
Barge spot rates at St. Louis reached $23.34 a ton as of Aug. 29, up 49% from the prior week and 42% from a year earlier, according to USDA data.
Shrinking Mississippi River water levels are driving the increase, with below-average rainfall forecast.
Higher barge freight raises the cost of moving grain from the Midwest to export positions and tends to weaken local cash basis, lowering farm-gate and interior prices relative to futures.
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, SOY moved a median +0.3% over 5 sessions (54% higher; middle half -1.5% to +1.8%), and +0.7% over 20.
Not enough comparable past events yet for a historical read.
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.
Reports the St. Louis spot rate hit $23.34/t as of Aug 29, up 49% week over week, matching the observed move, though published after the move date so it is confirmation rather than a cause.