CSGP· CoStar Group

Dark pool · off-exchange short volume

as of 2026-11-05

CSGP's off-exchange short-volume ratio was 21.3% on 5 Nov 2026, below its 20-day average of 34.2%. Off-exchange trading was 37% of volume over the last 20 sessions. 8 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 28 Oct 2026.

Short ratio (latest)

21.3%

20-day average

34.2%

Off-exchange share (20d)

37%

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

37.14

0.27B

36.49

0.27B

35.84

0.24B

35.19

0.33B

34.53

0.47B

33.88

0.70B

33.23

0.95B

32.58

1.32B

31.93

0.98B

31.28

0.52B

30.63

0.66B

29.97

1.12B

29.32

1.13B

28.67

0.72B

28.02

0.52B

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.