Goldcorp (GG) -4% AH after lowering its 2012 gold production guidance to 2.35M-2.45M oz., below prior guidance of 2.6M. The lower production will lead to an average cash cost of $310-340/oz. on a by-product basis and $625-$650/oz. on a co-product basis, below prior guidance of $250-$275 and $550-$600. Goldcorp blames de-stressing activities at its Red Lake mine, and water shortages at its Peñasquito mine.