Yield curve inversion explained: the 2s10s spread, its recession record and its limits

A yield curve inversion happens when short-term government bond yields rise above long-term yields, so that lending to the government for two years pays more than lending to it for ten. The most quoted measure is the 2s10s spread, the 10-year Treasury yield minus the 2-year yield; when it falls below zero, the curve is said to be inverted. In the United States, inversions have come before every recession since the late 1970s, but with long and variable lags, and the signal has real limits.

The basics of yields, prices and curve shapes are covered in bonds and yields explained. This guide goes further into inversion specifically: why it happens, how different measures compare, what the record shows, why the 2022 to 2024 episode was unusual, and how traders across asset classes read it.

What the yield curve is

The yield curve plots the yields on a government's bonds against their maturities, from a few months to thirty years. Normally it slopes upwards: investors want a higher yield to lock money away for longer, because they bear more risk from inflation and rate changes over a longer period. The extra yield for longer maturities is often called the term premium.

Different parts of the curve respond to different things:

• The short end (three months to two years) is anchored by the central bank's policy rate and expectations for it over the next year or two.
• The long end (ten to thirty years) reflects expected average short-term rates over a long horizon, plus the term premium, which in turn reflects inflation uncertainty, the supply of bonds and demand from investors such as pension funds.

An inversion means the short end has risen above the long end. That requires the market to expect short-term rates to fall in future, by enough to outweigh any term premium.

Why curves invert

The typical sequence looks like this:

1. Inflation rises, and the central bank raises its policy rate to bring it down.
2. Short-term yields follow the policy rate up.
3. Investors expect that tight policy will slow the economy and that the central bank will eventually have to cut rates.
4. Long-term yields rise less than short-term ones, or fall, because they average over a future that includes those expected cuts.
5. The short end rises above the long end, and the curve inverts.

The process is described in more detail in central banks and interest rates. The inversion is the bond market's collective expectation, expressed in prices, that current policy is restrictive and will not last.

Measuring inversion

There is no single official measure. The commonly used ones are:

• 2s10s: the 10-year yield minus the 2-year yield. It is widely quoted by market commentators and easy to follow on most data services.
• 3m10y: the 10-year yield minus the 3-month Treasury bill yield. The Federal Reserve Bank of New York uses this spread in its model of recession probabilities, and much of the academic work on the curve uses it too.
• Near-term forward spread: a measure proposed by Federal Reserve economists that compares the expected 3-month rate six quarters ahead with the current 3-month rate. It focuses on whether markets expect cuts in the near term.

Spreads are measured in basis points, where 100 basis points equal one percentage point.

Worked example: calculating the spreads

Illustrative yields only, not current market levels.

• 3-month bill: 5.30%
• 2-year note: 4.70%
• 10-year note: 4.40%

Then:

• 2s10s = 4.40 − 4.70 = −0.30 percentage points, or −30 basis points.
• 3m10y = 4.40 − 5.30 = −0.90 percentage points, or −90 basis points.

Both are inverted, but by very different amounts. The 3-month yield sits close to the current policy rate, while the 2-year yield already reflects expected cuts over the next two years. That is why the two measures can disagree: the 2s10s can turn positive while the 3m10y is still deeply inverted, if markets expect cuts soon but the central bank has not yet delivered them. A headline saying the curve has un-inverted needs a check on which spread it means.

The recession record

What the record shows

In the US, the yield curve inverted before each of the recessions that began in 1980, 1981, 1990, 2001, 2007 and 2020. The time between the first inversion and the start of the recession has varied a lot, from several months to around two years. That record is the main reason inversion is watched so closely.

The 2020 recession is often treated as a special case, because it was caused by the pandemic, which no bond market could have foreseen; the curve had inverted briefly in 2019 for unrelated reasons. Some count it as a hit; others call it a coincidence.

Why the signal might work

There are a few explanations, and they are not mutually exclusive:

• Expectations. An inversion records the market's view that rates will be cut, and central banks usually cut rates sharply in recessions. In that sense the curve is reporting a forecast rather than causing anything.
• Tight policy bites. Inversions typically happen when policy is restrictive. Restrictive policy slows credit and demand, so the inversion is a marker of conditions that tend to come before downturns.
• Bank lending. Banks often borrow short and lend long. When short rates exceed long rates, the margin on new lending shrinks, which can make banks more cautious about extending credit.

Why the record is weaker than it sounds

• Small sample. Six recessions since the late 1970s is very little data. A pattern that has worked six times is suggestive, not proven.
• Variable lags. A signal that might mean a recession in eight months or in twenty-four is of limited use for timing anything.
• Defining the start. In the US, recession dates are set after the fact by the National Bureau of Economic Research's Business Cycle Dating Committee, often many months later. In real time, nobody knows whether a recession has started.
• Changing term premium. Years of central bank bond buying, known as quantitative easing, and strong demand for long bonds from pension funds and foreign investors may have held long yields down. A lower term premium makes inversion easier to reach and may weaken its meaning.
• Other countries. The record is strongest for the US. Curves in other countries have inverted for different reasons, and their link to local recessions is less consistent.

The 2022 to 2024 inversion

The episode that began in 2022 is the main reason for current scepticism about the signal.

As the Federal Reserve raised rates rapidly to fight inflation, the 2s10s spread inverted briefly around the end of March 2022 and then continuously from early July 2022. In March 2024 Reuters reported that the inversion had become the longest on record, beating a run that began in 1978. The 3m10y spread inverted later in 2022 and became deeply negative in 2023. The 2s10s spread returned to positive territory in the second half of 2024, as markets priced and the Fed began delivering rate cuts.

Through that whole period, the US economy kept growing and no recession was declared by the NBER. Explanations offered for the miss, or the very long lag, include:

• Strong household and corporate balance sheets after the pandemic, with many borrowers having locked in low fixed rates before 2022.
• Fiscal support and high government spending.
• The term premium, which some estimates suggested was unusually low when the inversion began.
• The nature of the inflation shock, driven partly by supply disruptions that eased without a deep demand slump.

The curve also inverted in other major economies during this period, including Germany and the UK, as their central banks raised rates too.

None of this proves the signal is broken. It shows that inversion is a statement about expected policy and the cost of credit, not a timer.

Un-inversion: how the curve steepens matters

Historically, recessions have often begun not during the inversion but around the time the curve started to steepen again. That has led to a focus on how un-inversion happens. Analysts describe curve moves with four labels:

• Bull steepening: short yields fall faster than long yields. Usually happens when the market expects, or the central bank delivers, rate cuts. Bond prices rise, which is the bull part.
• Bear steepening: long yields rise faster than short yields. Often linked to concerns about inflation, government borrowing or a rising term premium.
• Bull flattening: long yields fall faster than short yields, often when long-term growth or inflation expectations fall.
• Bear flattening: short yields rise faster than long yields, typical of a hiking cycle, and the usual route to inversion.

Worked example: same spread, different story

Illustrative numbers. Start with a 2-year yield of 4.85% and a 10-year yield of 4.05%. The 2s10s spread is 4.05 − 4.85 = −80 basis points.

Scenario A, bull steepening: the 2-year falls 75 basis points to 4.10% and the 10-year falls 25 basis points to 3.80%. New spread: 3.80 − 4.10 = −30 basis points. The curve has steepened by 50 basis points because the market is pricing rate cuts, which can happen when growth is weakening.

Scenario B, bear steepening: the 2-year stays at 4.85% and the 10-year rises 50 basis points to 4.55%. New spread: 4.55 − 4.85 = −30 basis points. The same 50 basis point steepening, but driven by long yields rising, perhaps on inflation or fiscal worries. Rates are not expected to fall; long-term borrowing has become more expensive.

The spread ends in the same place, but the two scenarios have different implications for bond prices, equities and currencies. Looking at the levels as well as the spread avoids that mistake.

What inversion means for different markets

Bonds

An inversion means holding short-term bills pays more than holding longer bonds, ignoring price changes. Investors who buy long bonds in an inversion are accepting lower yield in exchange for potential price gains if rates fall. For traders using bond futures or CFDs, the curve shape affects how the front and back of the market move; the guide to bond CFDs on the Bund, Gilt and Treasuries covers the practicalities.

Currencies

Inversions usually happen when the central bank has raised rates more than others. Higher short-term yields can support a currency, as described in what moves currency prices. When the market starts pricing cuts and the curve bull-steepens, the short-term yield advantage can narrow, and with it some of that support. The relationship is loose and depends on what other central banks are doing at the same time.

Equities

Equity markets have often kept rising for a long time after an inversion, which is one reason inversion is a poor timing tool for shares. Sector effects are more consistent: banks and other lenders are sensitive to the slope of the curve because it affects lending margins. The guide to sector rotation covers how sectors respond to the economic cycle, and stock market crashes in history puts past downturns in context.

Volatility

Recessions and the run-up to them are often periods of higher volatility in equities and credit. The VIX guide explains how that is measured for the US stock market.

How to follow the curve

• Use official data. Treasury yields are published daily by the US Treasury, and many data services chart the 2s10s and 3m10y spreads.
• Watch both spreads. If one is positive and the other negative, find out why.
• Watch the levels. Note whether a steepening is coming from the short end or the long end.
• Watch central bank communication. The short end moves with expected policy, so forward guidance and the economic data that shape it matter. The economic calendar guide explains how to track scheduled releases.

Common mistakes

• Treating inversion as a timer. The lag has ranged from months to years.
• Assuming un-inversion means the danger has passed. Historically, recessions have often started around the time the curve steepened again.
• Mixing up measures. The 2s10s and 3m10y spreads can give different readings at the same time.
• Ignoring how the curve moved. Bull and bear steepening say different things.
• Extrapolating from the US. The record is mainly a US one; other curves have different histories.
• Trading the headline. Inversion is widely known and widely reported. It is information about expectations, not a hidden edge, and no single indicator justifies an outsized position.

If you trade bond, index or currency CFDs on macro themes like this, remember that most retail CFD accounts lose money; the risk warning explains why leverage magnifies losses.

Frequently asked questions

What does an inverted yield curve mean?

It means short-term government bonds yield more than long-term ones. It usually reflects a central bank that has raised rates to restrain inflation and markets that expect rates to be cut later. In the US, inversions have preceded every recession since the late 1970s, but with long and variable lags.

What is the 2s10s spread?

It is the yield on 10-year government bonds minus the yield on 2-year bonds, usually quoted in basis points for US Treasuries. A positive number means a normal upward slope; a negative number means the curve is inverted between those two maturities.

How long after an inversion does a recession start?

Historically, anywhere from several months to around two years in the US, and in the 2022 to 2024 episode no recession was declared during the inversion at all. That variability is why the curve is a poor timing tool.

Is the yield curve still a reliable recession indicator?

It has a strong historical record in the US but a small sample, and the long inversion from 2022 to 2024 was not followed by a declared recession in that period. Many economists still watch it as one indicator among several, while treating changes in the term premium and the reasons for an inversion as important context.

Why does the yield curve un-invert?

Usually because short-term yields fall as markets price, or central banks deliver, rate cuts. Less often it is because long-term yields rise, for example on inflation or government borrowing concerns. The first is called bull steepening and the second bear steepening.

Do other countries' yield curves invert?

Yes. During 2022 and 2023 curves in several major economies, including Germany and the UK, inverted as their central banks raised rates. The link between inversion and recession is best documented for the US, and the record elsewhere is less consistent.