By The Associated PressON THE REBOUND: Soybeans rebounded, following two weeks of losses, after Argentina didn't the rain that was forecast over the weekend. The beans had been falling on expectations of a bumper crop in South America. SNOW WHEAT: Wheat fell on forecasts of snow reaching the Plains. That would give the soil in the region much-needed moisture and help this year's harvest. COPPER BOTTOM: Copper fell 2.3 percent, its biggest drop since October, on speculation that demand from China is set to wane. China is one of the world's biggest consumers of the metal.