Ferdinand Piech, the chairman of VW, Europe's biggest carmaker, resigns after a power struggle with his chief executive.
HSBC says it is considering whether to move its headquarters out of the UK, following "regulatory and structural reforms" in the banking industry.
Amazon says its web services business generated sales of $1.57bn in the first quarter of the year and is profitable.
Will payday lenders survive a tougher regime?
Petrobras and Brazil's oil bonanza
Why supermarkets are wondering what to sell
The start-ups that want your electronic junk
Working for Man Utd's secretive owners
How one Brazilian company is thriving abroad
Leaving Britain would be a costly business for Europe’s biggest bank and a significant blow to the prestige of the City.