Amazon reported fourth quarter results Thursday afternoon, and after a run up before the report, shares fell more than 4 percent in the first 30 minutes of trading on Friday. The market’s sour reaction was based on tepid guidance: The company currently expects Q1 sales growth of between only 10 percent and 18 percent compared to Q1 2018. As well, cfo Brian Olsavsky told investors on yesterday’s conference call that investment was likely to increase compared to last year. Fourth quarter sales were $72.4 billion, a 20 percent increase over the same period last year, and net income increased to […]