AI Infrastructure Beneficiaries See Market Cap Surge of 3.6 Trillion Won in One Day

Ciena Corp. (CIEN) shares jumped 6.63% on the New York Stock Exchange on the 2nd, closing at $268.49 with trading volume of about 1.48 million shares—well above its average. Its market capitalization swelled to approximately $37.8 billion (roughly KRW 51 trillion), marking a single-day increase of about $2.68 billion (KRW 3.6 trillion).

In today’s session, amid a broad rebound in technology stocks, Ciena overcame early weakness to climb above the $270 level intraday. Investors are focusing on its early-March quarterly earnings release as the next key catalyst. Recently, the company secured multiple contracts—including with telecom operators in Serbia and Bosnia and Herzegovina, as well as a Pacific subsea cable operator—to build 800G optical transmission networks optimized for AI, reinforcing expectations that it will benefit from the AI data-center infrastructure boom.

Headquartered in Maryland, U.S., Ciena is an optical-transport and communications-equipment provider that supplies high-speed optical network solutions to hyperscale and cloud service providers. It’s regarded as a core infrastructure partner for AI data centers and network expansions. After reporting fiscal-2025 revenue of $4.77 billion with double-digit profit growth, Ciena issued fiscal-2026 revenue guidance of up to $6.1 billion, underpinning high-growth expectations that have fueled its recent share rally.