
The upper Mississippi River reopened to barge traffic on June 21 after U.S. Coast Guard clearances at St. Louis harbor. Dozens of towboats and hundreds of delayed barges then tried to maneuver upriver at once.
The river had not been fully navigable since November because of winter closures and spring flooding.
Barge bottlenecks slow the movement of export-bound corn and soybeans to Gulf terminals, which tightens freight availability and supports barge rates while stocks build up in the farm belt.
Not enough comparable past events yet for a historical read.
After 284 past neutral logistics events, Corn moved a median -0.0% over 5 sessions (49% higher; middle half -1.3% to +1.4%), and -0.2% over 20.
After 230 past neutral logistics events, Soybeans moved a median +0.4% over 5 sessions (55% higher; middle half -1.4% to +2.0%), and +0.1% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.