As the U.S. powers the global economic expansion in its fifth year, the world's rich are counting on American companies to help increase their fortunes.
At least a dozen family offices administering fortunes made in Europe, Asia and South America have opened U.S. outposts in the past two years or are making direct investments in corporations from Silicon Valley to the East Coast. Their view is that the Federal Reserve's aggressive monetary easing, a shale oil boom that's lowered energy costs and improving corporate balance sheets give the world's largest economy an edge over other regions.
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