
South Korean authorities confirmed highly pathogenic avian influenza (H5N9) at a layer farm in Yeoncheon, Gyeonggi, holding about 91,000 hens, the first such case this winter. Authorities imposed a nationwide 24-hour livestock movement halt, tested 17 farms within 10 km, and designated a two-week nationwide disinfection period.
Layer losses and culling tighten domestic egg supply and keep egg prices elevated, which can lift demand for feed ingredients like corn and soymeal in the short term only if flock losses spread; the immediate effect is limited to Korean egg and poultry markets.
After 145 past neutral disease events, Corn moved a median +0.4% over 5 sessions (58% higher; middle half -1.2% to +1.7%), and +0.0% over 20.
After 98 past neutral disease events, Soybean Meal moved a median -0.2% over 5 sessions (44% higher; middle half -1.9% to +1.5%), and -0.4% 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.