Amazon.com, Inc. (AMZN) Investors Not Content With Share Jump Of 20%

When Amazon.com, Inc. (NASDAQ:AMZN) reports second-quarter earnings after the closing bell Thursday, investors will be looking for an improvement in the company’s narrow profit margins. Analysts expect the Seattle-based online retailer to report $15.74 billion in sales, which would represent a 23% jump from a year earlier. Net income is likely to be $28.3 million, a four-fold increase from last year, according to analysts’ estimates. Despite operating margins that have been less than 1% in recent quarters, Amazon.com, Inc. (NASDAQ:AMZN) shares have jumped 20% this year. Amazon 2Q13 expectations Aaron Kessler of Raymond James estimates 2Q net sales of $15.81 billion, slightly above the…