PSA· Public Storage
Dark pool · off-exchange short volume
Short ratio (latest)
71.7%
20-day average
62.9%
Off-exchange share (20d)
36%
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
338.01
0.72B
332.08
1.48B
326.15
3.00B
320.22
3.50B
314.29
2.56B
308.36
2.92B
302.43
4.22B
296.50
4.79B
290.57
5.38B
284.64
7.20B
278.71
7.93B
272.78
5.61B
266.85
7.45B
260.92
7.80B
254.99
9.53B
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.