Why Ciena Stock More Than Doubled in the First Half of 2026
Ciena's optical networking systems became essential AI infrastructure in 2026. But the rally came with a hefty dose of valuation risk.
Overview
Shares of Ciena (NYSE: CIEN) rose 109.8% in the first half of 2026, according to data from S&P Global Market Intelligence. The networking equipment veteran more than doubled due to accelerating demand for optical networking infrastructure tied to artificial intelligence workloads.
The rally peaked in late May before a 21.8% pullback in June. For context, the S&P 500 (SNPINDEX: ^GSPC) gained 12.3% over the same period, and the Nasdaq-100 rose 15.7%.
Details
The stock also outperformed other networking heavyweights. For instance, Cisco Systems (NASDAQ: CSCO) gained 52.5% in the first half while Extreme Networks (NASDAQ: EXTR) stopped just short of doubling with a 94.4% rise.
Source
Originally published at www.fool.com.