VST Dark Pool Activity
Vistra Corp.
Data as of Sep 10, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 10, 2026, FINRA reported 2.0M VST shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.1M of those shares (55.9%) were marked short or short-exempt, above VST's 30-day rolling average of 46.7% (z-score 1.06).
Off-Exchange Volume
2.0M
Short Volume
1.1M
Short Volume Ratio
55.9%
30-Day Average
46.7%
z-score 1.06
VST dark pool FAQ
- How much VST off-exchange volume did FINRA report on Sep 10, 2026?
- FINRA's daily short sale volume file reported 2.0M VST shares in publicly disseminated off-exchange trades on Sep 10, 2026; 1.1M of those shares (55.9%) were marked short or short-exempt.
- Is VST's dark pool short volume ratio unusual right now?
- As of Sep 10, 2026, VST's short volume ratio of 55.9% is above VST's 30-day rolling average of 46.7% (z-score 1.06). 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.