MLM· Martin Marietta Materials

Dark pool · off-exchange short volume

as of 2026-11-05

MLM's off-exchange short-volume ratio was 41.5% on 5 Nov 2026, below its 20-day average of 57.2%. Off-exchange trading was 43% of volume over the last 20 sessions. 15 sessions in the last six months had unusually large off-exchange dollar volume, the latest on 4 Nov 2026.

Short ratio (latest)

41.5%

20-day average

57.2%

Off-exchange share (20d)

43%

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

634.48

1.91B

623.35

3.63B

612.22

5.61B

601.08

5.81B

589.95

4.76B

578.82

5.11B

567.69

4.06B

556.56

5.34B

545.43

5.90B

534.30

6.28B

523.17

3.98B

512.04

3.50B

500.90

3.55B

489.77

3.29B

478.64

3.32B

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.