CF (CF), itself the target of a hostile bid from Agrium (AGU), said in a letter to Terra's board that it was "prepared to meet immediately and to sign a merger agreement before the market opens on Monday, December 7th." Last month, Terra shareholders voted to add three people proposed by CF to its board, increasing the chances CF's bid would be successful. Premarket: CF -5.1%. TRA +8.1%. AGU +1.8%.