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$271.64
−9.48%Market closedDelayed 15 minutes · Source: ViewTrade · 5 Nov 2026, 06:30 IST · A quote does not mean the product is available to trade on your account.
In brief
Questions investors ask
Quotes run fifteen minutes behind.
1 month: −38.6% (SPY −1.6%, XLK −12.6%). 3 months: −33.4% (SPY −0.4%, XLK −5.1%). 1 year: +48.9% (SPY +13.6%, XLK +20.1%). Price change to the 4 Nov 2026 close; dividends excluded.
Daily closes, split-adjusted: CIEN, SPY and XLK · as of 4 Nov 2026
The 4 Nov 2026 close of $272.24 was 23.8% below its 50-day average ($357.47) and 32.9% below its 200-day average ($405.62). It has closed below the 200-day for 16 sessions, since 14 Oct 2026. The 50-day average crossed below the 200-day on 21 Sep 2026, 32 sessions ago.
Daily closes, split-adjusted; 50- and 200-session simple averages · as of 4 Nov 2026
Closed at $272.24 on 4 Nov 2026: 57.3% below the 52-week high of $637.51 (3 Jun 2026) and 61.8% above the low of $168.22 (21 Nov 2025).
Daily price bars, split-adjusted · as of 4 Nov 2026
4.0M shares were sold short at the 15 Oct 2026 settlement, 2.8% of the 141.8M shares outstanding; covering them would take 1.2 days of average volume. Short interest is reported twice a month, on a lag.
Exchange short-interest filing · as of 15 Oct 2026
Price return, split-adjusted
At the 4 Nov 2026 close
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.
September 4, 2025
+23.31%January 27, 2025
−21.04%December 8, 2022
+19.96%