Placing a spotlight on insider trading has emerged as an unintended consequence of the introduction of a carbon tax/emissions trading scheme. Someone made a killing out of trading the steel industry stocks Bluescope and OneSteel before the announcement of the detail of the carbon tax package. It could turn out to be a hot potato that no one really wants to be left holding, but one that will gain enough media attention it cannot be ignored. The embarrassing aspect of this particular instance is the leak of market-sensitive information came from the ranks of the government or the legion of public servants who were aware of the details of the carbon tax package before it was released to the public on July 10. The particular element of the carbon tax initiatives which is the focus of the insider-trading claim centres on the $300 million concession package for Bluescope and OneSteel, Australia's two steelmakers.