The ag trading world is abuzz with discussion of the coming Grain Stocks and Prospective Plantings reports that USDA will release on Friday. The stocks report is usually relatively (we use that word loosely) easy to predict but the planting numbers notoriously escape the range of pre-report estimates routinely. That should set the stage for volatility and excitement to end the week. Recently, amid China’s sustained corn buying and a dicer weather outlook for the U.S. spring planting effort, the CBOT’s sentiment has been shifting more bullish for the coming reports. That trend continued Wednesday, though traders were somewhat less willing to extend their long positions with just two days before the reports. Corn, soybeans, and CB...