Coherent shares were sliding during the regular session as part of a broader retreat across the optics and photonics sector. Despite positive industry research from Citi regarding an 11 billion dollar switching forecast, the stock faced downward pressure alongside peers like Ciena, which fell 3.6 percent, and Corning, which dropped 3.3 percent. This sector-wide pullback overshadowed the company's ongoing role as a strategic partner in Nvidia's AI infrastructure, as investors rotated away from hardware and equipment stocks during the trading day.