Amazon reported fourth quarter sales after the close of the market on Thursday, with revenues growing 22 percent to $35.7 billion, and net income of $482 million in the fourth quarter, or $1.00 per diluted share. While those sound like strong results (record results, even), analysts were expecting slightly higher sales ($35.98 billion) and much stronger earnings of $1.58 per share, so the stock is down — falling about 9 percent first thing Friday after having risen on Thursday ahead of the earnings announcement. The AWS unit generated $687 million in operating income (while the entire company had $1.1 billion of operating income in […]