Yesterday was the beginning of the new corn marketing year, and a recent analysis indicates the direction of corn prices after 1 September seems to have a good track record as one of those unofficial barometers of presidential elections.Yesterday was the beginning of the new corn marketing year, and September corn futures closed at $3.11/bushel. The direction of corn prices after 1 September seems to have a good track record as one of those unofficial barometers of presidential elections, according to an analysis by Farm Futures magazine. It published some research on the correlation between the two about a month ago, which provided some interesting details.Since 1960, if corn prices increased between 1 September and Election Day, the White...