US Stock Market Move | "Concept of optical communication widely declines, POET Technologies (POET.US) drops by nearly 45%."

On Monday, the concept of optical communication generally fell, with POET Technologies (POET.US) dropping by nearly 45%, Applied Optoelectronics (AAOI.US) falling by 9%, Credo Technology (CRDO.US) dropping by over 8%, Marvell Technology, Inc. (MRVL.US) falling by almost 6%, Lumentum (LITE.US) dropping by over 4%, and Ciena (CIEN.US) falling by over 2%. In terms of news, POET Technologies announced that the company has canceled all purchase orders from Celestial AI, including the initial batch of production unit orders disclosed in a news release on April 25, 2023. Marvell Semiconductor Inc., which acquired Celestial AI, sent a written cancellation notice to the company on April 23, 2026. Marvell stated that the reason for canceling the orders was due to the company violating confidentiality obligations by disclosing information related to the purchase orders and shipment information.