YOFC's stock plunged 5.18% during intraday trading on Wednesday, extending a prolonged selloff in the optical communication sector.

The decline is driven by multiple headwinds including accelerating capacity expansion in the fiber optic industry, which could intensify competition and pressure profit margins for incumbent players like YOFC. Market concerns have also been raised by Corning's new glass bridge technology, which may impact long-term demand for midstream fiber optic components. Additionally, rumors of manufacturing difficulties with Nvidia's next-generation AI server components have further dampened sentiment across the broader tech sector, dragging down related stocks.