PFE Dark Pool Activity
PFIZER INC
Data as of Sep 11, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 11, 2026, FINRA reported 12.4M PFE shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 6.3M of those shares (50.6%) were marked short or short-exempt, above PFE's 30-day rolling average of 39.8% (z-score 1.52).
Off-Exchange Volume
12.4M
Short Volume
6.3M
Short Volume Ratio
50.6%
30-Day Average
39.8%
z-score 1.52
PFE dark pool FAQ
- How much PFE off-exchange volume did FINRA report on Sep 11, 2026?
- FINRA's daily short sale volume file reported 12.4M PFE shares in publicly disseminated off-exchange trades on Sep 11, 2026; 6.3M of those shares (50.6%) were marked short or short-exempt.
- Is PFE's dark pool short volume ratio unusual right now?
- As of Sep 11, 2026, PFE's short volume ratio of 50.6% is above PFE's 30-day rolling average of 39.8% (z-score 1.52). 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.