MRK Dark Pool Activity
Merck & Company, Inc.
Data as of Sep 11, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 11, 2026, FINRA reported 2.9M MRK shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.3M of those shares (44.5%) were marked short or short-exempt, below MRK's 30-day rolling average of 45.6% (z-score -0.12).
Off-Exchange Volume
2.9M
Short Volume
1.3M
Short Volume Ratio
44.5%
30-Day Average
45.6%
z-score -0.12
MRK dark pool FAQ
- How much MRK off-exchange volume did FINRA report on Sep 11, 2026?
- FINRA's daily short sale volume file reported 2.9M MRK shares in publicly disseminated off-exchange trades on Sep 11, 2026; 1.3M of those shares (44.5%) were marked short or short-exempt.
- Is MRK's dark pool short volume ratio unusual right now?
- As of Sep 11, 2026, MRK's short volume ratio of 44.5% is below MRK's 30-day rolling average of 45.6% (z-score -0.12). 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.