‘Wireless Penetration’

“America Movil is no longer the growth story that it has been, given the increase in Latin American wireless penetration over the last five years,” said Chris King, an analyst at Stifel Nicolaus & Co. in Baltimore, Maryland. “It continues to generate a very high amount of cash flow and has the best set of telecom assets across Latin America.”

According to King, one of Slim’s biggest challenges will be dealing with regulation in Mexico and Colombia designed to punish or even-out the market share between America Movil and its competitors. Of the 14 analysts who cover the stock, 71 percent have a buy rating on the company, with an average target price of 19.15 pesos per share, according to data compiled by Bloomberg.

Higher Taxes

U.S. software mogul Bill Gates, 57, ranks second on the list, trailing Slim by $12.5 billion. The Microsoft co-founder added $7 billion to his net worth as shares of the Redmond, Washington-based company rose 2.9 percent. Microsoft stock accounts for less than 20 percent of the billionaire’s fortune.

Warren Buffett, 82, lost his title as the world’s third- richest man to Ortega on August 6. The Berkshire Hathaway chairman gained $5.1 billion during the year, even after donating 22.3 million Berkshire Class B shares in July to charity. The billionaire, who has pledged to give away most of his fortune, spent much of the year pressing for higher taxes on the wealthy.

“On incomes of over $1 million, the excess $1 million should have a minimum tax of 30 percent. And then over $10 million, 35 percent,” Buffett said in an interview with Charlie Rose in November. “Tax law should be progressive. And I think that when people make $15 million or $20 million or $200 million and pay a 10 percent rate, something should be done about it.”

IKEA founder Ingvar Kamprad, 86, is the world’s fifth- richest person with a $42.9 billion fortune. The complex ownership structure behind IKEA, the world’s largest furniture retailer, became more transparent in August after IKEA’s franchisor published its financial performance publicly for the first time. His net worth rose 16.6 percent in 2012.

‘Delivering Results’

Brazil’s Eike Batista, 56, was the year’s biggest loser by dollars, falling $10.1 billion. The commodities maven, who vowed a year ago that he’d become the world’s wealthiest man by 2015, sold a 5.63 percent stake in his EBX Group Co. in March to Abu Dhabi’s Mubadala Development Co.