Optical stocks lead Monday's losers as Ciena falls 10.49%
As seen on the 24/7 Wall St. homepage on October 12, 2026.
The optical names took the worst of it at the close, with Ciena down 10.49% and Lumentum and Applied Optoelectronics close behind. Shopify's gain led a much tamer move on the other side of the 382-stock board.
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Ciena, Lumentum, and Applied Optoelectronics closed October 12 as the session's hardest-hit names, with Ciena dropping 10.49%. Three optical-networking stocks clustered at the bottom of the board on the same day points to sector-wide pressure.
IonQ and Lucid filled out the remainder of the loser list, each shedding more than 9%, meaning the five biggest decliners on the day all lost more than 8% of their value.
The buying side of the session was considerably quieter. Shopify led the gainers at up 5.06%, followed by Snap, Comcast, Meta, and Medtronic, gains that look modest against the scale of the optical sell-off.
For investors tracking the optical-networking space, the decline spanned Ciena, Lumentum, and Applied Optoelectronics in a single session. A move this uniform across multiple names in a niche sector often signals a shared catalyst, and the next trading day's price action will show whether buyers step in to defend these levels or the selling continues.