High crop prices could start to erode demand and bring more acres into production worldwide, Iowa State University crop markets specialist Chad Hart said last week. However, he said prices are likely to remain volatile until this year’s U.S. crop production estimates are more certain.

“They’re going to ride with every headline,” he said. “Even if we have that normal trendline crop, we’re still looking at fairly tight stocks.” 

Last week’s USDA World Agricultural Supply and Demand Estimates (WASDE) forecast corn ending...