Crops can be traded on the futures market before they are harvested  If a poor corn harvest is predicted, prices of corn futures rise; if a bountiful corn harvest is predicted, prices of corn futures fall  This morning meteorologists are predicting much-needed rain for the corn-growing region starting tomorrow
Ttherefore, since adequate moisture is essential for the current crop' s survival, prices of corn futures will fall sharply today
Futures prices for corn have been fluctuating more dramatically this season than last season.