There was no unexpected export business around or any adverse weather forecast that could have been the cause. This would seem to be a good old-fashioned short covering rally ahead of next Friday's USDA reports that was led by some significant fund buying.Traders turned their screens on last night expecting to see lower openings ahead of this Friday's USDA reports and with what looks like generally good harvest weather ahead. That didn't happen. Instead, markets opened very strong, led by soybeans with wheat and corn a lengthy distance behind. By this morning, November soybean futures were trading 15-16 cents higher and bumping right up against last week's technical resistance at $9.30. They eventually traded as high as $9.43 and closed jus...