A strong update might finally get the stock moving.Amazon (AMZN +2.62%) stock trailed the S&P 500 last year despite robust growth. This could be an excellent opportunity for investors, but only if Amazon stock is likely to recover. Let's see what might happen when it reports fourth-quarter and full-year earnings on Feb. 5, and whether or not it make sense to buy the stock now. Progress in AIThe main thing that's going to be on investors' minds when hearing about the fourth quarter is artificial intelligence ...