CSGP· CoStar Group
Dark pool · off-exchange short volume
Short ratio (latest)
51.0%
20-day average
50.3%
Off-exchange share (20d)
38%
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
34.72
0.33B
34.12
0.48B
33.51
0.68B
32.90
0.89B
32.29
1.13B
31.68
0.51B
31.07
0.29B
30.46
0.58B
29.85
0.88B
29.24
0.76B
28.63
0.48B
28.02
0.23B
27.41
0.21B
26.80
0.11B
26.20
0.03B
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.