ACGL· Arch Capital Group

Dark pool · off-exchange short volume

Dark pool as of 2026-11-04 · latest session 2026-11-05

ACGL's off-exchange short-volume ratio was 53.8% on 4 Nov 2026, below its 20-day average of 59.6%. Off-exchange trading was 34% of volume over the last 20 sessions. 13 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 16 Sep 2026.

Short ratio (latest)

53.8%

20-day average

59.6%

Off-exchange share (20d)

34%

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

109.95

0.17B

107.79

0.98B

105.63

0.88B

103.48

1.13B

101.32

1.99B

99.17

3.48B

97.01

5.54B

94.86

6.15B

92.70

7.13B

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.