Often before the release of major USDA reports we have warned that traders should not allow themselves to become too complacent about their pre-report analyses of what USDA will report. Surprising results are always possible. Monday’s report of quarterly U.S. grain and soybean stocks was a case in point. USDA’s report showed 1 September stocks of corn and soybeans were significantly lower than market expectations. The 1 September corn and soybean stocks also are ending stocks for the 2018/19 crop year that are carried over into 2019/20.     USDA reported that soybean stocks are 913 million bu, about 70 million bu or 7 percent less than the average trade prediction. Corn stocks are counted as 2.114 billion bu com...