SEMI is trading 3.5% down at $38.12 as technology and semiconductor shares faced broad selling pressure on August 18, 2026.

  • Reports linked the pullback to surging long-term bond yields, higher oil prices, and reduced risk appetite.
  • A semiconductor ETF was reported down 3.2% in premarket trading.
  • No clear SEMI-specific announcement, earnings report, or analyst action was identified; the Nasdaq was down 1.44%.