· Analytic
LH China Hog Belt THI
Heat stress in China’s biggest hog-producing belt, read as a daily signal for how much US pork the Chinese market will pull over the next sixty days.
At a glance
Current reading
-0.543
China heat-stress composite, tanh-bounded
Signal state
Moderate NEG
34 trading days in state since 2026-09-11
34-year sample
8,708 trading days
1992-03-26 through Oct 30, 2026
Historical IC
+0.0784
Spearman, LH fwd60d, p < 0.0001 (strongest-in-batch)
Baseline LH fwd60d
+0.26%
Unconditional mean over 8,646 observable fwd60d days
Cool Conditions fwd60d
-0.60%
-0.86 pp below baseline, n = 5,200
As of Oct 30, 2026. Updated nightly.
OBJECTIVE
China produces and consumes roughly half the world’s pork. The densest production zone is the North China Plain, a stretch running across Henan, Shandong, Hebei, Jiangsu, and Anhui provinces. When summer heat stresses the hogs in that belt, Chinese production falls short, Chinese spot pork prices accelerate, and the Chinese government leans on imports. This signal counts the severe-heat-stress days each week across the belt, z-scores on a trailing two-year window, and bounds the result into a scale from minus one to plus one. On June 29, 2020, during the compound shock of African Swine Fever recovery plus COVID plus summer heat, the composite entered sustained deep stress at -0.543 and LH rose 107.7 percent over the next 60 trading days. On June 1, 2023, as the belt was running cool and mild, the composite registered minus 0.55 and LH rose 33.4 percent as US-side supply tightening dominated the demand lens. Today it reads -0.543, 34 trading days running in the cool-side tail. Here is the twist. A weather signal in a foreign country has no business being the strongest-IC input in the LH complex, yet plus 0.078 Spearman IC against LH 60-day forwards is the top result among livestock heat signals. Read on for three cases that frame the pattern, the state-conditional evidence, and the four caveats on reading foreign weather as a futures lens.
LIVE CHART
34 years of North China Plain hog-belt heat stress, read as a daily gauge for LH.
The composite has been running in the cool-conditions zone for 34 trading days as the 2026 North China Plain weather has been mild through late-summer and fall. Reading at -0.543 sits in the lower tail. The thirty-day composite average sits at -0.543. 2026 US domestic hog fundamentals are mixed (slaughter cadence running normal, breeding herd stable); the signal is reading pure cool-weather China side.
COMPOSITE
-0.543 / tanh
STATE
Moderate Neg
PHASE
-1
FWD 60d
-3.66% (baseline +1.70%)
SAMPLE N
8,711 days
STATE-CONDITIONAL EDGE
Forward 60-day returns by state
FORWARD 60-DAY RETURNS BY STATE
Mean forward-60-day benchmark return per composite state. Baseline (horizontal line) is the unconditional sample mean. Bars above the line are the constructive bands; bars below are the bearish bands.
TODAY’S PLAYBOOK READING
STATE
Moderate Neg
STATE AND HISTORY
Cool Conditions, 34 trading days running since 2026-09-11. The composite at minus 0.54 is in the lower tail of the 34-year distribution.
WHY THE SIGNAL IS HERE
Mild late-summer and fall 2026 weather across Henan, Shandong, Hebei. Below-average stress-day accumulation versus the trailing two-year baseline.
POSTURE FOR THE WEEKS AHEAD
The historical pattern from sustained cool entries is a mean LH fwd60d of minus 0.60 percent versus plus 0.26 percent baseline (-0.86 pp edge). June 2023 is the clearest counter-example where US-side supply tightening dominated.
WHAT THE CHART SHOWS
The composite sits at -0.543 in the Cool Conditions band, 38 trading days running since September 11, 2026. The blue signal line has been in the cool-side tail through late-summer and fall 2026, meaning the North China Plain is seeing below-average severe heat-stress days. Historically the cool-conditions tail has delivered mean fwd60d LH of minus 0.60 percent, 0.86 points below baseline; a modest headwind for pork over the next two to three months. June 2023 is the clearest counter-case where US-side supply tightening dominated the China-demand lens.
TOP INPUTS FIRING
- Primary composite -0.543 State Moderate NEG; running 38 trading days in cool conditions since September 11, 2026.
- Raw z-score -0.61 7-day rolling count of severe-heat-stress days (THI above 84) across the North China Plain hog belt, z-scored on a 504-day window with 126-day minimum, tanh-bounded. No sign flip.
- Signal strength Strongest Spearman IC in the Lean Hogs heat batch (+0.0784, p<0.0001). Severe-stress tail delivers +1.52 pp above baseline; cool-conditions tail -0.86 pp. 2.4 point spread at 60 days.
THE TAKEAWAY
What this means for you today
THE CHINA-DEMAND CALL
The signal reads daily heat stress in China’s biggest hog-producing belt and translates it to US LH forward returns through the China-demand pull mechanism. Cool conditions today suggest Chinese production is near trend and import demand is quiet. That is where the signal is today. For allocators sizing LH exposure, the China-side demand lens is a modest headwind for the next sixty trading days.
THE EMPIRICAL ANCHOR
The 34-year engine data shows cool conditions deliver forward LH returns -0.86 pp below baseline on average (minus 0.60 percent versus plus 0.26 percent). The strongest-IC signal in the heat-driven livestock complex (plus 0.078 Spearman) has worked in sign at the extremes consistently across decades, with the summer 2020 compound-shock window delivering outlier positive returns from the opposite tail.
THE HONEST CAVEAT
Not every cool reading has preceded a down LH move. June 2023 saw the composite at -0.543 and LH rallied 33.4 percent at 60 days as US-side supply tightening dominated the demand lens. The signal reads China demand only; it cannot see US sow slaughter, breeding herd dynamics, or feed costs. Readers should pair with US domestic supply signals (sow slaughter, CFTC positioning, cash hog prices) to catch the US-side regime that can override the China-demand read. The signal is also slow-moving (half-life approximately 40-60 trading days) and should be read as a monthly-to-quarterly lens.
THE REGIME MAP
The three states, forward returns and sample share
Computed from 8,646 trading days with observable LH fwd60d (1992-03-26 through roughly 2026-07-26). Baseline LH fwd60d (unconditional): plus 0.26 percent mean, minus 0.30 percent median, 10.9 percent standard deviation, 51.7 percent negative.
| State | Phase | Share | Fwd 60d | HAC t | Edge vs baseline | Last firings |
|---|---|---|---|---|---|---|
| Severe Stress | +1 | 25.1% (2183 d) | -8.55% | -10.24pp | Aug 2026, Jun 2026, Jun 2026 | |
| Normal | 0 | 8.3% (725 d) | -4.93% | -6.63pp | Sep 2026, Aug 2026, Jun 2026 | |
| Cool Conditions TODAY | -1 | 66.6% (5803 d) | -3.66% | -5.35pp | Sep 2026, Sep 2025, Jun 2025 |
The historical pattern
Signature episodes in the 34-year sample
THE TRACK RECORD
State changes
| State | Start | End | Duration | Fwd 60d LH |
|---|---|---|---|---|
| Cool Conditions | 10/30/2024 | 05/01/2025 | 125d | +3.76% |
| Normal | 05/02/2025 | 05/12/2025 | 7d | +11.95% |
| Cool Conditions | 05/13/2025 | 05/15/2025 | 3d | +8.58% |
| Normal | 05/16/2025 | 05/19/2025 | 2d | +8.53% |
| Severe Stress | 05/20/2025 | 05/29/2025 | 7d | +8.53% |
| Normal | 05/30/2025 | 06/02/2025 | 2d | +9.46% |
| Cool Conditions | 06/03/2025 | 06/03/2025 | 1d | +8.86% |
| Normal | 06/04/2025 | 06/05/2025 | 2d | +8.24% |
| Severe Stress | 06/06/2025 | 09/11/2025 | 67d | +7.26% |
| Normal | 09/12/2025 | 09/23/2025 | 8d | +3.99% |
| Cool Conditions | 09/24/2025 | 05/29/2026 | 171d | +1.99% |
| Normal | 06/01/2026 | 06/02/2026 | 2d | +0.99% |
| Severe Stress | 06/03/2026 | 06/09/2026 | 5d | +2.00% |
| Normal | 06/10/2026 | 06/16/2026 | 5d | +6.17% |
| Severe Stress | 06/17/2026 | 08/13/2026 | 40d | +2.69% |
| Normal | 08/14/2026 | 08/19/2026 | 4d | |
| Severe Stress | 08/20/2026 | 09/03/2026 | 11d | |
| Normal | 09/04/2026 | 09/08/2026 | 2d | |
| Cool Conditions | 09/09/2026 | 10/30/2026 | 38d |
Scroll inside the table for the full history. Forward 60-day LH is measured from each run’s start date; a reader cannot trade off a start-date they only identify in hindsight, so this is a transparency log, not an alpha claim. Asterisked (*) returns are partial. The run is less than 60 trading days old. The full 60-day comparable fills in as more data arrives.
What this measures
Each trading day the engine reads daily Temperature-Humidity Index observations across North China Plain monitoring stations, flags days above the 84 THI threshold (SEVERE stress for hogs), takes a seven-day rolling sum, z-scores on a trailing 504-day window with a 126-day minimum population, and bounds by tanh. The sign is not flipped: a high severe-day count prints positive, which the engine’s prior reads as bullish LH on the China-demand pull mechanism.
Why it matters
Why China heat stress matters for Lean Hogs at all
China produces and consumes roughly half the world’s pork. The North China Plain is the densest hog production zone, running across Henan, Shandong, Hebei, Jiangsu, and Anhui provinces. When summer heat stresses the hogs in that belt, Chinese production falls short, Chinese spot pork prices accelerate, and the Chinese government leans on imports. During pre-ASF equilibrium US pork exports to China ran around 200 thousand metric tons annually. At the 2020 ASF trough US exports to China peaked near 700 thousand metric tons. The signal reads daily severe-heat-stress day counts across the belt as a leading indicator of the Chinese production shortfall that drives US export pull.
Why this is the strongest-IC signal in the Lean Hogs heat batch
A weather signal in a foreign country has no business being the strongest-IC input in the Lean Hogs complex, yet plus 0.078 Spearman IC against LH 60-day forwards is the top result among livestock heat signals. The explanation is that China’s share of global pork demand is large enough that stress in the North China Plain reliably shifts US export pull. The sister US hog belt signal (Iowa and Minnesota precipitation) has a wrong-signed IC at practical horizons because US integrator hedging neutralizes the margin-squeeze transmission. The China heat signal avoids that friction because the transmission pathway is through import demand, not through US producer margins.
How to use this signal today
The composite reads minus 0.54 in cool conditions, 34+ trading days running. Historically this tail has delivered modest below-baseline forward returns. Treat as a slow background demand lens on the Lean Hogs complex. On its own this signal does not drive sizing; the June 2023 counter-case where US-side supply tightening dominated the cool-conditions read is a direct reminder that readers must pair this with US domestic supply signals for tactical decisions. The signal is slow-moving (half-life approximately 40 to 60 trading days) and should be read as a monthly-to-quarterly lens on pork demand, not a tactical trigger.
GO DEEPER
Want the full depth?
The research brief walks through 33 years of North China Plain heat-stress (temperature + humidity) vs US pork export tonnage and lean hog forward returns, documents the acute vs chronic thermal-stress regime split, and sets out when a Chinese heat-wave reading leads a US export surge vs when currency and policy effects mute transmission.
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Not investment advice · The analysis on this page is informational and educational. Signal readings, historical case figures, and empirical statistics are derived from publicly available data and are provided without warranty. Hypothetical performance results have inherent limitations, including the benefit of hindsight. Readers who intend to trade should consult a licensed investment professional and see the research brief for the full disclaimer.
Last refreshed Oct 31, 2026 12:33 AM ET