BERNSTEIN: Amazon could disappoint in 2018 (AMZN)

Amazon could underperform its retail peers, Bernstein said in a note listing possible 2018 surprises.
It’s a heavily owned stock, with an expensive valuation, which could impact its ability to outperform.Amazon had a stellar 2017. The stock rose 55% during the year, fueled by ever-increasing earnings and the high-profile buyout of Whole Foods.
But such a great year could be setting Amazon up for a less-than-stellar 2018, Bernstein warns.
"In 2017, most retailers felt the pain of Amazon&rsq