Even though it didn't seem like there was much of any weather premium in the market before this week's rainfall, the speculative trade evidently felt there was.This was another bad week for the U.S. wheat market. By some accounts, it might have been one of the worst in several years. Kansas City wheat futures dropped to their lowest levels since 2010. Depending on the class of wheat, prices were down another 35-50 cents. There were several reasons for this week's poor performance:

It finally rained across the driest western portions of the U.S. hard red winter wheat region with a chance for more precipitation in the days ahead. The rains do not appear to be as widespread as forecast. Some areas didn't see any, while others received up to...