US regulators fine former Amaranth trader $30m (£18.2m) for manipulating market as authorities assemble team to examine market abuse.

Greece asks Interpol to question a London trader over an email which talked of the high chance of a Greek default.

Islamic militants are making sophisticated use of mobiles phones to spread propaganda, a study suggests.

The Japanese government announces a 4 trillion yen ($48.9bn; £29.6bn) emergency budget, after last month's earthquake and tsunami.

UK banks lose a judicial review that could have a major impact on whether more compensation has to be paid on mis-sold loan insurance.

Samsung accuses Apple of violating its patent rights, days after Apple accused it of "slavishly" copying designs of its iPad and iPhone.

Toyota production cuts will last at least until the end of the year due to a shortfall in the supply of parts, the firm says.