WHEAT SPECIALIST · Grain / Geopolitical Risk
Z4538 – [W] GPR Ukraine Geopolitical Risk
Ukraine is a top-5 world wheat exporter; elevated geopolitical risk around Ukraine events shows up directly in wheat futures.
At a glance
Current reading
-0.729
On the plus-or-minus one scale; z-scored Ukraine GPR.
Signal state
Moderate NEG
Current state across the Quiet Ukraine / Normal / Elevated Ukraine GPR regime.
Phase duration
150 sessions
Consecutive trading days in the current phase.
Sample
36 years
Monthly Caldara-Iacoviello GPR Ukraine component, 1990 onward.
As of Nov 03, 2026. Updated nightly.
SIGNAL OVERVIEW
Ukraine is a top-5 world wheat exporter, and Russia-Ukraine conflict episodes (2014 Crimea, 2022 invasion) have driven dramatic wheat price moves through export disruption. The Caldara-Iacoviello Geopolitical Risk Index (GPR) is a text-mined measure of risk perception based on US + UK + Canadian newspaper coverage; the Ukraine country component captures risk perception specifically about Ukraine events.
The empirical pattern is counter-intuitive: elevated Ukraine GPR precedes NEGATIVE 60-day wheat forward returns. Shock episodes drive an initial price spike, then the market mean-reverts over 60 days as positioning unwinds and supply fundamentals reassert. Quiet Ukraine (low GPR) precedes modest-positive wheat forward returns as risk premium drains out of the forward curve.
LIVE CHART
Thirty-six years of the Caldara-Iacoviello Ukraine Geopolitical Risk Index against CBOT SRW wheat forward returns.
What the chart is showing. The dark line in the top panel is the Caldara-Iacoviello Ukraine GPR composite on a tanh-bounded plus-or-minus one scale — positive means elevated Ukraine geopolitical risk, negative means quiet Ukraine. The bronze line in the middle panel is the CBOT SRW wheat front-month in cents per bushel. The bottom panel tracks the 252-day rolling information coefficient between the composite and wheat 60-day forward returns. Dashed horizontal lines mark the plus-or-minus 0.2 moderate and plus-or-minus 0.5 extreme thresholds.
COMPOSITE
-0.729 / tanh
STATE
Moderate NEG
PHASE
-0.93
SAMPLE N
9,000+ days
TODAY’S PLAYBOOK READING
STATE
Moderate Neg
STATE AND HISTORY
Composite -0.729, state Moderate NEG, 150 trading days running in the current phase. Per-state baselines in the regime table below.
THE UKRAINE-WHEAT MECHANISM
Ukraine is a top-5 world wheat exporter. Russia-Ukraine conflict episodes (2014 Crimea annexation, 2022 invasion) directly disrupt global wheat supply via Black Sea port risk and export-corridor uncertainty. The Caldara-Iacoviello Ukraine GPR is a text-mined newspaper measure of risk perception that leads the forward curve.
HOW TO POSITION
Elevated Ukraine GPR drives an initial shock spike in wheat futures followed by 60-day mean-reversion. Quiet Ukraine periods empirically precede modest-positive wheat forward returns. Pair with the Russia Wheat Production YoY, EU27 Wheat Production YoY, and Novorossiysk Cargo Pace signals for a full Black Sea supply picture.
WHAT THE CHART SHOWS
The composite sits at -0.729. Signal state is Moderate NEG, 150 trading days running. See the regime table below for per-state baselines.
TOP INPUTS FIRING
- Primary composite -0.729 State Moderate NEG, 150 trading days running in the current phase.
- Caldara-Iacoviello Ukraine GPR Text-mined newspaper coverage of Ukraine-related geopolitical tensions, z-scored over 1260 days.
THE TAKEAWAY
What this means for you today
THE GEOPOLITICAL CALL
Composite -0.729, state Moderate NEG, 150 trading days running. Current direction and per-state baselines are in the regime table below.
THE EMPIRICAL CONTEXT
Per-state forward returns show the counter-intuitive pattern — elevated Ukraine GPR extremes precede negative 60-day wheat returns (initial shock spike reverts); quiet Ukraine precedes modest-positive wheat returns as risk premium drains.
THE HONEST CAVEAT
GPR is a monthly text-mined series with newspaper-cycle lag; a single invasion-escalation event can push the composite abruptly. Use as a regime overlay on the Black Sea supply stack, not a day-trade.
THE REGIME MAP
The three Ukraine-GPR regime states, forward returns and sample share
Computed from the live window. CBOT SRW Wheat front-month baseline forward returns are near baseline across the Caldara-Iacoviello Ukraine GPR text-mined series since 1990.
| State | Phase | Share | Fwd 60d | HAC t | Edge vs baseline | Last firings |
|---|---|---|---|---|---|---|
| Quiet Ukraine TODAY | -1 | 48.4% (4375 d) | +0.21% | +0.82pp | Apr 2026, Jul 2025, Apr 2025 | |
| Normal | 0 | 27.6% (2501 d) | -1.29% | -0.69pp | Jun 2025, Feb 2025, Nov 2024 | |
| Elevated Ukraine GPR | +1 | 24.0% (2170 d) | -1.44% | -0.84pp | Mar 2026, Jun 2023, Nov 2021 |
The historical pattern
The signal across thirty-six years of Ukraine geopolitical events
THE TRACK RECORD
State changes
| State | Start | End | Duration | Fwd 60d Wheat |
|---|---|---|---|---|
| Negative | 10/23/2024 | 10/31/2024 | 7d | +4.92% |
| Neutral | 11/01/2024 | 12/18/2024 | 33d | +5.39% |
| Negative | 12/19/2024 | 01/31/2025 | 29d | -3.52% |
| Neutral | 02/03/2025 | 03/31/2025 | 40d | -7.23% |
| Negative | 04/01/2025 | 05/30/2025 | 42d | +9.62% |
| Neutral | 06/02/2025 | 06/30/2025 | 20d | +9.10% |
| Negative | 07/01/2025 | 02/27/2026 | 167d | +6.73% |
| Positive | 03/02/2026 | 03/31/2026 | 22d | +9.34% |
| Negative | 04/01/2026 | 10/23/2026 | 143d | +13.09% |
Scroll inside the table for the full history. Forward 60-day Wheat 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
Ukraine conflict risk transmits directly to global wheat supply because Ukraine is a top-5 exporter; elevated risk around Ukraine events historically drives an initial shock spike in wheat futures followed by 60-day mean-reversion. The composite reads the Caldara-Iacoviello GPR Ukraine country component (text-mined from US/UK/Canadian newspapers), z-scores it, and bounds with tanh. State thresholds plus-or-minus 0.2 (moderate) and plus-or-minus 0.5 (extreme).
Why it matters
Why Ukraine GPR reads directly into wheat supply
Ukraine is a top-5 world wheat exporter, with Black Sea ports (Odesa, Chornomorsk, Mykolaiv) handling the bulk of outbound cargoes. Russia-Ukraine conflict episodes directly disrupt port operations, export corridors, and shipping insurance; those disruptions transmit to global wheat supply within days. The Caldara-Iacoviello GPR Ukraine component captures risk perception as it moves through newspaper coverage, which historically leads the forward wheat curve.
Why the empirical direction is counter-intuitive
Naive reasoning says "elevated Ukraine GPR = supply tightens = bullish wheat." The data shows the opposite over 60-day horizons. Shock episodes drive an initial price spike that overshoots fundamentals; over the subsequent 60 days the market mean-reverts as positioning unwinds and alternative-supply responses (increased US / EU / Russia exports, grain-corridor agreements) stabilize flow. Quiet Ukraine periods empirically precede modest-positive wheat returns as the premium drains.
How to use this signal today
Treat Ukraine GPR as a regime overlay on the Black Sea supply stack. Pair with the Russia Wheat Production YoY signal (physical Russian supply), the Novorossiysk Cargo Pace signal (realized export flow), and the EU27 Wheat Production YoY signal (alternative supply). When Ukraine GPR is extreme-positive and the other three show no corroborating physical tightness, the mean-reversion short-wheat setup is strongest.
Signal consumers and siblings
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 refer to the research brief for the full disclaimer.
Last refreshed Nov 04, 2026 01:26 AM ET