We recall commenting a short while ago that the fundamental outlook for corn and corn prices was relentlessly bearish. We cited a very large U.S. corn crop for the 2020/21 crop cycle that would push U.S. corn stocks to a burdensome level.  Moreover, lagging domestic feed demand, stagnant ethanol production and aggressive export pricing by competing exporters with large corn stocks of their own would push U.S. corn stocks to the highest level in many years. Fund managers obviously held the same view as they built up a huge short position of over 300,000 contracts of CME corn futures.   What a difference a day makes! Or more specifically, what a difference USDA reports can make. The planted acreage estimates and 1 June quarter...