The cover of the January 19, 2008, edition of The Economist showed three large tandem-rotor military helicopters, each hauling a pallet full of gold bars and emblazoned with the flags of China, Singapore and Kuwait.  Credit: The Economist Above the fleet of helicopters, the headline announced the impending “invasion of the sovereign wealth funds.” This hyperbolic declaration was a reference to several sovereign wealth funds (SWFs) from Asia and the oil-rich Arabian Gulf that ha