Former Microsoft CEO Steve Ballmer tops Bill Gates' wealth

Former Microsoft chief executive Steve Ballmer is now wealthier than Bill Gates.

Ballmer, who began his career at Microsoft as Gates' assistant, surpassed the Microsoft co-founder on the Bloomberg Billionaires Index on Monday for the first time.

According to the index, Ballmer is now the sixth-richest person in the world, with a net worth of $157.2 billion, topping Gates' $156.7 billion.

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Bloomberg noted that...