Federal Reserve Board Chairman Ben Bernanke leaves after he testified at a hearing before the Joint Economic Committee on May 22, 2013 in Washington, DC.
Federal Reserve Board Chairman Ben Bernanke leaves after he testified at a hearing before the Joint Economic Committee on May 22, 2013 in Washington, DC. - 
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Marketplace

As much as marijuana initiatives are an experiment in drug legalization, they are also a business experiment. How do you set up an entirely new commercial marketplace worth billions?

In Louisiana today, the Army Corps of Engineers is holding a ribbon cutting to announce the completion of the levee system that covers the West Bank of the Mississippi. It's just one part of the $14.5 billion overhaul of the region's flood protection system.

And three letters could dominate market psychology in the next few days: F-E-D.

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Follow David Brancaccio at @DavidBrancaccio