Advanced Micro Devices (AMD) saw its stock fall more than 10 percent today after posting a wider-than-expected first-quarter loss that it blamed on production problems and an industry slowdown. AMD's shares were off 3-3/16 today, closing at 27-5/16. Also affecting the stock were reports that IBM may buy a stake in AMD and that CEO Jerry Sanders could step down during the next 12 months. Since last Monday, AMD's stock had been climbing every day, jumping to a recent high of around 31 on analysts' comments that the company had solved its manufacturing problems. Yesterday, however, the chipmaker reported a $55.8 million loss, compared with a profit of $12.9 million for the like quarter a year ago. The quarterly loss of 39 cents per share was below the mean estimate of a 29-cents-per-share loss predicted by Wall Street analysts, according to First Call.