Most Reliable Recession Indicators: Yield Curve, Sahm Rule & LEI

Definition

Recession indicators are a set of quantitative economic signals designed to identify the onset of recessions in real time, filling the gap left by NBER's official declarations which typically come 6-12 months after a recession begins. The three most established US recession indicators are the yield curve inversion (10Y-3M Treasury spread), the Sahm Rule (unemployment rate trigger), and the Conference Board LEI (composite of 10 leading indicators). Each uses a different data domain — bond markets, labor markets, and a broad composite — providing independent signal confirmation when combined. [src1, src3]

Key Properties

• Yield curve inversion: 10Y-3M spread turning negative preceded every US recession since 1955; inversions >3 months show 87.5% accuracy (7/8 since 1968), lead times 6-24 months; NY Fed publishes formal probability model [src3]
• Sahm Rule: Triggers at 0.50pp rise in 3-month avg unemployment above 12-month low; identified all 11 recessions since 1950 with two false positives; typically fires ~3 months into recession [src1, src4]
• Conference Board LEI: YoY decline >4% preceded every US recession since 1960; 10-component composite forecasts 6-9 months ahead; declined 0.2% in Dec 2025 (5th consecutive decline) [src2]
• Supplementary signals: BBB-Treasury spread >200bps, ISM Manufacturing PMI <45 for two consecutive months, declining real retail sales, rising continuing claims [src2]
• Current readings (late 2025): Sahm Rule at 0.35pp (below trigger), yield curve normalized after 2022-2023 inversion, LEI in gradual decline [src1]

Constraints

• US-calibrated indicators — weaker predictive power for other economies with different labor markets or financial systems [src4]
• No single indicator is sufficient — combine all three with credit spreads, employment breadth, and retail sales [src2]
• 2022-2024 false signals: yield curve inverted 16 months without recession; LEI declined 15 of 18 months; Sahm Rule approached at 0.53pp (Aug 2024) [src1]
• NBER declares recessions 6-12 months after onset — these real-time indicators are faster but more error-prone [src3]
• Sahm Rule designed for automatic fiscal stabilizers, not standalone forecasting — immigration-driven labor force growth can trigger false signals [src4]

Framework Selection Decision Tree

START — User assessing recession risk
├── What level of analysis?
│   ├── Quick recession probability check
│   │   └── Recession Indicators ← YOU ARE HERE
│   ├── Deep yield curve interpretation
│   │   └── Yield Curve Analysis
│   ├── Broad economic health monitoring
│   │   └── Economic Indicators
│   └── Rate impact on business/investment
│       └── Interest Rate Impact
├── Which indicators to prioritize?
│   ├── Real-time labor → Sahm Rule (FRED: SAHMREALTIME)
│   ├── Bond market forward → Yield curve (3m10y or 2s10s)
│   ├── Composite forward → Conference Board LEI
│   └── Credit stress → BBB-Treasury spread, HY OAS
└── How many indicators flashing?
    ├── 0-1 → Low risk — continue monitoring
    ├── 2 → Elevated — stress-test plans
    └── 3+ → High risk — activate contingency

Application Checklist

Step 1: Check Real-Time Indicator Levels

• Inputs needed: Current Sahm Rule (FRED: SAHMREALTIME), 3m10y and 2s10s spreads, LEI YoY change
• Output: Dashboard of indicator levels vs. recession thresholds
• Constraint: Use 3-month moving averages — single-month readings are too noisy [src1]

Step 2: Assess Indicator Agreement

• Inputs needed: Results from Step 1 — which indicators are at/beyond thresholds
• Output: Agreement score (0-3 core indicators + supplementary signals)
• Constraint: Single-indicator triggers have high false positive rates post-2020; require at least two confirming [src2]

Step 3: Check for Structural Distortions

• Inputs needed: Monetary policy regime (QE/QT), labor force changes (immigration), fiscal policy
• Output: Assessment of whether readings may be structurally distorted
• Constraint: In QE/QT transitions, weight Sahm Rule and real economy indicators over yield curve [src3]

Step 4: Determine Action Level

• Inputs needed: Agreement score + distortion assessment
• Output: Risk classification (low/moderate/elevated/high) with recommended actions
• Constraint: "High" requires 2+ core indicators with no structural distortion explanation [src2]

Anti-Patterns

Wrong: Treating yield curve inversion as an immediate recession signal

Investors who sold at the July 2022 inversion would have missed a 40%+ S&P 500 rally. Inversions signal elevated risk within 7-24 months, not imminent downturn. [src3]

Correct: Use inversion as a risk management trigger with a time horizon

Stress-test plans, gradually reduce risk, and monitor confirming indicators. The actionable signal may be the un-inversion, not the inversion itself. [src3]

Wrong: Dismissing indicators after a single false signal

The 2022-2023 inversion not producing an immediate recession led many to declare the indicator broken. The historical record of 87.5% across 8 cycles is more informative than one potential miss. [src2]

Correct: Evaluate reliability across the full historical record

Adjust confidence intervals rather than discarding signals. Consider whether structural factors (QE, immigration) explain the divergence. [src3]

Wrong: Using the Sahm Rule as a standalone recession forecast

The Sahm Rule was designed for automatic fiscal stabilizers, not forecasting. It typically fires 3 months into a recession — it confirms, it does not predict. [src4]

Correct: Combine the Sahm Rule with leading indicators for early warning

Pair with yield curve and LEI (forward-looking) to get both early warning and real-time validation. The Sahm Rule's value is speed of confirmation. [src1]

Common Misconceptions

Misconception: Yield curve inversion always means recession within 6 months.
Reality: Lead times range from 7 to 24 months. The 2005-2007 inversion preceded the Great Recession by nearly 2 years. The 2022-2023 inversion has not produced a recession as of late 2025. [src3]

Misconception: The Sahm Rule triggered a false positive in August 2024.
Reality: The 0.53pp reading was elevated by immigration-driven labor force growth, not underlying economic weakness. Claudia Sahm herself noted this structural distortion. [src4]

Misconception: If the LEI is declining, a recession is inevitable.
Reality: The LEI declined 15 of 18 months through early 2024 without recession. Financial components can dominate during monetary policy transitions, producing false signals. [src2]

Misconception: NBER's recession declaration is timely enough for decision-making.
Reality: NBER declares 6-12 months after onset. The 2020 recession was declared in June 2020, four months after it started. Real-time indicators are essential precisely because the official arbiter is backward-looking. [src1]

Comparison with Similar Concepts

When This Matters

Fetch this when a user asks about recession probability, whether a recession is coming, how to interpret the Sahm Rule or LEI readings, or when building a recession risk monitoring framework.