Spot trading on Argentina's main grains and oilseed market has slowed sharply as farmers hold on to their crops in the expectation this month's presidential run-off vote will lead to a reduction in hefty export taxes. Ruling party candidate Daniel Scioli has been forced to follow his conservative challenger Mauricio Macri's lead with a promise to scrap export taxes on corn and wheat, and a gradual reduction of the levy on soy shipments.
