Billionaire investor's conviction stands

France's highest court has confirmed billionaire investor George Soros' conviction for insider trading but sent the matter back to the appeals court to determine the fine.

The Hungarian-born financier was convicted of buying and selling Societe Generale shares in 1988 after receiving information about a planned corporate raid on the bank.

He has vowed to pursue an appeal in the European Court to clear the legal stain that mars his 40-year investing career.