Corn
WATCHStress 5/10
- Sorriso: week-ahead forecast shows severe deficit rainfall
- Pergamino: severe deficit rainfall — 39% of the 30-day normal
- Zhengzhou: severe deficit rainfall — 20% of the 30-day normal
Guided scenario
What if a 2012-style drought hits the US corn belt?
The US is the top corn exporter. Explore what another 2012 would expose.
1The setup
The United States is 30.3% of world corn exports by value (2024 vintage) — the largest corn exporter. In 2012 a hot, dry summer cut deep into the corn belt. This guide walks through what the monitor is seeing right now, how exposed the market is, and lets you model a drought yourself.
2Right now
Monitor data as of Sep 24, 2026. Scores are observed readings, not forecasts.
3The exposure
- United States30.3%
- Brazil18.7%
- Argentina16.4%
- Ukraine13.1%
- France2.3%
How the shock travels
Follow the shock downstream — from the corn 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: corn futures spike
timing not establishedLag basis: lag not established in sources reviewed
corn futuresLivestock and poultry producers (feed costs)
timing not establishedLag basis: lag not established in sources reviewed
chickeneggsporkbeefTyson Foods
TSNCorn, soybean meal and other feed ingredients represented roughly 61% of the cost of growing a live chicken in fiscal 2023
Source: Tyson Foods FY2023 10-K
Pilgrim's Pride
PPCIts U.S. and Mexico segments use corn and soybean meal as the main ingredients for feed production; its Europe segment uses wheat, soybean meal and barley
Source: Pilgrim's Pride 10-Q (SEC)
Ethanol producers
timing not establishedLag basis: lag not established in sources reviewed
ethanoldistillers grainscorn oilGreen Plains
GPREVertically integrated ethanol producer that buys and sells bulk grain, primarily corn and soybeans, to make ethanol and co-products
Sweeteners and soft drinks
timing not establishedLag basis: lag not established in sources reviewed
high fructose corn syrupsodapackaged foods
Illustrative scenario. Not a prediction. Not financial advice. Company entries describe factual exposure to the commodity — not a view on any stock.
Trade map
Who ships it, who can’t do without it
2024 vintage · annual data, 1–2y lagSourced trade structure — the scenario’s shock geography at country resolution. Exposure, not a forecast.
Corn · United States
Top exporters
United Statesdominant
30.3% of world exports
Brazil
18.7% of world exports
Argentina
16.4% of world exports
Ukraine
13.1% of world exports
France
2.3% of world exports
Note: maize; seed 100510 excluded (negligible) Build used HS 100590 (maize excl. seed; 100510 seed excluded).
Exposed importers
Shocked exporters: United States
99.8% of Mexico’s corn imports come from United States
83% of Japan’s corn imports come from United States
24.7% of South Korea’s corn imports come from United States
US Gulf export system to Asia
via Panama Canal · 17% of US corn exports transiting the Panama Canal
Source: farmdoc daily (University of Illinois), 'Ripple effects of shipping lane disruptions on U.S. agriculture', FY2022
How we map this
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 corn 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
80%
Historical check: The closest episode, US drought, 2012, saw corn futures move +22.3% (large band); your 80% disruption setting sits in the extreme band.
What share of United States’s corn exports is disrupted.
Resolution: Share of the focus exporter's shipments disrupted
Share of world exports
0%50%100% of world exports
United States corn — 30.3% of world Corn exports (Share of global export value (USD) — 2024 vintage)
Exposed under your assumptions: 24.2% (30.3% × 80% severity)
The hatched area is modeled from your assumptions, not a measured outcome.
Exposed ≠ lost — affected trade can reroute, draw stocks, or substitute. This sizes the exposure, not the damage.
120d
Historical check: The closest episode, US drought, 2012, lasted 122 days (medium); your 120-day duration sits in the medium band.
Resolution: Days the disruption lasts
60d
Your assumption — not a measured buffer.
Resolution: Assumed days of stockpile cover — an assumption, not a measured buffer
Disruption timeline
090180270365 days
Disruption: 120 days
Assumed cover: 60 days — your assumptionYour assumption
60 days buyers can't ride out — not automatically a physical shortage
What this would have meant
At these settings, about 24.2% of the world's corn exports would be exposed to the disruption, and the disruption runs 120 days against 60 days of assumed stockpile cover, leaving about 60 days beyond what the assumed stockpile covers.
The closest recorded episode, US drought, 2012, saw corn futures rise +22.3% in 184 days (Feb 2012 → Aug 2012), and for consumers: grade A large eggs (US) rose +15.7% to +20.2% over 3–5 months. Illustrative — what happened then, not what will happen now.
What this assumes
- Exposure: Target share 30.3% × severity 80% = 24.2% exposed.
- Uncovered days: max(0, 120 − 60) = 60.
- Exposed ≠ lost: affected trade can reroute, draw down stocks, or find substitutes — this number sizes the exposure, not the damage.
- Exporter share ≠ spare capacity: rivals may not be able to surge supply to fill the gap.
- Stockpile cover of 60 days is your assumption, not a measured buffer.
- Results are physical-exposure arithmetic from your stated assumptions — not a price forecast.
Analog check
Your settings look closest to US drought, 2012 (same commodity, same shock type, similar duration, similar supply concentration). The episode's measured moves, caveats included: corn futures +22.3% in 184 days (Feb 2012 → Aug 2012); Grade A large eggs (US): +15.7% to +20.2% over 3–5 months. Egg prices also move with holiday baking demand each December, energy and transport costs, and layer-flock size — not feed corn alone..
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 80% disruption setting implies an extreme move, while the episode's futures move was +22.3% (large).
Read the full recordHow we matched this
- Commodity: requirement — Both are corn — non-corn episodes are excluded outright.
- Shock type: 2/2 — Both are a drought shock.
- Size: 0/1 — Your 80% disruption setting band: extreme; episode futures moved +22.3% (Feb 2012 → Aug 2012) — band: large. Severity is % of shipments disrupted, not a price move: this banding is a v1 matching heuristic.
- Duration: 1/1 — Your disruption: 120-day (medium); episode: 122-day (medium) — Jun–Sep 2012 acute drought window (repo event record us-corn-drought-2012).
- Supply concentration: 1/1 — Your hazard zone: 30.3% of world exports (high); episode disrupted ~39% (high) — US 39.1 MMT of 99.3 MMT world corn exports in 2011/12 ≈ 39% (USDA FAS trade data, via Grain: World Markets and Trade circular FG 07-12, Jul 2012).
Score 4/5 — close analog (headline).
Want the full controls? Reopen corn on its commodity page.
5What happened before
For perspective, not prediction
2012: the US drought that took a quarter off the corn crop — then the market took it back
Jun – Sep 2012
“The sharpest single-season corn shock on record sent CBOT corn futures up more than a fifth in six months — then a normal 2013 season erased the entire spike within a year. Weather moves the price; the next harvest moves it back.”
Price moves were observed around the event — not proof the event caused the entire move.
Read the full recordEl Niño: the climate driver that doesn't always deliver
Recurring — 2009-10, 2015-16, 2023-24
“El Niño moves the weather, not always the price. In 2015–16 wheat fell sharply but tracked outcomes were mixed (rice +7.7%, soy +2.1%) while sugar spiked — fear the mechanism, measure the outcome.”
Price moves were observed around the event — not proof the event caused the entire move.
Read the full recordWhat to watch
- US Drought Monitor maps across the Corn Belt through the growing season
- USDA crop condition ratings for corn (the good/excellent share)
- USDA WASDE yield and production estimate changes for corn
- December corn futures relative to the 2012 record of $8.49/bu
Curated by Morrowfly — these are things to check, not monitor conditions.
Make it yours
Your call, in your words — recorded privately on this device, with a check-back in 30, 60, or 90 days.
Tell us
Spotted something wrong, confusing, or missing? It goes straight into our improvement queue.
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Read by a human · never auto-published