Mark Zuckerberg shoves Bezos aside for 4th-richest ranking

Mark Zuckerberg just got promoted: he's now the fourth-richest

person in the world.

Zuckerberg, propelled by Facebook (FB, Tech30)'s stock performance, shoved Amazon (AMZN,Tech30) CEO Jeff Bezos aside on Tuesday to claim the fourth highest ranking on the Bloomberg Billionaires Index.Facebook founder Zuckerberg, a hoodie-wearing 31-year-old and arguably the most effective CEO in America, was sitting on a fortune worth $50 billion by the close of trading Tuesday, according to Bloomberg.His personal wealth has been riding high ever since January 28, when Facebook reported sales and profits that trounced expectations.Last week, the boost in Facebook's stock price pushed him past the each of the Koch brothers, the conservative political kingmakers. And his wealth has been climbing ever since.

Facebook founder Mark Zuckerberg is now the fourth-richest person in the world, shoving aside Amazon CEO Jeff Bezos.

Microsoft (MSFT, Tech30) founder and philanthropist Bill Gates remains the world's richest person, with a net worth of $78.7 billion. Zara fashionista Amancio Ortega of Spain is number two, with $69.3 billion, and Wall Street wizard Warren Buffett is third, with $59.6 billion.