Amazon founder Jeff Bezos has entered more rarefied air, having leapfrogged billionaires Amancio Ortega and Warren Buffett to become the second wealthiest person in the world. Bezos -- CEO of the e-commerce retailer and cloud services provider -- last week enjoyed a jump of $1.5 billion to $75.6 billion net worth, after his company announced a deal to acquire Souq.com.

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