US-listed optical-communications stocks opened lower; Ciena fell nearly 16% after reporting earnings, POET dropped about 7%, Lumentum fell ~6%, Marvell and Nokia were off more than 5%, and Corning declined over 4%.

2026-06-04

US-listed optical-communications stocks opened lower; Ciena fell nearly 16% after reporting earnings, POET dropped about 7%, Lumentum fell ~6%, Marvell and Nokia were off more than 5%, and Corning declined over 4%.