General Comments Markets opened weak yesterday afternoon. That weakness continued to build throughout the night and accelerated at 9:30 a.m. when the open outcry session got underway. None of yesterday's buyers were visible today, and it is difficult to explain where they all went. There was no overriding bearish news overnight. Corn and wheat weekly export sales numbers this morning were less than expected. Soybean export sales were slightly smaller than expected at 500,000 MT. No export sales were announced this morning, although there continues to be talk that China bought more soybeans.Markets today simply might have been saying: Now that we have the October USDA reports behind us, we don't have much to look forward to that would pro...