Independent: Facebook has become one of the highest-valued companies in the world after a stock surge saw it leapfrog General Electric to join the ranks of the top 10 companies on the S&P stock market index. And quietly, in the process, founder Mark Zuckerberg has become the ninth richest person in the world. Zuckerberg leap-frogged Ingvar Kamprad, the founder of Ikea and Sweden’s richest man, and his steady ascent of Bloomberg’s list of the world’s richest continues apace. Just a few weeks ago, he slipped past four members of the Walton family to become the world’s 11th richest man.