CORN RISING: Corn prices skyrocketed as summer heat baked Midwestern crops. There's little to no rain in the forecast. The hot weather has hit during a critical pollination period for the crops. Analysts say the longer the fields go without rain, the more the crops may be damaged.
EUROPEAN HANGOVER: Other commodities were mostly higher after Spain formally requested help for its troubled banking system. Investors also looked ahead to a European summit later this week where leaders will discuss the debt crisis.
MIXED BAG: Gold, silver, industrial metals and natural gas rose. Oil prices fell.