
African swine fever has spread across three southern Vietnamese provinces, Ca Mau, Tay Ninh and An Giang, and local authorities have tightened controls. About 3,460 pigs have been culled across the three provinces this year, with most outbreaks on small farms lacking biosecurity.
Culling and reduced pig herds cut domestic feed demand in Vietnam, a modest bearish signal for imported feed ingredients such as soybean meal and corn. The scale is small relative to global markets, so the price effect is limited.
After 167 past bearish disease events, Soybean Meal moved a median -0.6% over 5 sessions (40% higher; middle half -1.8% to +1.4%), and -0.8% over 20.
After 175 past bearish disease events, Corn moved a median +0.0% over 5 sessions (51% higher; middle half -1.7% to +1.5%), and +0.6% 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.