Shares of Advanced Micro Devices (Nasdaq: AMD US) and Nvidia (Nasdaq: NVDA US) pulled back Thursday after they rocketed a day earlier by latching on to positive research from Wall Street analysts. AMD stock moved back into buy range. On Wednesday, AMD and NVDA jumped as KeyBanc Capital Markets analyst John Vinh said in a note to clients that demand for cloud computing services was strong, a positive for both companies. In addition, Deutsche Bank analyst Ross Seymore on Wednesday raised his price target on AMD stock to 120, from 113, but kept a rating of hold.