Teradyne is trading 5.68% down at $377.56 as investors rotate out of high-multiple semiconductor and AI-linked stocks.

  • The broader semiconductor sector is down 2.50%.
  • Elevated Treasury yields and oil prices are pressuring growth-stock valuations.
  • No new company-specific announcement was identified for August 19, 2026; the move appears to continue the August 18 risk-off selloff linked to stalled U.S.–Iran negotiations, higher oil prices, and rising Treasury yields.