Tech stocks were lower late Thursday afternoon, with the State Street Technology Select Sector SPDR ETF (XLK) falling 1.5% and the State Street SPDR S&P Semiconductor ETF (XSD) dropping 2.4%.
The Philadelphia Semiconductor index was down 1.6%.
In corporate news, STMicroelectronics (STM) shares tumbled past 18% after its Q3 revenue outlook fell short of analysts' consensus.