In a holiday-shortened week, investors learned a nasty lesson: when the bear reveals his fangs, the results can be nasty.
Read MoreSyria! Tariffs! Mueller Investigation! Facebook under Fire! Corporate Earnings! All of these headlines have moved markets over the few weeks, leaving investors whipsawed and exhausted. If you’re keeping score, the Dow and S&P 500 are down slightly on the year (-1.5 percent and -0.7 percent, respectively), while the Russell 2000 and NASDAQ Composite are up (+0.9 percent and +3 percent, respectively).
Read MoreStocks dropped by nearly 3 percent Thursday and another 2 percent on Friday, closing out the steepest one-week percentage decline for US indexes since January 2016. The proximate cause was President Trump's announcement that the U.S. would levy 25 percent tariffs on up to $60 billion dollars worth of Chinese imports.
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