LYTE.MI is trading at €4.91, down 7.11%, as optical-sector weakness weighs on photonics holdings.
- Lumentum fell about 10% amid a Citi forecast shift and concerns around AI spending.
- Ciena dropped 9.38% at the November 4 close, adding pressure across optical-networking stocks. Weakness appears specific to optical stocks rather than the broader technology rally; available coverage does not establish a direct ETF-specific catalyst.