Intel's (INTC.O) weaker-than-expected outlook dragged down semiconductor stocks in pre-market trading. AMD (AMD.O) fell 6.5%, Nvidia (NVDA.O) fell 2.5%, Micron Technology (MU.O) fell 3.7%, Arm (ARM.O) fell 7.5%, Qualcomm (QCOM.O) fell 3.9%, Broadcom (AVGO.O) fell 3.5%, and the iShares Semiconductor ETF fell 5.6%.