Growth concerns dog Amazon as it shores up digital beachhead

By Alistair Barr and Ben Berkowitz SAN FRANCISCO/NEW YORK (Reuters) - Amazon.com Inc's stock sank 6 percent on Friday as a poor financial outlook revived concerns about whether the company can sustain its torrid pace of expansion while profitability improves. The world's largest Internet retailer on Thursday reported its highest gross profit margins in a decade as years of spending on high-margin businesses, from digital media to cloud services, began to pay off. ...

via Tech News Headlines - Yahoo! News http://news.yahoo.com/growth-concerns-dog-amazon-shores-digital-beachhead-045517343.html