Semtech is trading 11.41% down at $135.97 after broad technology and semiconductor weakness intensified on August 18, 2026.
- Rising Treasury yields, higher oil prices, and renewed U.S.-Iran tensions are pressuring growth-stock valuations and risk appetite.
- The Nasdaq Composite is down 1.41%, while SOXX is down 2.78%.
- Chipmakers broadly sold off as yields reached multi-year highs.