IRM· Iron Mountain

Dark pool · off-exchange short volume

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

IRM's off-exchange short-volume ratio was 46.2% on 4 Nov 2026, below its 20-day average of 61.2%. Off-exchange trading was 39% of volume over the last 20 sessions. 7 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 6 Aug 2026.

Short ratio (latest)

46.2%

20-day average

61.2%

Off-exchange share (20d)

39%

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

133.03

0.21B

130.69

0.49B

128.36

0.86B

126.03

1.43B

123.69

1.55B

121.36

1.23B

119.02

0.79B

116.69

1.61B

114.36

1.79B

112.02

1.89B

109.69

1.35B

107.35

1.58B

105.02

1.52B

102.69

1.51B

100.35

2.25B

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.