
The USGS river gage at Memphis, Tennessee, may fall to severe low levels for the fourth year in a row. The Mississippi has dropped below the zero reference point during harvest in eight of the last ten years, and the river has reached the National Weather Service's low stage five times.
Low river levels push barge freight rates up and widen local cash basis discounts, which lowers farm-gate prices for corn and soybeans in the affected Midwest and Gulf-linked catchments. Freight costs for grain moving to export positions rise as a result.
Not enough comparable past events yet for a historical read.
After 359 past bearish logistics events, Corn moved a median -0.3% over 5 sessions (44% higher; middle half -1.5% to +1.5%), and -0.5% over 20.
After 297 past bearish logistics events, Soybeans moved a median +0.3% over 5 sessions (54% higher; middle half -1.5% to +1.8%), and +0.7% 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.