USDA Economic Research Service published a note on how farm shares of retail food prices move with commodity prices and marketing costs. It uses head lettuce, where weather-driven supply cuts in 2017 lifted the farm share to 38%, as an example.
The piece describes methodology rather than a new market event.
The article gives background on retail-to-farm price spreads but does not signal a change in grain, oilseed or feed prices.
After 664 past report events, Milk (Class III) moved a median -0.1% over 5 sessions (44% higher; middle half -0.7% to +0.5%), 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.