Shares of Advanced Micro Devices Inc. hiked up 0.7% in premarket trading Thursday, to buck the selloffs in its semiconductor peers and the broader stock market, after BMO Capital analyst Ambrish Srivastava turned bullish on the chip maker. The stock's gains come as the VanEck Semiconductor ETF slumped 0.6%, with 19 of 25 components losing ground, and as futures for the S&P 500 slid 1.2%.