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Biggest moves on record

Every trading day we hold, as a bar. The five biggest are marked.

  1. 1+13.8%6 Oct 2026Moderate
  2. 2−13.7%4 Jun 2026Max
  3. 3−13.1%8 Jan 2026High
  4. 4−12.9%5 Mar 2026Very High
  5. 5+12.6%30 Jul 2026Moderate

Every day, by size of move

265 trading days, 2025–2026. One square is one day.

  • Max41.5%
  • Very High83.0%
  • High51.9%
  • Moderate207.5%
  • Low8732.8%
  • Very Low14153.2%

Biggest moves on record

Every week we hold, as a bar. The five biggest are marked.

  1. 1−26.0%Week of12 Oct 2026Max
  2. 2+24.2%Week of1 Sep 2025Max
  3. 3+21.9%Week of9 Dec 2024Max
  4. 4+20.1%Week of6 Dec 2021High
  5. 5−18.7%Week of13 Jul 2026Max

Every week, by size of move

301 weeks, 2021–2026. One square is one week.

  • Max72.3%
  • Very High51.7%
  • High62.0%
  • Moderate113.7%
  • Low9330.9%
  • Very Low17959.5%

Biggest moves on record

Every month we hold, as a bar. The five biggest are marked.

  1. 1+55.0%Sep 2025High
  2. 2+53.6%Apr 2009Very High
  3. 3+44.9%Mar 2009High
  4. 4−42.0%Sep 2008High
  5. 5+39.1%Dec 2010Moderate

Every month, by size of move

252 months, 2005–2026. One square is one month.

  • Max20.8%
  • Very High20.8%
  • High52.0%
  • Moderate62.4%
  • Low8232.5%
  • Very Low15561.5%

Monthly performance

Over the past 22 years, CIEN rose most often in November (15 of 21) and fell most often in September (13 of 22).

How it reacted to its last results

ReportedResultOn the day
3 Sep 2026 Beat$2.11 vs $1.73 expected −10.4%
4 Jun 2026 Beat$1.64 vs $1.46 expected −13.7%
5 Mar 2026 Beat$1.35 vs $1.17 expected −12.9%
11 Dec 2025 Beat$0.91 vs $0.77 expected +9.2%

Beat or missed means profit per share came in above or below what experts expected. The price move is for the first trading day the results could move.

Compared with its neighbours

On a normal day, CIEN moves about 3.1% up or down. That is livelier than 9 in 10 shares we follow.

Industry · Technology

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In the news

Recent headlines about Ciena Corp., from the outlets that wrote them.

  1. 01Simply Wall St9 hours agoCiena Stock Eyes Earnings Test After AI Networking Fund Launch
  2. 02Yahoo Finance10 hours agoCiena (CIEN) Stock May Be 43% Undervalued Following AI Networking Optimism
  3. 03GuruFocus18 hours agoCiena Corp (CIEN) Shares Fall 8.2% -- GF Value Says Still Overva
  4. 04Benzinga1 day ago$100 Invested In Ciena 5 Years Ago Would Be Worth This Much Today
  5. 05Trefis1 day agoIs There A Risk Hiding In Ciena Stock’s Growth?
  6. 06Yahoo Finance1 day agoCiena’s Quarterly Earnings Preview: What You Need to Know