
Corn futures closed at the daily limit of 40 cents lower on May 13, 2021, and soybean futures fell about 58 cents. The selloff followed reports that stalled grain barges on the Mississippi River, after a cracked bridge slowed barge traffic.
Private exporters also reported sales of 680,000 metric tons of corn to China for 2021/22.
Barge bottlenecks on the Mississippi delay grain movement from the Midwest to export positions, which pressures nearby cash and futures prices for corn and soybeans. Feed buyers in the interior may see wider basis and freight-related cost swings until the river reopens.
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.