George Soros, the hedge fund billionaire, has failed in his latest attempt to overturn an insider dealing conviction handed out in France 23 years ago. The European Court of Human Rights rejected his argument that French law on insider trading was not sufficiently clear to provide grounds for a conviction. Soros's lawyer, Ron Soffer, said that he would appeal the ruling. "Mr Soros has maintained that he did not commit any act of insider dealing," he said, adding that "many issues" were still unresolved and that he was confident the ruling would be over turned on appeal. The case relates...