KLA is trading 4.08% down at $175.46 after investors focused on supply constraints and higher memory costs discussed at the September 9, 2026 Citi conference.
- Management said optical components, particularly calcium fluoride, remain constrained, with lead times of 18–24 months or more.
- Memory costs represent an approximately 100-basis-point gross-margin headwind.
- Broader semiconductor weakness and firm Treasury yields are adding pressure.