
New World screwworm moved north in Mexico and closed the U.S.-Mexico border to live cattle in July 2025. Feedyards in Texas that rely on Mexican cattle are running at around 70% of capacity, and Mexican cattle are selling at about half their usual price.
The closure cuts feeder cattle supply into U.S. feedlots, which supports feeder prices. Excess cattle on the Mexican side are depressing local values.
After 122 past bullish disease events, Feeder Cattle moved a median +0.4% over 5 sessions (60% higher; middle half -1.0% to +1.6%), and +2.0% over 20.
After 148 past bullish disease events, Live Cattle moved a median +0.4% over 5 sessions (62% higher; middle half -0.5% to +1.2%), and +1.4% 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.
Published Oct 17, it describes the screwworm-driven closure of the Mexican cattle border, which keeps feeder supply tight and supports live cattle prices, but it is background information rather than a new shock on Oct 20.