MKS Instruments is trading at $205.11, down 5.09%, in pre-market amid semiconductor-sector weakness.
- SOXX was down 3.64% pre-market, while broad-market futures were also lower.
- Lam Research fell sharply after its October 21 results as investors focused on supply constraints and an expected drop in China revenue.
- No fresh company-specific announcement was found for October 22; the Ophir Optics sale to TTM was announced October 19 and is earlier context, not a clear trigger.