Chicago Mercantile Exchange (CBOT) wheat futures experienced a rise due to export demand, with May soft winter wheat in Chicago, hard winter wheat futures in Kansas City, and spring wheat futures also increasing. This was the first weekly gain for wheat and corn futures in five weeks, driven by strong US corn export demand and market turmoil over a grain deal extension. Meanwhile, soybean contracts fell for a week in a row. The USDA's reports on sales of American old crop corn to China and the weakening dollar also supported US commodities. Additionally, the article covered the outcomes of grain market negotiations, the potential impact on crops from rainstorms in Argentina, and a decrease in production forecasts for soybeans and corn in Argentina.