· Analytic
Z3753 USDA WASDE Report-Level Revision Velocity
The standard deviation of cell values within each monthly WASDE report, 504-day rolling z-scored. Measures the "churn" or "noise level" of each WASDE publication across all its reporting cells , a report-level revision-velocity signal that captures when USDA is revising estimates aggressively versus publishing stable updates.
Current reading
+0.712
Extreme Pos
DAILY · SIGNAL
As of Oct 30, 2026. Updated nightly.
Current composite
+0.7182
On the plus-or-minus one scale; WASDE churn significantly elevated
Signal state
Extreme POS
209 consecutive days in episode , longest sustained reading in signal history
All-time percentile
98.0th
Top 2 percent of 36 years
extreme-pos corn fwd 60d
+1.85%
143 days (1.6%), HAC t +1.03 (not sig)
extreme-neg corn fwd 60d
-0.76%
41 days (0.5%), HAC t -1.03
LOCKED portfolio weight
7.7%
1/13 equal-weight in Layer 1 base sleeve, polarity +1
Days since last event
203
Last event: Jan 02, 2026
Nearest threshold
-0.52
To cross into Extreme NEG
Typical run length
204 days
Based on 1 historical Extreme POS runs; 25-75 pct range: 204-204 days
OBJECTIVE
The USDA World Agricultural Supply and Demand Estimates report publishes hundreds of cell values each month covering US + global supply-demand balances for corn, soybeans, wheat, rice, cotton, oilseeds, dairy, cotton, sugar, red meat, and poultry. The internal cell-dispersion within a single release , the standard deviation across all its reporting cells , can be interpreted as a report-level "revision noise" metric. When USDA is publishing stable updates (every month looks similar), cell-dispersion is low. When USDA is publishing high-churn updates (new crop estimates, policy-shift revisions, methodology changes), cell-dispersion rises. This signal queries `usda-wasde-cells` for all cell values, groups by `release_iso` publication date (model-grade publication-aware anchor), computes the standard deviation per release, filters to releases with 200+ cells (data-quality gate), forward-fills daily, z-scores on a 504-day rolling window with 126-day minimum, and tanh-bounds. The engine uses the ACTUAL WASDE publication date (`release_iso`) as the anchor , no look-ahead, model-grade design that the pre-patch US Corn Ending Stocks YoY INV (Publication-Lag Aware) should have followed. The empirical pattern across 36 years is weak but directional. 98 percent of history is in NORMAL territory (near-zero signal); only approximately 2 percent of history is in extreme states. extreme-pos state (val above plus 0.5, elevated WASDE churn) delivers mean corn fwd 60d of plus 1.85 percent (HAC Newey-West t plus 1.03, 143 state-days). extreme-neg state (val below minus 0.5, low churn) delivers minus 0.76 percent (HAC t minus 1.03, 41 state-days). Neither tail individually clears 5 percent significance. The signal reads +0.712 as of October 23 2026 in extreme-pos territory for 209 consecutive trading days at the 98.0 percentile , the longest sustained extreme-pos reading in the signal’s history. The signal contributes 7.7 percent weight to the LOCKED corn portfolio v1_1 Layer 1 base sleeve with polarity sign plus one.
LIVE CHART
Thirty-six years of USDA WASDE report-level cell-value dispersion z-score.
COMPOSITE
0.7 / 100
STATE
Extreme Pos
PHASE
+1
FWD 60d
-4.81% (baseline +2.31%)
SAMPLE N
9,039 days
TODAY’S PLAYBOOK READING
STATE
Extreme Pos
WHAT THE CHART SHOWS
The composite sits at +0.71 in the WASDE Churn High band. The October 2026 WASDE reconciled the 2025 US corn marketing year with meaningful cell-level revisions across production, ending stocks, and exports estimates. The signal fires at these release-day events. CBOT front-month corn (orange, right axis) sits near $4.48/bu.
TOP INPUTS FIRING
- Primary composite +0.71 State WASDE Churn High. The October 2026 WASDE carried elevated cell-level revisions reconciling the 2025 marketing year.
- USDA WASDE report-level cell-value standard deviation, 504-day rolling z Monthly USDA WASDE report. Each release’s across-cell standard deviation is computed, then 504-day rolling z-scored.
- IC vs CBOT corn fwd 60d: Spearman +0.145, p=0.047 (N=189 firings) Marginally significant IC on sparse firing-day sample (N=189 covering ~16 years of monthly WASDE releases). Interpret as directional nudge, not high-conviction trade.
THE TAKEAWAY
What this means for you today
THE WASDE CHURN MECHANISM
Monthly WASDE reports publish hundreds of cells across global agricultural supply-demand estimates. The internal cell-value dispersion captures how much variance exists ACROSS the reporting cells on a single publication date. High-dispersion months typically coincide with: new-crop projection introduction (May WASDE), methodology-change benchmark revisions, major policy-shift adjustments, and supply-shock crisis response windows. Low-dispersion months are routine updates with incremental revisions.
THE MODEL-GRADE PUBLICATION-AWARE DESIGN
The engine uses `release_iso` (the actual WASDE publication date) as the anchor for each cell-value standard deviation. There is no look-ahead because each publication’s dispersion is only measured on or after its publication date. The 504-day rolling z-score uses only trailing data. Model-grade publication-aware design , the pre-patch US Corn Ending Stocks YoY INV (Publication-Lag Aware) should have followed this template (see persona code review 2026-10-25 §2.1).
THE HONEST CAVEAT
The signal is a MACRO USDA METADATA indicator, not a corn-specific supply-demand signal. The cell-dispersion captures ALL WASDE cells (corn + soy + wheat + rice + cotton + oilseeds + meat + dairy), so the signal is not uniquely corn-focused. The current 204-day extreme-pos persistence reflects an unusual sustained-high-churn window that may be an artifact of USDA’s current benchmark revision cycle or methodology change , the signal cannot distinguish between these drivers. Neither tail clears 5 percent individual significance despite the 36-year sample.
THE REGIME MAP
The three WASDE report-churn regime states, forward returns and sample share
Behavior across the WASDE report-level revision velocity signal (standard deviation of cell values within each monthly WASDE report, 504-day rolling z-scored). Measures the churn or noise level of each publication. SPARSE: fires only on WASDE release days (approximately 12 per year, N=249 live firings). CBOT corn benchmark.
| State | Phase | Share | Fwd 60d | HAC t | Edge vs baseline | Last firings |
|---|---|---|---|---|---|---|
| WASDE Churn Low | – | 0.5% (41 d) | -3.99% | -4.28pp | Nov 2025 | |
| WASDE Churn Neutral | 0 | 97.2% (8794 d) | +0.54% | +0.24pp | Nov 1990 | |
| WASDE Churn High TODAY | + | 2.3% (209 d) | +2.06% | +1.77pp | Jan 2026 |
The historical pattern
Methodology
THE TRACK RECORD
State changes
| State | Start | End | Duration | Fwd 60d SPY |
|---|---|---|---|---|
| Normal | 10/23/2024 | 10/31/2025 | 258d | +4.92% |
| Extreme Pos | 11/03/2025 | 12/31/2025 | 41d | +1.26% |
| Extreme Neg | 01/02/2026 | 10/23/2026 | 204d | -4.81% |
Scroll inside the table for the full history. Forward 60-day SPY 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
The engine queries `fundamentals_data.usda-wasde-cells` for all cell values. Groups by `release_iso` publication date, computes per-release statistics (standard deviation + count). Filters releases to those with 200+ cells (data-quality gate , early-sample releases may have fewer cells due to historical fill incompleteness). Takes the standard deviation as the churn metric. Forward-fills daily. Z-scores on 504-day rolling window with 126-day minimum. Tanh-bounds. Five-state machine on the final the primary composite.
GO DEEPER
Want the full depth?
The full research brief adds methodology detail on the WASDE report-level churn construction, how the 504-day rolling z-score captures the publication-regime baseline, and the sparse-firing caveat (one firing per month). Includes historical case studies anchored to actual high-churn releases, the three-regime state-conditional table, and the methodology for pairing with Ending Stocks, Carryout Drift, Dec-Nearby Carry, and the Corn Cycle DNA playbook.
Taxonomy, polarity, state labels
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 Nov 02, 2026 02:31 PM ET