Over the long weekend, rainfall in Argentina was limited to portions of Buenos Aires as the rest of the main crop areas remaining dry. That plus a forecast of little (if any) rain for the next 10 days set the stage for soymeal and soybeans to gap higher when the Monday night session opened. Both rallied strongly, pulling the grain markets along for the ride. At the peak, March soybeans were up 17.5 cents with March soymeal up $12.20 in active trade, both hitting new highs for the move and setting up a volatile day of trade for soy and grain markets. Besides the Argentine weather outlook and assumptions of ongoing damage to both the soybean and corn crops, macro factors are also lining up. Hedge funds and money managers are alert to signs t...