On the measured lane, 97% of Black Sea/EU wheat to Asia transits Suez. Model the delay.
1The setup
On the measured lane — European, Russian, and Ukrainian wheat shipments to selected Asian countries and Eastern Africa — 97% transits the Suez Canal (WTO Wheat Dashboard, pre-crisis baseline). A closure doesn't destroy grain; it stops the clock. This guide walks through what the monitor is seeing right now, how the lane works, and lets you model a closure yourself.
Market check · Polymarket
What the market thinks
Bab el-Mandeb Strait effectively closed by...?
Polymarket · live contract
19%
implied chance of “Yes” on Bab el-Mandeb Strait effectively closed by December 31…
The market says 19% — think the real chance is higher or lower? Take a side and we'll track your call against the live market as it moves.
Your take lives on this device only. Illustrative — not a bet, not advice.
Closest live contract — Bab el-Mandeb, the strait's southern approach on the Red Sea lane that feeds Suez. It is not a contract on the Suez Canal itself.
Illustrative only — not financial advice, not a recommendation.
2Right now
🌾Wheat
WATCH
Stress 5/10
›Odesa: week-ahead forecast shows severe deficit rainfall
›Ludhiana: severe deficit rainfall — 29% of the 30-day normal
›Ludhiana: week-ahead forecast shows severe deficit rainfall
Monitor data as of Sep 24, 2026. Scores are observed readings, not forecasts.
3The exposure
Russia
15.8%
Canada
13.6%
United States
11.7%
Australia
9.9%
Ukraine
8.3%
Share of global export value (USD) — 2024 vintage. Amber = the scenario focus. Ranked by share.
Black Sea/EU → Suez (Asia lane)
97%of the measured lane transits Suez
Share of EU/Russia/Ukraine wheat shipments to selected Asian countries and Eastern Africa transiting Suez, pre-crisis baseline (WTO Wheat Dashboard). Disclosed scope — not all RU+UA exports.
How the shock travels
Follow the shock downstream — from the wheat market, through processors, to the shelf. These are the usual stages, not this scenario's outcome: exposure at each step, never a prediction.
Day 0: wheat futures spike
timing not established
Lag basis: lag not established in sources reviewed
wheat futures
Flour millers and wholesale wheat flour
typically within ~1 month →
Lag basis: USDA ERS Amber Waves (June 2011): most of a farm wheat price change was passed on to wholesale wheat flour prices within the first month
wheat flourbulk flour
Bread, pasta and cereal on the shelf
typically 1–6 months →
Lag basis: USDA ERS (Leibtag, 2009, cited in USDA presentation): retail bread pass-through time 1 to 6 months; Amber Waves (June 2011): wholesale flour to retail bread mostly after 2–4 months when wholesale prices fell or rose modestly, within the first month during surges
breadpastacerealbaking mixes
General Mills
GIS
Grains including wheat and corn are listed as principal ingredients, and wheat is used across its cereals, baking mixes and flour products
via Suez Canal · 97% of EU/Russia/Ukraine wheat shipments to selected Asian countries and Eastern Africa transiting the Suez Canal, pre-crisis baseline
Exporter and importer shares are 2024 vintage · annual data, 1–2y lag from UN Comtrade and OEC (BACI/CEPII); an importer counts as exposed when ≥20% of its wheat imports come from a shocked exporter. The shock geography is the scenario’s own focus selection. Annual data with a 1–2 year reporting lag — the structure moves slowly, the prices don’t.
4Adjust the assumptions
30d
Historical check: The closest episode, Black Sea, 2022, lasted 148 days (medium); your 30-day canal closure sits in the medium band.
How long the lane stays closed. Duration changes the timeline — never the flow share.
Resolution: Days the lane stays closed or throttled
29.1
lane-days disrupted
30d \u00d7 97% of the lane via Suez
What the delay looks like
day 1day 180
A shipment that would have transited Suez on day one waits roughly the full 30 days. Rerouting avoids the queue at the cost of a longer voyage. Either way the shipment is delayed, not destroyed.
Delayed ≠ lost — the disruption stops the clock on shipments; it doesn't destroy wheat.
What this would have meant
At these settings, Suez stays closed for 30 days. About 97% of the measured lane flows through it, so roughly 29.1 lane-days of shipments are delayed — delayed, not destroyed: the cargo still exists, it just arrives late.
The closest recorded episode, Black Sea, 2022, saw wheat futures rise +62.7% in 12 days (23 Feb 2022 → 7 Mar 2022), and for consumers: retail bread (US) rose +7.2% to +11.3% over 4–6 months. Illustrative — what happened then, not what will happen now.
What this assumes
Canal closure \u2014 30 days \u00d7 97% of the lane = lane-days disrupted. Duration changes the timeline, never the flow share.
Delayed ≠ lost: the cargo still exists — only its arrival is late.
Share of EU/Russia/Ukraine wheat shipments to selected Asian countries and Eastern Africa transiting Suez, pre-crisis baseline (WTO Wheat Dashboard). Disclosed scope — not all RU+UA exports.
Illustrative arithmetic from your stated assumptions — not a price forecast.
Analog check
Your settings look closest to Black Sea, 2022(same commodity, same shock type, similar size, similar duration, similar supply concentration). The episode's measured moves, caveats included: wheat futures +62.7% in 12 days (23 Feb 2022 → 7 Mar 2022); Retail bread (US): +7.2% to +11.3% over 4–6 months. 2022's bread move also reflects soaring natural-gas and diesel costs (fertilizer and freight) and broad post-pandemic food inflation — not all of it traces to the wheat shock..
Only about 11.8¢ of every US consumer food dollar — and 18.5¢ of every food-at-home dollar — reaches the farm (USDA, 2024) — that's a ceiling, not a prediction: margins can absorb a spike or amplify it.
Illustrative — what happened then, not what will happen now. Your scenario differs: your scenario is a hypothetical — the episode is history, and its prices moved with the whole economy (energy, freight, demand), not just this shock.
The record holds no lane-closure episode: this match is against past wheat shock episodes, while the delay itself is sized from your settings above — not from history.
Commodity:requirement — Both are wheat — non-wheat episodes are excluded outright.
Shock type:2/2 — Both are a conflict shock.
Size:1/1 — Your 100% disruption setting band: extreme; episode futures moved +62.7% (23 Feb 2022 → 7 Mar 2022) — band: extreme. Severity is % of shipments disrupted, not a price move: this banding is a v1 matching heuristic.
Duration:1/1 — Your disruption: 30-day (medium); episode: 148-day (medium) — Ukrainian commercial shipping suspended 24 Feb 2022; Black Sea Grain Initiative signed 22 Jul 2022 (repo event records russia-ukraine-war, bsgi-exit-2023).
Supply concentration:1/1 — Your hazard zone: 24.1% of world exports (moderate); episode disrupted ~30% (moderate) — Russia and Ukraine together were about three-tenths of world wheat exports (Reuters, Mar 2022 — repo event record russia-ukraine-war).
“A 400m ship blocked Suez for six days and 400+ vessels queued — oil wobbled $2.60 and reversed, and no verifiable agricultural price reaction followed. A timing shock, not a supply shock. Kept in the dataset only as an explicitly limited non-attribution case.”
Price moves were observed around the event — not proof the event caused the entire move.
“Houthi attacks rerouted a third of Red Sea container traffic and roughly halved Suez trade — and grain prices fell anyway on record supply. The freight shock lived in shipping rates, not commodity prices.”
Price moves were observed around the event — not proof the event caused the entire move.
Russia invades Ukraine: the Black Sea grain and fertilizer shock
Feb 2022 –
“A real Black Sea supply shock — Ukrainian exports stopped, fertilizer spiked — and the price spike faded over months as other exporters filled the gap, demand rationed, and Russia's own record crop arrived. This episode only: one case, not a rule about shocks.”
Price moves were observed around the event — not proof the event caused the entire move.