Mark Zuckerberg has moved a step closer to becoming the richest person on the planet. The Facebook founder has moved up to ninth place in Bloomberg's billionaire list, overtaking Ikea founder Ingvar Kamprad. Mr Zuckerberg, 31, has a fortune of $43.1bn, a rise of $8.6bn in the year so far. Facebook's shares hit a record high of $98.39 on Tuesday as analysts prepare for what they believe will be bumper results next week.