Ciena is trading 4.15% up at $443.60 as of 9:40 a.m. ET on October 9, 2026, amid a broader technology recovery after Thursday’s AI-related selloff. - No clear company-specific announcement or catalyst for the rebound was found in available coverage. - Major U.S. indexes were higher; reporting described a premarket rebound but did not establish a direct company-specific cause.