Financial journalist and neuroeconomist Jason Zweig says don't be happy, worry.
"It is at times like these, when a rising market sweeps our spirits up with it, that investors need to evaluate their emotions and consider whether their beliefs and actions are justified," Zweig writes in The Wall Street Journal.
Since last September through this past March, he notes, officers and directors of publicly traded companies sold twice as much stock in their own companies as they bought, considerably less than the historic average of 7 to one, according to TrimTabs Investment Research.
In August, that ratio jumped to 31 to one. (more)
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