Core tip: According to foreign media on December 14, as of the week ending December 12, 2025, the global corn market fluctuated with a slight decline. On one hand, the global corn supply is sufficient, with a promising outlook for South American corn production, and the drop in international crude oil futures, along with declines in soybeans and wheat, put downward pressure on corn; however, on the other hand, robust U.S. corn export sales, and a more abundant USDA supply and demand report, limit the downward space for corn prices.