CIEN·Ciena Corporation

Realized volatility (21d)

80.1% 94th pct

Below its peak

-44.9%

vs 200-day average

-9.1%

Up days (1y)

56%

Ciena Corporation is currently running 80.1% annualised volatility over the last 21 sessions. Measured against CIEN's own 13 years of daily returns rather than a market-wide average, that is the 94th percentile — an extreme by its own standards, against a typical reading of 35.7%. The distinction matters because a number that looks calm for one stock is turbulent for another, and the absolute figure on its own tells you neither.

CIEN is trading -44.9% below its running peak. Across 12 full years on file, its median worst-drawdown-in-a-year was -27.7%, and the deepest was -49.4% in 2022. The current drawdown is already deeper than this stock's typical annual low point, which puts it in the part of its range where past recoveries began — and where past declines also continued.

Price sits -9.1% from its 200-day moving average. Against every other day in its history, that gap ranks at the 17th percentile — a narrower gap than it typically runs. Over the past year CIEN closed higher on 56% of sessions, and it is currently 4 sessions into a rising streak.

On September specifically: over 13 years of records, CIEN finished the month higher 2 of 13 times, with a median return of -3.8% and an average of -2.4%. Its strongest month historically has been December at +10.3% on average, its weakest March at -4.9%. Seasonality is a weak signal on its own — a decade is a small sample and regimes change — but it is a real distribution rather than a rule of thumb.

Overnight risk is measurable too: CIEN has opened more than 2% away from the prior close in 239 of 3,268 sessions (7.3% of the time), with the largest gaps running +8.3% and -9.5%. For anyone holding through an event, that rate is a better guide to overnight exposure than the intraday range.

Across the last 3 dated reports on file, CIEN moved an average of 4.5% in the session after earnings, closing higher 1 of those 3 times, with a median move of -2.0% and a largest of -9.9%.

All figures computed from 3,269 daily closes between 2013-09-19 and 2026-09-18, split-adjusted, recomputed daily. Percentiles are against CIEN's own 13-year history, not a peer group or index.