The traditional speculative trading funds are now holding a major short position in wheat (near a record) and have exited their long positions in corn and soybeans.Corn, soybean and wheat futures all gapped lower this morning following the long 4th of July holiday weekend in the U.S. The only hope for higher openings was possible major changes in the weather forecasts, which didn't happen. There is no dome of doom or high pressure ridging in the atmosphere that can bring even above-normal temperatures to the U.S. Corn Belt. That means that at the least the first 50 percent of the U.S. corn crop is going to pollinate under very good conditions with plenty of moisture and no heat. This, of course, has many in the trade talking about a nationa...