The Yield Curve Spread

Three States of the Yield Curve

Normal

Long rates above short rates. Upward slope. Growth expected.

Inverted

Short rates above long rates. Downward slope. The market prices rate cuts ahead.

Flat

Rates nearly equal across maturities. Transition state. Direction matters more than level.

01 What the Spread Measures

The yield curve spread is the 10-Year Treasury yield minus the 2-Year Treasury yield. That's it. One subtraction. But those two numbers encode an enormous amount of information about what the bond market expects to happen next.

The 2-Year yield tracks where traders think the Fed will set short-term rates over the next two years. It moves fast and reflects near-term policy expectations. When the Fed is hiking or expected to hike, the 2-Year rises.

The 10-Year yield reflects longer-term growth and inflation expectations. It's stickier. It doesn't react to a single jobs report the way the 2-Year does. When investors believe the economy will grow steadily over the next decade, they demand higher 10-Year yields to compensate for inflation risk.

When the 2-Year rises above the 10-Year, the bond market is saying: short-term rates are too high and the Fed will be forced to cut them. That's an inversion. The market is pricing in economic weakness ahead.

02 The Recession Record

The 10Y-2Y spread inverted before every US recession in the modern era: 1973, 1978, 1980, 1989, 2000, 2006, and 2019 (source: NBER Business Cycle Dating). The lag between inversion and recession onset has ranged from 5 to 22 months.

There is one well-known exception. The curve briefly inverted in late 1998 during the LTCM crisis and Russian debt default, and no recession followed; the dot-com bubble burst two years later.

2022-2023 Inversion

The most recent inversion was the deepest and longest since the early 1980s. The spread hit roughly -108 basis points in July 2023, meaning the 2-Year yield exceeded the 10-Year by over a full percentage point. The curve stayed inverted for more than two years before normalizing in late 2024.

Depth and duration of inversion are not reliable predictors of recession severity. The 1981 inversion was deep and the recession was sharp but short. The 2006-2007 inversion was shallow and the recession was catastrophic.

03 Re-Steepening

Re-steepening happens when the Fed starts cutting short-term rates because the economy is deteriorating. The 2-Year yield drops faster than the 10-Year. The spread goes from negative back to positive.

The S&P 500's largest drawdowns have clustered during or immediately after re-steepening phases, not during inversions. In 2001, the curve un-inverted as the Fed cut rates in January. The equity market didn't bottom until October 2002, nearly two years later. In 2007, the curve normalized through mid-year. The S&P peaked in October and then fell 57% over the next 17 months.

In those episodes the Fed cut rates after growth had already slowed, so for a stretch both rates and growth were falling.

In short: in past cycles the curve inverted months before recessions began, and re-steepened around their start.

The Re-Steepening Sequence

Phase 1: Inverted

Fed hiking. 2Y above 10Y. Bond market pricing in future weakness.

Phase 2: Flattening

Fed pauses. Spread narrows toward zero. Uncertainty peaks.

Phase 3: Re-Steepening

Fed cutting. 2Y drops fast. Spread goes positive. In past cycles, recession was usually underway by this phase.

04 Cross-Asset Read-Through

Bank Margins

Banks borrow short and lend long. Their net interest margin is roughly the yield curve spread. When the curve inverts, bank profitability gets squeezed. When it stays inverted for two years, as in 2022-2024, credit conditions tighten as banks pull back on lending. Regional banks with concentrated loan books feel this first. SVB's collapse in March 2023 happened during the deepest inversion in four decades.

Equity Volatility

In past cycles the VIX spiked during re-steepening rather than during inversion, and inverted curves persisted for months or years while equities rose. Credit spreads widened, earnings estimates were cut, and equity risk premiums repriced as the curve returned to normal.

Bitcoin and Digital Assets

Bitcoin's relationship with the yield curve is indirect. Rate cuts that drive re-steepening have tended to weaken the dollar and increase net liquidity, while the start of a recession has brought selling across assets, including crypto.

In 2020 the sequence ran: a broad sell-off in March, then rate cuts and balance sheet expansion, and a new Bitcoin all-time high by December.

05 What the API Returns

PreReason tracks the yield curve spread as a standalone metric and includes it in the Macro Snapshot briefing alongside other rate and liquidity indicators. The API returns trend direction, signal classification, and percentile ranking so agents can consume the state without parsing raw yield data.

PreReason API - yield curve metric

get_metric yield-curve (MCP), as served on October 12, 2026
# Yield Curve Spread
**Signal:** at-trend (Medium, 64/100)
**Trend:** flat | 7d: -0.01 pp | 30d: 0.04 pp
**Momentum:** steady - Stable with minimal directional movement
**Percentile:** 36th all-time (below average)
Yield curve spread (10Y-2Y) at 0.44% (PreReason's calculation: Treasury's 10 year par yield less its 2 year par yield); 7d -0.01 pp (flat, within ±0.05 pp), 30d +0.04 pp, 90d +0.09 pp. Consolidating: the spread held within its band over 7 days.
*Source: PreReason's calculation from the U.S. Department of the Treasury's Daily Treasury Par Yield Curve Rates; before 1990, the Federal Reserve Board's H.15 Treasury constant maturities as FRED's T10Y2Y computes them | Updated: 2026-10-09T00:00:00+00:00 | 3 days ago*
**Notice:** Source: U.S. Department of the Treasury, Daily Treasury Par Yield Curve Rates.

Source data comes from the US Treasury's own Daily Treasury Par Yield Curve Rates, the 10 year yield minus the 2 year on the same day, read each business day evening. The metric is also available standalone via GET /api/metrics/yield-curve.

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