Ciena

CIEN · United States

Ciena traded $629.5M on 23 Oct 2026, 0.5× its 20-session average. Sector: AI Systems, Networking & Optics.

504 trading days of history, to 2026-10-23 · all values converted to USD

Last close

$320.26

23 Oct

1-day change

-0.74%

vs previous close

Market cap

$45.4B

as of 23 Oct

Turnover

1.4%

of market cap traded

Dollar volume

$629.5M

as of 23 Oct

vs prior 20 sessions

0.5×

as of 23 Oct

Share of market volume

0.16%

as of 23 Oct

Volatility

68.1%

annualised

Infinity volume insights

since 14 April 2025

Every session our rules flagged for this company since 14 April 2025: 21. Those marked “In the feed” were published in the daily feed at the time; the rest are computed with the rules in use now. The feed shows a few a day across every market, so most never appear there. We began tracking this company on 28 September 2026; findings before then are marked “Before we tracked it”: it traded that way, and we were not yet watching.

2026-10-08
Ciena traded above 1.5× its average dollar volume for a third straight session
The three sessions: 3.1×, 1.5×, 1.5×. $1.6B against a 20-day average of $1.0B, on a falling price (-4.6%).

The latest is shown; the other 20 open with the full page.

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Volume by window

	Dollar volume	vs prior 20 sessions
Last session	$630M	0.5×
Week	For members · Sign in
Month

Sessions to 23 Oct.

Infinity sector: AI Systems, Networking & OpticsBased on 249 companies, 79.2% of the S&P 500's trading.

Price and dollar volume

Bars coloured by direction

The last three months, one point a week (the week's last close and its total dollar volume).

How these are measured

Turnover: — dollar volume over market cap; how hard this name is traded relative to its size.
Vs prior 20 sessions: — above 1 means heavier trading than in the 20 sessions before it.
Share of market volume: — of the 250 names tracked in United States, not the whole market.
Volatility: — from daily returns over the held history. Indicative, not a risk model.
Market cap: — the latest session's close × shares outstanding, in USD. Each day in the history has its own, from that day's close; the share count is refreshed monthly.

Prices and volume via the daily pipeline, converted to USD.

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