Overnight strength gave way to some aggressive selling in the soybean market almost immediately after the day session opened. That took soybeans and corn lower and wheat off its highs. General Comments Markets were very firm during the Sunday evening session and were again led by soybeans. Those overnight gains pushed the January soybean contract right up against significant technical resistance. Corn and wheat futures were also firm. There were no export sales announcements this morning. Overnight strength gave way to some aggressive selling in the soybean market almost immediately after the day session opened. That took soybeans and corn lower and wheat off its highs.It was not a great opening to the holiday shopping season in the U.S.,...