CNBC Tech
Corning tumbles 18% after earnings, leading rout in optical stocks
Tuesday, July 28, 2026
Corning's stock fell 18 percent following the release of its earnings report. Shares of Marvell Technology, Lumentum Holdings, AXT Inc., and Coherent Corporation also declined in double-digit percentages on the same trading day.
Original reporting: https://www.cnbc.com/2026/07/28/corning-glw-stock-optical-ai.html