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NYSE · Technology · Historical Data

Ciena Corporation (CIEN) Historical Prices & Returns

Daily CIEN open, high, low, close, volume rows through the latest completed session. Returns, range, and realised volatility exclude an unfinished bar while the cash session is open.

Section freshness

Research as of Sep 29, 5:01 AM EDT · Prices as of Sep 28, 4:00 PM EDT · Fundamentals checked Sep 29, 8:37 AM EDT · Statements Aug 1, 2026

Available-period price return
+148.66%
2025-09-24 → 2026-09-28 · change in displayed closes
Range high
$637.51
Range low
$133.67
Realised vol (annualised)
73%
σ of daily log returns × √252

Range context

Mid-range.

The latest quote is 41% of the way from the reported 52-week low ($143.19) to the high ($637.51). The completed-session price return is +148.66% from Sep 24, 2025 to Sep 28, 2026.

Last 30 sessions

DateOpenHighLowCloseReturnVolume
$352.42$356.99$339.33$344.19-3.56%1,830,200
$363.00$366.43$355.01$356.91-0.42%1,616,900
$350.40$363.46$346.56$358.43+0.71%1,418,900
$368.64$369.00$351.53$355.91-3.43%1,851,600
$364.31$376.74$363.14$368.56+0.71%2,404,800
$365.05$367.62$356.46$365.96+4.92%2,886,500
$355.87$358.00$338.25$348.80+1.32%4,863,900
$350.60$375.70$341.93$344.25+1.10%3,764,100
$350.09$375.20$327.50$340.50+1.85%3,947,500
$324.44$335.97$320.50$334.33+4.60%2,796,700
$326.98$332.32$318.43$319.64-8.55%2,210,600
$336.92$355.19$336.44$349.54+4.48%1,979,900
$333.00$348.40$328.36$334.56-1.02%2,548,400
$341.90$348.00$337.16$338.00-0.96%1,812,600
$327.42$349.78$325.69$341.29+6.32%3,223,600
$321.67$328.85$315.73$321.00+1.12%3,340,000
$354.49$358.76$311.60$317.46-10.36%7,535,400
$357.25$359.60$348.86$354.16-1.71%2,870,300
$376.89$381.60$356.40$360.33-5.87%2,259,300
$378.44$382.94$370.77$382.80+1.15%1,826,500
$400.42$400.50$376.64$378.44-5.35%1,317,800
$411.53$418.72$395.50$399.85-1.03%1,207,100
$387.23$406.44$387.23$404.03+4.22%1,189,500
$386.33$388.73$378.94$387.66+4.22%1,191,100
$386.26$386.26$362.48$371.95-6.02%1,777,300
$396.00$403.72$382.75$395.79+0.84%1,234,900
$400.35$404.35$389.10$392.48-1.75%1,453,100
$415.50$415.50$392.67$399.47-1.50%1,771,900
$421.59$427.74$391.77$405.54-8.90%3,052,300
$438.38$458.00$427.45$445.18+3.83%2,494,700

Showing 30 of 254 completed sessions.

Download all 254 sessions · CSV

Yahoo Finance · Provider-reported; adjustment basis unspecified. Change between displayed closing observations; dividend treatment follows the stated adjustment basis.

Frequently asked

Common questions.

What CIEN historical data does TECHi show?

TECHi shows dated Ciena Corporation closing prices, with high, low, volume, dividend, and split columns whenever those values are available for the session.

How does TECHi calculate CIEN returns and volatility?

Returns use the displayed closing prices. Realised volatility is calculated only when enough dated observations exist, using the annualised standard deviation of daily log returns.

How current is the CIEN price history?

The CIEN table runs through the most recent completed trading session. While the cash session is open, today's unfinished bar is shown separately and is left out of returns, volatility, and the daily table.

How much CIEN history is included?

The table and summary use only the sessions delivered in the displayed series; TECHi does not infer older prices or fill missing dates.

All data sources

Search the dated figures used for this view. Each entry identifies its units, reporting period and calculation status.

How to use this page

Use this to put the current move into long-range context.

Best for Drawdowns, period returns, volatility clusters, and dated price ranges.

Weak when Recent corporate actions or sparse observations distort the displayed baseline.

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Regular hours: 9:30 AM–4:00 PM America/New_York

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Exchange calendar includes scheduled holidays and early closes. Extended-session prices appear separately only when supplied by the quote source.