Year in Business: Facebook, Knight Take Nasty Falls

Dec. 27 (Bloomberg) -- Bloomberg News reviews the biggest business stories of 2012. (Source: Bloomberg)
Growth Spurt in Smart-Beta ETFs
11:10 - Tom Dorsey and Eric Balchunas discuss the funds that are run by robots now account for $400B. They speak with Alix Steel on "Street Smart." (Source: Bloomberg)
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