Daily trading records
Ciena Stock Price on August 21, 2026
Direct answer
Ciena closed at $395.79 on August 21, 2026.
The open was $396.00, the high was $403.72 and the low was $382.745.
Volume was 1,235,392. The change from the prior close was +$3.31 (+0.84%).
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Review Ciena's price trend and period performance.
The chart connects verified session closes from May 27, 2026 through August 21, 2026.
Period performance is calculated from verified trading sessions.
5-session performance
-7.69%
From the August 14, 2026 close of $428.77 to $395.79 on August 21, 2026.
20-session performance
+1.24%
From the July 24, 2026 close of $390.96 to $395.79 on August 21, 2026.
60-session performance
-32.00%
From the May 27, 2026 close of $582.08 to $395.79 on August 21, 2026.
Verified data
- Open
- $396.00
- High
- $403.72
- Low
- $382.745
- Close
- $395.79
- Volume
- 1,235,392
- Prior-close change
- +$3.31 (+0.84%)
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Read the frequently asked questions.
What was Ciena's closing price on August 21, 2026?
Ciena closed at $395.79 on August 21, 2026.
What were Ciena's open, high and low on August 21, 2026?
The open was $396.00, the high was $403.72 and the low was $382.745.
How much did Ciena change from the prior close on August 21, 2026?
The change from the prior close was +$3.31 (+0.84%).
What was Ciena's volume on August 21, 2026?
Trading volume was 1,235,392 shares.
What is the source for Ciena's daily prices?
Daily aggregate prices are provided by Polygon.