Amazon.com (AMZN) was a top stock of 2015, gaining as much as 121% as sales and profits rebounded. But you probably wouldn’t have believed it the way the year started for the e-commerce giant. On Jan. 1, Amazon had a dismal Composite Rating of 16, meaning that it trailed 84% of stocks tracked by IBD on a wide range of fundamental criteria. Its Earnings Per Share Rating was just 2.