The top options trade so far today is in Monsanto (MON). Shares added $2.85 to $60 and a block of 9,500 Jan 2012 $80 calls traded at $2.97 per contract on ISE. It’s an opening customer buyer, according to ISEE data. The gains in the stock and premium buying might be in reaction to an update of the company’s Genuity Roundup Ready 2 yield soybean field trial data. It showed significant yield boost over competitive Roundup Ready products.