Ciena Corporation (CIEN)

About Ciena Corporation

Ciena is a leader in high-speed optical connectivity, providing systems, components, and automation software for telecom providers and enterprises, such as data centers, to enable long-distance connectivity. The company operates through four primary business segments: networking platforms, platform software and services, Blue Planet automation software, and global services. While telecom carriers remain important customers, cloud providers and hyperscalers now drive a significant portion of the business. To meet the demands of AI data centers, customers are adopting Ciena's WaveLogic 6 platform, the first to support 1.6 terabits-per-second capacity.

As of November 3, 2026, Ciena Corporation (CIEN) stock tumbled to $284.34, down 11.34% (-$36.38) versus the previous close. On the day, shares have traded between $282.67 and $320.78. That puts CIEN in the lower third of its 52-week range of $168.22 to $637.51. Ciena Corporation operates in the telephone & telegraph apparatus space and carries a market capitalization of roughly $45.48 billion, with about 4.36 million shares changing hands.

Latest CIEN news

• Marvell and Lumentum Fell Hard. Their Supplier’s Stock Is Soaring247wallst.com· Nov 3, 8:11 AM ET
• Ciena Up 56% in a Year: Should Investors Buy the Stock Now?Yahoo Finance· Nov 3, 7:33 AM ET
• Viavi Solutions to Report Q1 Earnings: What Should Investors Do?Yahoo Finance· Nov 2, 8:13 AM ET
• Is Ciena (CIEN) Undervalued Following Strong Q3 Results And Raised Guidance?Yahoo Finance· Oct 31, 2:07 PM ET
• Ciena (CIEN) Stock May Be 43% Undervalued Following AI Networking OptimismYahoo Finance· Oct 31, 4:08 AM ET
• Is Arista Networks Stock Really Expensive?trefis.com· Oct 30, 6:18 PM ET
• Is There A Risk Hiding In Ciena Stock's Growth?trefis.com· Oct 30, 9:42 AM ET
• Ciena’s Quarterly Earnings Preview: What You Need to Knowbarchart.com· Oct 30, 8:35 AM ET

Source: Yahoo Finance RSS · Updated November 3, 2026

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• Imagine knowing on 10/19 that $CIEN's daily trend had turned red. It was $344.20 then and is down ~16% since. The weekly's been red since 08/03. See every trend at a glance: https://bullboardtrend.com/?ref=stocktwits

  @BullBoardTrend· Nov 2, 8:07 PM ET· Bearish

• Big options day in $CIEN: $4.1M in premium. Money on both sides, which usually means traders expect a move but don't agree on the direction. $SPY $QQQ Breakdown of the largest contracts here: https://globaltradersacademy.com/articles/ciena-cien-draws-4-1m-in-unusual-put-ac…

  @GlobalTradersAcademy· Nov 2, 7:01 PM ET

• $CIEN oil up = sell tech Oil down = sell tech Bond yields up = sell tech Bond yields down = sell tech Increase guidance = sell tech Iran war = sell tech Iran war peace talks = sell tech It doesn’t matter. The big computers are set to sell on everything Until the elites flip th…

  @kevie6537· Nov 2, 3:50 PM ET

• $CIEN Quick 285.01 to 288.89 flip. They really smacked the crap out of this one, 54.6% off June 2 peak

  @WAJeff· Nov 2, 3:09 PM ET

• $CIEN pack your bags, then get your luggage. We're all going for an all expense paid trip to $185 Let's go bro

  @T_L808· Nov 2, 2:08 PM ET

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