DredgeWire reports on a University of Wisconsin-Madison study finding that failure of any of 25 aging upper Mississippi locks could add nearly half a million truckloads on highways. It also cites over $1 billion in backlogged Corps maintenance on the Mississippi and Illinois rivers.
Longer lock outages would raise trucking and handling costs for grain moving to Gulf export positions. The study is a scenario analysis and does not signal a current supply shock.
Not enough comparable past events yet for a historical read.
After 1,054 past logistics events, Corn moved a median -0.1% over 5 sessions (48% higher; middle half -1.5% to +1.5%), and -0.0% over 20.
After 837 past logistics events, Soybeans moved a median +0.4% over 5 sessions (55% higher; middle half -1.5% to +2.0%), and +0.6% 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.