CIEN· Ciena

Dark pool · off-exchange short volume

as of 2026-11-05

CIEN's off-exchange short-volume ratio was 31.0% on 5 Nov 2026, below its 20-day average of 47.7%. Off-exchange trading was 53% of volume over the last 20 sessions. 9 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 9 Oct 2026.

Short ratio (latest)

31.0%

20-day average

47.7%

Off-exchange share (20d)

53%

Darkpool density

big day, short ratio above trendbelow trendbubble size = how unusual ($vol z-score)

Last ~6 months. Bubbles mark days of unusually large off-exchange dollar volume (≥1.5σ vs the trailing 60 days). Daily resolution — not print-level data.

Darkpool levels ±15% of spot, since 2018-10-01

310.35

0.63B

304.91

0.94B

299.46

0.98B

294.02

1.13B

288.57

0.94B

283.13

0.75B

277.68

0.52B

272.24

0.54B

266.80

0.48B

261.35

0.49B

255.91

0.89B

250.46

1.11B

245.02

1.26B

239.57

1.70B

234.13

1.33B

Historical off-exchange $ volume at price: each day's volume spread across that day's range, summed over the full FINRA history. Heavy shelves often act as support/resistance magnets. Amber row = spot's bin.

Off-exchange short-volume ratio

short ratio (20d, right) daily off-exchange share (left)

FINRA daily TRF data, last 2 years. A persistently HIGH short ratio is mostly passive market-maker liquidity provision (commonly read as accumulation pressure) — not naively bearish.