-year minus the 2-year, but the Federal Reserve Bank of New York calculates and publishes recession probabilities from the 10-year minus the 3-month difference. The two measures generally move in the same direction but invert on slightly different dates.
Common misconceptions
- "A recession arrives right after an inversion?"
- No. In the US in the past, it took as little as 6 months and as much as 2 years from the start of an inversion until a recession arrived, and in some cases no recession came at all. We check this in a table in STEP 3.
- "Stock prices keep falling during an inversion?"
- No. On Jul 6, 2022, the day the inversion began, the S&P 500 was at 3,845.08, and on Aug 26, 2024, as the inversion was ending, it was at 5,616.84, about 46% higher (FRED SP500). An inversion is not an indicator of the short-term direction of stock prices.
Quick checkA central bank is raising rates quickly. If the 2-year yield rises a lot and the 10-year yield barely moves, how does the term spread change?
STEP 350 years of records and the signal's limits
Now that you know the mechanics, it is time to look at the report card. Let's check on a 50-year graph how well this signal actually worked and where it missed.
See it in a graph: the term spread and recessions
The stretches where the blue line drops below 0 are inversions, and the gray bands are the US's official recession periods. Tap the graph to see that month's spread.
US term spread (10-year − 2-year) monthly average, Jan 1977 – Sep 2026
Tap the graph.
Source: FRED T10Y2Y (daily values averaged by month), USREC (National Bureau of Economic Research, NBER, business cycle dates). Retrieved as of 2026-10-05. NBER has not dated a new recession through September 2026.
Time from inversion to recession
| Inversion start | Recession start (cycle peak) | Time elapsed |
|---|---|---|
| Aug 1978 | Jan 1980 | About 17 months |
| Dec 1988 | Jul 1990 | About 19 months |
| May 1998 (brief inversion of about 2 months) | None within 2 years | Missed |
| Feb 2000 | Mar 2001 | About 13 months |
| Dec 2005 | Dec 2007 | About 24 months |
| Aug 2019 (brief inversion of a few days) | Feb 2020 | About 6 months · COVID shock |
| Jul 2022 (through Aug 2024) | None through September 2026 | No recession for over 50 months |
The inversion start is the day FRED T10Y2Y first dropped below 0 (for 2022, an inversion that continued from Jul 6 after a brief inversion on Apr 1–4), and the recession start is the cycle peak month dated by NBER.
The table shows that a recession followed an inversion in many cases, but the lag varied from 6 months to 2 years. The 2020 recession was caused by an external shock, the pandemic, so it is hard to say the inversion "predicted" it. Another point worth noting is that the 1990, 2001 and 2008 recessions all began within a few months after the inversion ended. The spread turned positive in March 1990, December 2000 and June 2007, respectively. When the central bank sees the economy slowing and starts cutting rates, the 2-year yield falls first and the inversion unwinds, but by then the economy was already turning down.
2022–2024: the longest inversion, but no recession
The inversion that began on Jul 6, 2022 lasted 782 days until Aug 26, 2024. It is the longest continuous inversion since FRED data began in 1976. In the summer of 2023, the New York Fed model's 12-month-ahead recession probability rose as high as 66%. Yet through September 2026, no recession dated by NBER had arrived. Many interpretations hold that household savings built up after COVID, debts that companies and households had locked in earlier at low rates, and a solid labor market absorbed the shock of high rates. The inversion turned positive again in September 2024, and on Oct 1, 2026 the spread is +0.46 percentage points.
The lesson from this case is not to throw the signal away but not to trust it alone. The term spread becomes more meaningful when viewed together with the leading indicators of Lesson 6 and the employment indicators we cover in Lesson 19.
Three questions for reading the spread in the news
- SignIs it positive or negative right now? If negative, it means the market expects rate cuts ahead, that is, an economic slowdown.
- Who movedDid the 2-year move, or the 10-year? If the 2-year moved a lot, it was expectations for the central bank; if the 10-year moved, long-term growth and inflation expectations or the term premium changed.
- DirectionIs the inversion deepening or unwinding? If the 2-year falls quickly as the inversion unwinds, it can be a sign that the central bank has begun responding to a slowdown.
For stocks, it goes like this
The term spread touches both knobs of Lesson 1. As an inversion deepens, the market worries about a coming slowdown, that is, the possibility that the earnings knob weakens. At the same time, the shape of the curve affects each sector differently.
What tends to be relatively favorable when the curve steepens (spread widens)
Banks · cyclical sectors
Banks that borrow short and lend long see wider margins the larger the spread (Lesson 18). When the curve steepens on expectations of an economic recovery, the cyclical sectors of Lesson 5 tend to draw attention.
What becomes cautious when an inversion deepens
Loan-dependent · cyclical earnings
When bank margins shrink and lending gets stricter, sectors that rely on debt and sectors whose earnings swing widely with the economy tend to come under pressure. At such times, attention often shifts to relatively defensive sectors.
You can check what phase interest rates and sectors are in now on the Macro Map, and the release dates of indicators that move the curve, such as US employment and inflation, on the Earnings & Economic Indicators calendar.
The term spread is only a reference indicator for gauging the possibility of a recession, and does not tell you the direction of stock prices or when to trade. There is no guarantee that past relationships will repeat the same way, and this lesson does not recommend buying or selling any particular stock or ETF.
Quick checkAn inversion that lasted two years has just unwound. Can you conclude, "Recession worries are now over"?
✓What we learned today
- The line connecting Treasury yields by maturity is the yield curve. Normally it slopes up to the right because of the reward for tying up money for longer (the term premium).
- Term spread = 10-year − 2-year. The 2-year reflects expectations for the policy rate over the next two years, and the 10-year reflects long-term growth, inflation and distant-future rate expectations.
- When the central bank raises rates quickly but the market thinks "the economy will cool later and rates will be cut again," short rates rise above long rates, creating an inversion.
- In the US since 1978, a recession came 6 to 24 months after an inversion began in many cases, but after the longest inversion in history, from July 2022 to August 2024, there was no official recession through September 2026.
- An inversion is not a clock that tells you "when" but a traffic light that says "be careful." It should be read together with when the inversion unwinds, and with employment and leading indicators.
We have seen how interest rates shake bonds and economic signals. In the next lesson we check directly with present value calculations why the same rates hurt stocks, especially growth stocks, more.
Quiz5-question quiz
Pick an answer and it's graded right away with an explanation.
Q1. The 10-year yield is 4.0% and the 2-year yield is 4.5%. Which gives the correct term spread and curve shape?
The 10-year minus the 2-year is 4.0 − 4.5 = −0.5 percentage points. Short rates are higher, so it is an inversion.
Q2. What is the best reason the yield curve normally slopes up to the right?
The longer you lend, the more you bear the risk of changes in prices and interest rates in the meantime, so you get more interest. When the economy grows, expectations that future rates will be higher add to it as well.
Q3. What was the most direct reason the US term spread inverted in 2022?
The 2-year yield jumped from 0.73% to 4.41% following policy rate expectations, and the 10-year rose less, from 1.52% to 3.88%. The market thought high rates would eventually cool the economy and be cut later.
Q4. Historically in the US, how long did it generally take from the start of an inversion to a recession?
In the cases since 1978 the lag was wide, from 6 to 24 months, and there were also cases where no recession came, as in 1998 and 2022–2024.
Q5. What is the best lesson from the long 2022–2024 inversion?
Even after the longest inversion in history, 782 days, there was no recession through September 2026. It is more important to view the signal together with other indicators than to discard it.
NextTerms · Next lesson · Related tools
The curve connecting government bond yields by maturity is called the yield curve, and the long-term rate minus the short-term rate is called the term spread. When the spread turns negative (inverted), it is often read as a sign of an economic slowdown.
Term spreadTerm spreadThe difference between long-term and short-term rates. Usually the 2-year (or 3-month) yield is subtracted from the 10-year Treasury yield. If negative, it is an inversion.
Yield curve inversionYield curve inversionA state where short-term rates are higher than long-term rates. It means the market expects rates to fall ahead, and it has often appeared before past recessions, but it has not always been right.
Term premiumTerm premiumThe part added to long-term rates as compensation for the risk of having money tied up for a long time. It grows when inflation outlooks are uncertain or government debt rises quickly.
US 2-year Treasury yield2-year Treasury yieldThe interest rate when the US government borrows for two years. It moves most sensitively to expectations for the Fed's policy rate over the next one to two years.
10-year Treasury yield10-year Treasury yieldThe interest rate when a government borrows for a 10-year term. The US 10-year yield is used as a benchmark rate for asset prices worldwide.
Bond yieldBond yield (YTM)The annual return you earn when you buy a bond at today's market price and hold it to maturity. The '10-year yield' in the news is this. When the price falls, the yield rises.
Policy ratePolicy rateThe policy interest rate set by a central bank (the Bank of Korea, the US Fed). It is the starting point for all other interest rates.
RecessionRecessionA state in which economic activity such as output, income and jobs visibly shrinks for a considerable period. It is often described as 'two consecutive quarters of falling real GDP', but the official declaration takes multiple indicators into account.
Leading indicatorLeading indicatorAn indicator that moves ahead of the actual economy. Stock prices, the PMI and the term spread are typical examples.
This is educational material and not investment solicitation. There is no guarantee that past relationships will repeat in the future.