Alexandra Andresen was named as the youngest billionaire in the world this month with a $1.2 billion (£862 million) fortune after she was required to declare her finances to Norway's taxman when she hit adulthood. Her fortune comes from her father Johan Andresen who transferred 42% of the stock in Ferd, the family's centuries-old private-investment company, to her in 2007. Her sister Katharina, who at 20 is the second-youngest billionaire in the world, is also worth $1.2 billion after also securing a 42% stake in the company from her father. But following the announcement the teenager is a billionaire — some parts of ... (full story)