What if Mississippi high-water season restores cheap grain barging?
A wet upper-basin season lifts the Mississippi to full navigation depth, narrowing Gulf basis and cutting US grain-export freight costs.
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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 (electric blue) over time vs the market's (Polymarket, amber), from the past toward the 6–18 months 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. Loading the probability audit trail…
What it would mean
If this plays out, it is a mixed shock. A wet upper-basin season lifts the Mississippi to full navigation depth, narrowing Gulf basis and cutting US grain-export freight costs. The trigger decomposes into signed root‑shocks — Corn ▼ · Diesel ▼ · Food inflation ▼ · Risk appetite ▲ — which propagate through our causal graph to the markets below.