USDA tends not to “over-guess” a crop in August and the October WASDE tends to be closer to a crop’s final numbers, but this year is baffling some in the trade. The uncertainty started last year when a late-planted crop led to low expectations but then USDA raised the forecast corn yield in August 2019 by 3.5 bushels/acre. It continued into 2020 when the June planted acreage report shorted the corn crop by 5 million acres below the March prospective plantings survey. Over the past five years, the trade has tended to underestimate USDA’s August corn numbers by an average 372 million bushels. This followed a few years in which the opposite bias existed (see graph below). Wildcards in just the past 24 hours include a c...