The company is highly popular among investors thanks to its solid position as a supplier of hardware that underpins AI systems.In the final month of 2025, investors were clearly seeing the value of Ciena (CIEN +2.38%) stock. Shares of the optical networking equipment specialist raced nearly 15% higher over the course of December, which shouldn't be surprising given its excellent fourth quarter of fiscal 2025 results, and the wave of analyst price target raises that followed the earnings release.Double-digit ...