MTZ Dark Pool Activity
MasTec, Inc.
Data as of Sep 10, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 10, 2026, FINRA reported 361K MTZ shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 176K of those shares (48.6%) were marked short or short-exempt, below MTZ's 30-day rolling average of 53.4% (z-score -0.31).
Off-Exchange Volume
361K
Short Volume
176K
Short Volume Ratio
48.6%
30-Day Average
53.4%
z-score -0.31
MTZ dark pool FAQ
- How much MTZ off-exchange volume did FINRA report on Sep 10, 2026?
- FINRA's daily short sale volume file reported 361K MTZ shares in publicly disseminated off-exchange trades on Sep 10, 2026; 176K of those shares (48.6%) were marked short or short-exempt.
- Is MTZ's dark pool short volume ratio unusual right now?
- As of Sep 10, 2026, MTZ's short volume ratio of 48.6% is below MTZ's 30-day rolling average of 53.4% (z-score -0.31). Meridian's dark pool model does not flag this reading as an anomaly.
- What does the dark pool short volume ratio measure?
- FINRA publishes daily short sale volume for trades reported off-exchange to its trade reporting facilities, which include dark pools and other off-exchange venues. The ratio divides FINRA's ShortVolume figure, which counts both short and short-exempt sales, by the total off-exchange shares reported for that day. It is not short interest and not a directional signal: market-maker hedging and reporting mechanics can raise it, so it is context for other signals.