Taiwan Semiconductor is trading 4.56% down now at $47.50 as semiconductor stocks sell off broadly on August 18, 2026.

  • Rising global bond yields are pressuring high-growth technology valuations; elevated oil prices and stalled U.S.-Iran diplomacy are worsening inflation and risk-off concerns.
  • The Philadelphia Semiconductor Index is down 3.7%, while SOXX is down 4.71%.
  • No fresh company-specific negative catalyst was identified.