How do I evaluate the credibility and relative bias of an economic article?

I feel more at home reading reviews of CPU microarchitectures.

http://www.moneynews.com/MKTNews/billionaires-dump-economist-stock/2012/08/29/id/450265 "Billionaires Dumping Stocks, Economist Knows Why"

Is this a mere linkbait, or something worth researching deeper?