From Forbes: ... Kingdom Holding shares began what seemed a miraculous rebound in early 2010, rising 57% in the ten weeks prior to the February date that FORBES used to lock in values for that year’s Billionaires list, as Citigroup shares fell about 20%. The prince’s ranking on the FORBES billionaires list surged in lockstep to 19th ($19.4 billion). In 2011 the pattern repeated. In the ten weeks before FORBES locked down its list, Kingdom Holding shares rose 31% while the Saudi index was up 3% and the S&P 500 was up 9% over that same period. (Prince Alwaleed finished at No. 26 in the world that year, with an estimated net worth of $19.6 billion.) It happened yet again in 2012, when Kingdom shares climbed 56% while the Saudi market was up just 11%, and the S&P 500 was up 9%. (This time Alwaleed was No. 29, with an $18 billion valuation, after FORBES discounted his claims on many of his non-Kingdom Holding assets.)