Daily trading records
Ciena Stock Price on August 18, 2026
Direct answer
Ciena closed at $405.54 on August 18, 2026.
The open was $421.585, the high was $427.74 and the low was $391.77.
Volume was 3,052,262. The change from the prior close was -$39.64 (-8.90%).
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Review Ciena's price trend and period performance.
The chart connects verified session closes from May 21, 2026 through August 18, 2026.
Period performance is calculated from verified trading sessions.
5-session performance
+4.65%
From the August 11, 2026 close of $387.53 to $405.54 on August 18, 2026.
20-session performance
-0.78%
From the July 21, 2026 close of $408.73 to $405.54 on August 18, 2026.
60-session performance
-30.94%
From the May 21, 2026 close of $587.23 to $405.54 on August 18, 2026.
Verified data
- Open
- $421.585
- High
- $427.74
- Low
- $391.77
- Close
- $405.54
- Volume
- 3,052,262
- Prior-close change
- -$39.64 (-8.90%)
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Read the frequently asked questions.
What was Ciena's closing price on August 18, 2026?
Ciena closed at $405.54 on August 18, 2026.
What were Ciena's open, high and low on August 18, 2026?
The open was $421.585, the high was $427.74 and the low was $391.77.
How much did Ciena change from the prior close on August 18, 2026?
The change from the prior close was -$39.64 (-8.90%).
What was Ciena's volume on August 18, 2026?
Trading volume was 3,052,262 shares.
What is the source for Ciena's daily prices?
Daily aggregate prices are provided by Polygon.