The state of the U.S. crops has made a sudden change in recent weeks. 

For much of the growing season, the U.S. corn and soybean crops were highly rated and some of the best seen in recent history. While still higher than normal, we have seen the top end of the ratings decrease as hot, dry weather has impacted both crops. 

Reports of sudden death syndrome have also been reported in U.S. soybean fields to further reduce yield expectations. 

The question now is how ...