Bull vs Bear Steepening — Reading the Curve After Un-Inversion

What this article does

The US yield curve un-inverted in late 2024 after the longest inversion on record. Most retail commentary has moved on. That's the mistake.

Every US recession since 1980 began after un-inversion, not during the inversion itself. The period we're in right now — the months and years after the curve returns to a normal slope — is historically the more dangerous one. Not the inversion. The exit from the inversion.

But "steepening" by itself isn't enough information. There are two completely different kinds, with opposite implications. This article explains both.

By the end you will:

• Know what bull steepening and bear steepening actually mean
• Understand why the type of steepening matters more than the move itself
• Be able to read the current 10Y-2Y spread and know which kind is happening
• See what followed the last four un-inversions and what they have in common

This is a deep-dive on a single signal. If you haven't read [The Yield Curve](/learn/yield-curve/) foundation article yet, start there — this builds on it.

The curve, in one sentence

The yield curve plots Treasury yields from short maturity to long. The yield curve plots Treasury yields across all maturities on a single chart, from 1-month bills to 30-year bonds. Its shape — upward-sloping, flat, or inverted — encodes the market's expectations about future growth, inflation, and Federal Reserve policy.^[1] Most of the time the curve slopes up — investors demand more yield to lend money for 10 years than for 2 years, compensation for time and uncertainty. A normal upward-sloping yield curve typically has the 10-year yielding 1-2 percentage points more than the 2-year. This 'term premium' compensates investors for the additional uncertainty and duration risk of holding bonds for a decade versus two years.^[2]

When the curve inverts, short rates exceed long rates. The bond market is betting the Fed will have to cut rates significantly, usually because growth is slowing or because rates have been hiked above what the economy can sustain. The yield curve's recession-predicting power comes from the fact that long-term yields embed market expectations of future short-term rates. When long yields fall below short yields, the market is essentially betting the Fed will cut rates significantly — usually because of an expected economic slowdown.^[3]

When the curve steepens, the spread between long and short rates is widening. The curve is moving back toward — or beyond — its normal shape.

That's the mechanical definition. The interesting question is: why is it steepening?

Two kinds of steepening

The curve can steepen in two ways, and they mean very different things.

Bull steepening

Bull steepening happens when short rates fall faster than long rates fall.

Why "bull"? Because falling rates are typically bullish for risk assets — they reduce the discount rate applied to future cash flows, support equity valuations, and ease financial conditions. When short rates collapse relative to long rates, it's usually because the Fed is cutting (or the market expects them to start cutting soon).

Bull steepening shows up at the end of a tightening cycle and the start of an easing cycle. The 2-year yield, which closely tracks Fed expectations, falls hard. The 10-year falls too, but more slowly, because long rates also reflect inflation expectations and term premium.

Bull steepening = the market pricing in rate cuts.

Bear steepening

Bear steepening happens when long rates rise faster than short rates rise.

Why "bear"? Because rising long rates are typically bearish for risk assets — they raise the discount rate, compress equity valuations, tighten financial conditions, and make duration assets less attractive.

Bear steepening shows up during periods of rising growth expectations, rising inflation expectations, or rising fiscal concerns. The 10-year and 30-year yields climb because investors demand more compensation for inflation risk or because foreign buyers retreat from Treasuries. The 2-year stays relatively anchored because the Fed isn't moving aggressively.

Bear steepening = the market pricing in inflation, growth, or fiscal stress at the long end.

Why the type matters more than the move

Imagine two scenarios where the 10Y-2Y spread moves from -0.5pp (inverted) to +1.0pp (positively sloped) over six months. Same headline move. Two completely different stories:

• Path A: 2-year falls from 5.0% to 3.5%. 10-year falls from 4.5% to 4.5%. The curve steepens because short rates collapsed. This is bull steepening. The Fed is cutting. Risk assets typically rally on the cut, then face the recession that the cuts are responding to.
• Path B: 2-year stays at 5.0%. 10-year rises from 4.5% to 6.0%. The curve steepens because long rates exploded higher. This is bear steepening. Inflation is sticky or foreign buyers are leaving. Risk assets typically struggle because the discount rate is moving against them.

Same shape. Opposite implications. The components matter.

What just happened: 2022 to now

The 2022–2024 yield curve inversion was the longest and deepest on record. The 2022-2024 yield curve inversion was the longest and deepest on record. The 2s10s spread first inverted in July 2022 and remained inverted for over 700 consecutive days, reaching a peak inversion of -108 basis points in July 2023.^[4] The 2s10s spread first inverted in July 2022, hit -108 basis points at its deepest point in July 2023, and stayed inverted for over 700 consecutive days.

That inversion has now ended. The curve un-inverted in late 2024 and has been positively sloped since. The current 10Y-2Y reading sits in the modest positive range, having normalised steadily through 2025 and into 2026.

The question for anyone watching: which kind of steepening is this?

Pull up FRED series [T10Y2Y](https://fred.stlouisfed.org/series/T10Y2Y), [DGS10](https://fred.stlouisfed.org/series/DGS10), and [DGS2](https://fred.stlouisfed.org/series/DGS2) and look at the components since the un-inversion in late 2024:

• The 2-year yield has come down significantly from its 2023 peak above 5%
• The 10-year has also come down but more modestly — and recently has crept back up
• The spread is positive but small, hovering between +0.3pp and +0.6pp through 2026

That pattern is mostly bull steepening with a bear steepening overlay — short rates have fallen further than long rates as the Fed signalled the end of its tightening cycle, but the long end has been stickier than a pure bull steepening would suggest. Term premium, foreign buyer retreat (the recent JGB break is part of this), and fiscal sustainability concerns are pulling the 10-year up even as the 2-year settles lower.

The historical pattern: what followed the last four un-inversions

This is the part most people skip. The yield curve inverts, gets all the headlines, then un-inverts quietly when nobody's looking. Every US recession since 1980 began after un-inversion, not during inversion. The yield curve uninverts (returns to positive slope) before recessions actually begin. The combination of inversion followed by rapid steepening is a stronger recession signal than inversion alone — it's the un-inversion that often coincides with the recession's start.^[5]

The pattern goes:

1. Curve inverts (gets media attention) 2. Curve stays inverted for many months 3. Curve un-inverts (quietly) 4. Recession begins, typically 0-12 months after un-inversion

The four most recent un-inversions and what followed:

The lag varies from 5 to 12 months. The signal is not "the recession starts the day the curve un-inverts" — it's "once the curve un-inverts, the recession is in the runway."

There has been one notable false positive in the modern era — the 1998 inversion that didn't lead to a recession. There has been one notable false positive in the modern era: the 1998 yield curve inversion that did not lead to a recession. It occurred during the LTCM/Asian financial crisis flight-to-safety period and reversed quickly, with no subsequent NBER recession until 2001.^[6] It was a flight-to-safety move during the LTCM/Asian financial crisis and reversed quickly without prolonged inversion.

This time the inversion lasted over 700 days. That's not a flight-to-safety. That's a structural call.

Why the un-inversion is the dangerous part

This confuses most people, so let's spell it out.

When the curve is inverted, the Fed is holding rates high. That means borrowing is expensive, credit is tightening, weak businesses are being squeezed. But strong businesses can still operate, employment stays robust, and the economy keeps grinding. The Fed sees this and keeps rates high.

When the curve un-inverts, it usually means the market has stopped expecting more hikes and started expecting cuts. The 2-year falls because the Fed is signalling pivot. But why is the Fed pivoting? Because something in the economy has started to crack. The cracks usually show in employment first, then in credit, then in equities. Every US recession since 1955 has been preceded by an inversion of the 2-year/10-year Treasury yield curve. The lead time from inversion to recession start has ranged from 6 months to 24 months, averaging around 14 months.^[7]

So the un-inversion isn't causing the recession — it's signalling that the conditions for one have arrived. By the time the curve is back to positive slope, the damage from the prior tightening cycle is already in the system, working its way through with the usual lag.

The Fed's first rate cut is usually too late to prevent the recession. It's an attempt to soften the landing.

What to watch

If you only check three things on the curve from here, make them these:

1. The components, not just the spread. Track DGS10 and DGS2 separately on FRED. If DGS2 is falling faster than DGS10, you're in bull steepening. If DGS10 is rising faster than DGS2 is moving, you're in bear steepening. 2. The pace of steepening. A slow, orderly un-inversion is one thing. A rapid steepening — 50+ basis points of widening in a few weeks — historically signals the recession is closer to imminent. Rapid bull steepening especially. 3. The rate of change in credit alongside the curve. The curve tells you about rates expectations; [credit spreads](/learn/credit-spreads/) tell you about default risk. When both are signalling stress, the signal is much stronger than either alone. Right now credit is still calm (high-yield OAS sits in the 14th percentile historically). The curve is steepening but credit isn't confirming. That's the late-cycle pattern, not the recession-imminent pattern.

The curve's quiet message

The yield curve doesn't shout. It moved quietly through the longest inversion on record, un-inverted while macro Twitter argued about other things, and is now slowly steepening. None of this is dramatic. All of it is data.

What it's saying right now: the conditions that produced every recession since 1980 are in place. The timing isn't certain. The signal is.

That's not a prediction. It's a regime description. The right response isn't to position for a crash — it's to know which signals would confirm one. The components of the curve. The pace of steepening. The state of credit. These together tell the story. Any one of them alone is incomplete.

Watch them. Don't trade them. Understand what they're saying.

The curve's job is to map expectations. Yours is to read the map.

The 10Y-2Y spread, 10-year yield, and 2-year yield are tracked daily on the [Lighthouse dashboard](/dashboard) with live values from FRED. The current reading and historical context are also available on the [/data](/data) page.

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