Lin Xie the "economist" first spruiked the $50/t line in early sept 2012, when the price was been badly knocked around. Nobody took too much notice of him then - perhaps he decided to give it another run. If I remember he stated that the price would not recover from what it was at that stage.
Being an academic he never got around to explaining who would be mining any IO at that price, perhaps he thinks it is a luxury.
