The West Australian premier has again accused BHP Billiton and Rio Tinto of flooding a depressed iron ore market, putting further downward pressure on the commodity's price.

A week after saying the companies were “flawed in trying to manage the world price of a commodity” and telling them to “remember who your landlord is”, Mr Barnett has lashed them again. Business and economic logic suggested the “normal reaction” to a falling iron ore price would be to…