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Angus Journal's Policy Matters column describes USDA efforts to rebuild US defenses against New World screwworm. The parasite was eliminated from the US decades ago but spread back through Central America and Mexico, leading USDA to close the border to Mexican cattle in November 2024.
Screwworm controls govern when Mexican feeder cattle can enter the US, so they shape the cattle supply outlook and price risk.
angus.orgAug 10, 2026After 29 past neutral disease events, Feeder Cattle moved a median +0.6% over 5 sessions (62% higher; middle half -1.5% to +2.2%), and +1.0% 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.
