AMD was up 6% before the market opened, but ended the day up just 1%, with its stock price around 480. Data center revenue was $8.5 billion for the quarter, double year over year. Fourth-quarter guidance of $17 billion was also above expectations, while the 55% gross margin came in a few tenths of a percentage point below expectations. The earnings report wasn't bad, but the stock couldn't hold its gains. Those who chased the rally are probably kicking themselves right now.