Ciena (CIEN) Stock Soars on Q4 2025 Earnings Beat, AI Demand and Bullish 2026 Guidance
Ciena Corporation (NYSE: CIEN) jumped sharply on Thursday, December 11, 2025, after posting a strong fiscal fourth‑quarter 2025 earnings report and issuing revenue guidance for 2026 that came in well ahead of Wall Street expectations. The move caps a remarkable