 Markets from commodity by bar chart. Chicago Board of Trade. Corn in September is down 14 at 396.5. December is down 13.5 at 410.5. March corn down 12.75 at 425.25. Soybeans in August down 20 at 1146.25. September is down 29.75 at 1096.25. November soybeans down 31.5 at 1098.25.