BLK Dark Pool — Off-Exchange & Short Volume

Market/Dark Pool/BLK

BLK· BlackRock

Dark pool · off-exchange short volume

Open interest GEX Full dossier

Short ratio (latest)

54.5%

20-day average

48.2%

Off-exchange share (20d)

30%

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

1209.21

0.03B

1187.62

1.02B

1166.02

2.89B

1144.43

4.93B

1122.84

7.40B

1101.24

9.60B

1079.65

12.3B

1058.06

15.2B

1036.46

11.3B

1014.87

9.19B

993.28

11.4B

971.69

11.1B

950.09

13.0B

928.50

9.28B

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.