Ciena is trading 4.2% down at $383.69 on October 14, 2026, amid continued pressure on AI optical and networking stocks. - Concerns about AI infrastructure financing and profit-taking after a sharp run-up are weighing on the group. - The earlier decline was broad-based, with optical-networking peers also lower; no company announcement, earnings release, or analyst action triggered that selloff. - The broader market is also lower in the supplied snapshot, but no fresh company-specific catalyst is identified.