Why Is Corning (GLW) Stock Price Up 5.89% Today, Sep 21? Next-Gen AI Optical Breakthrough Sparks Tech Hardware Rebound

Corning shares rose 5.89% after a Qualcomm–Lumentum–Corning ECOC 2026 demo highlighted high-density optical interconnects for AI systems, reinforcing Corning's positioning in data-center fiber and fiber-to-chip connectivity. The move was amplified by a broad tech risk-on session (Nasdaq +2.3%, semis strong). Near term, attention shifts to follow-through above key moving averages and whether showcased products convert into orders amid dilution sensitivity from the equity program.