Amkor Technology is trading 5.5% down at $51.83 after management issued fourth-quarter revenue and earnings guidance significantly below Wall Street expectations.
- The weaker outlook overshadowed a stronger-than-expected third-quarter performance and extended the sharp decline that began on August 18, 2026.
- The semiconductor sector is down 4.71% as elevated bond yields, geopolitical uncertainty, and profit-taking weigh on growth-oriented chip stocks.