SWEET WHEAT: Wheat prices fell, as did those of corn and soybeans. Rain this week has made investors more optimistic about how much farmers will be able to harvest after a summer drought.
IMPERFECT STORMS: Hurricane Isaac passed last week without inflicting as much damage as some had feared. That also helped push down prices for some key crops. But more tropical storms are lurking in the Atlantic.
STRUGGLING FOR DIRECTION: Precious metals fell while industrial metals rose. Oil prices in New York rose, while other energy futures fell.