COHH is trading 4.9% down in after-hours trading on July 28, 2026, extending steep losses from the regular session amid a global semiconductor sell-off.
- The decline is driven by mounting concerns over heavy AI infrastructure spending and persistent weakness across the broader semiconductor sector.
- New Chinese competition in advanced chipmaking tools is adding pressure to Coherent Corp. (COHR) and its linked leveraged products.
- The move reflects a broader market retreat from AI-related equities as investors reassess sector valuations.