Core tip: According to foreign media on December 28, as of the week ending December 26, 2025, the global corn market saw a mild increase, mainly reflecting strong U.S. corn export sales, a strengthening international crude oil market, and concerns over Black Sea grain exports due to the Russia-Ukraine conflict. However, the global corn supply remains ample, with a promising outlook for South American corn production, continuing to exert downward pressure. This situation of ample corn supply and strong demand has also led to a range-bound fluctuation in prices over the recent period.