The Three Must-Own Currencies of 2012

If 2011 taught us one thing, it's that currency investing can be a dangerous business. For instance, the euro - the simplest of hedges against a declining dollar and the U.S. Federal Reserve's expansive monetary policy - has run into difficulties, losing billions for even the most sophisticated Wall Street banks. But that's not all. The Brazilian real, which was one of the best performing currencies of 2010, has dropped back sharply in 2011. Still, if you harness the lessons of 2011,

currency investing