US-listed optical communications stocks rose in pre-market trading, with Marvell Technology (MRVL.O) up about 6% and Corning (GLW.N) up 4.6%.

2026-07-21

US-listed optical communications stocks rose in pre-market trading, with Marvell Technology (MRVL.O) up about 6% and Corning (GLW.N) up 4.6%.