What if Mississippi River low water repeatedly halts grain barges?
Recurring drought drops the lower Mississippi below navigation depth at harvest, stranding export grain barges and widening Gulf basis and freight.
25%
our model probability over 1–3 years
prediction markets — wisdom of the crowd
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◎ Empirically anchored 25%· 90% range 14–36%· 40 analogues · measured class energy 99% in 3 yr · 3% held back for the unknownhow we built this number — every step
Measured class rate — energy ≈1.4869/yr → 99% in 3 yr99%
Analyst prior · editorial share 26% of the class26%
Pooled · weight 87%25%
Crowd — no liquid market—
Reserve 3% · no extremizing (×1.0)25%
Published25%
The class rate is measured from our dated, sourced event library (decade-normalized Poisson — the full table is public at base_rates.json). The variant’s share within its class is the analyst’s editorial call, published so you can audit it. A wider range means thinner precedent. Full recipe: methodology · scored at Reality Check.
The butterfly cascade
How this trigger trickles across markets, left → right — the root shock, its first‑order moves, then the ripple effects. Drag any node; tap a market for its real price history.
Resolution timeline — how this probability is moving
Our model's odds (gold) over time vs the crowd's (Polymarket, blue), from the past toward the 1–3 years horizon. Each dot is a real macro event that nudged the probability — green pushed it up, red pushed it down. Tap a dot for the source. The gold path is an illustrative reconstruction anchored to today's estimate — real dated events, not a live re-estimate history.
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What it would mean
If this plays out, it is a mixed shock. Recurring drought drops the lower Mississippi below navigation depth at harvest, stranding export grain barges and widening Gulf basis and freight. The trigger decomposes into signed root‑shocks — Corn ▲ · Wheat ▲ · Climate/crop supply ▲ · Diesel ▲ — which propagate through our causal graph to the markets below.
If it happens — the markets it would move
Biggest moves first. Projected moves are cascade-model priors; hist A–B% = what comparable past events actually did (measured abnormal returns), and model prior · unmeasured marks markets with no analogue backing yet. Tap any market for its price history.
Market
Class
Projected move
1
CornCORNon Hyperliquid📈 chart
Commodity
▲ +0.5%
hist -0.13–+1.08% · other way +1.88% (n=9)
2
WheatWHEATon Hyperliquid📈 chart
Commodity
▲ +0.5%
hist -0.05–+0.8% · other way -4.13% (n=9)
Probable recommendation
If the scenario above plays out, the probable cross‑asset positioning → a scenario‑conditional read, not personalized investment advice
For a common-man portfolio: Mixed for a typical portfolio — the move is more about rotation than direction. Favour the winners over the losers below rather than net exposure.
Historical precedent — what analogous events actually did
Across 40 analogous events (overlap‑weighted), as abnormal returns — market beta stripped, so it's the event's own effect, not the market backdrop. Shown at 20 days (persistent) and 5 days (immediate); ↺ fades = the two horizons disagree. Confidence = consistency × sample × significance.
H5N1 bird flu record US egg prices 2025-04↗Henry Hub natural gas falls to an all-time inflation-adjusted low on record output 2024-11↗Niger coup d'etat 2023-07↗PJM grid emergency during Winter Storm Elliott 2022-12↗European gas crisis intraday record spike 2021-10↗Texas grid failure during Winter Storm Uri 2021-02↗Norilsk Nickel Arctic diesel spill 2020-05↗WTI crude futures settle negative as demand collapses 2020-04↗IPBES warns ~1 million species face extinction 2019-05↗Oil collapses from $147 to the $30s as the GFC craters demand 2008-12↗Crude oil all-time high 2008-07↗Henry Hub natural gas spot price peaks during 2008 commodity boom 2008-07↗Platinum hits all-time record near $2,290 on South African power crisis 2008-03↗South Africa Eskom power emergency spikes platinum/PGMs 2008-01↗Amaranth Advisors natural-gas blowup 2006-09↗Northeast blackout cascading grid failure hits ~55 million 2003-08↗Argentina hyperinflation peak / Alfonsin early handover 1989-07↗Chernobyl disaster 1986-04↗Silver Thursday 1980-03↗Gold peaks at $850 1980-01↗Volcker Saturday Night Special 1979-10↗1979 Iranian Revolution oil shock 1979-01↗1974 sugar price spike to record 65+ cents 1974-11↗Nixon Shock 1971-08↗Iranian rial slides to a new record low 2025-12↗Gold tops $4,000 and silver spikes past $50 in historic squeeze 2025-10↗Fatal mud-rush halts Freeport's Grasberg, tightening copper supply 2025-09↗Trump's 50% copper tariff sends Comex copper to a record 2025-07↗Platinum hits an 11-year high on Chinese jewelry demand and deficit 2025-06↗Anglo American demerges Valterra Platinum 2025-06↗Iberian Peninsula total blackout 2025-04↗US egg prices hit record on persistent H5N1 2025-03↗Gold tops $3,000 for the first time amid tariff and rate-cut fears 2025-03↗USDA five-pronged plan to combat avian flu and egg prices 2025-02↗DRC suspends cobalt exports 2025-02↗DeepSeek shock crushes AI-power utilities Vistra and Constellation 2025-01↗Russian gas transit through Ukraine ends 2025-01↗Cocoa sets fresh all-time high above $12,000 2024-12↗Nasdaq Composite first close above 20000 2024-12↗Palladium jumps after US pushes G7 sanctions on Russian metal 2024-10↗