Oil traders face US civil action

Microsoft ends Yahoo buyout talks
Microsoft's boss tells the firm's annual general meeting that it is no longer looking to buy Yahoo.

Jerry Yang to quit as Yahoo boss
Jerry Yang, the co-founder of Yahoo, is to stand down as the internet portal's chief executive officer.

Chrysler calls for cash lifeline
The boss of struggling US car firm Chrysler warns it would be "very difficult" for the company to survive without government support.

Hedge fund boss backs regulation
A US hedge fund leader tells Congress he would be happy to see his industry become more transparent.

UBS boss charged over tax evasion
A senior director of Swiss bank UBS is charged by US authorities with helping US citizens commit tax evasion totalling $20bn.