FAST Dark Pool Activity
Fastenal Company
Data as of Sep 10, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 10, 2026, FINRA reported 2.5M FAST shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.6M of those shares (65.1%) were marked short or short-exempt, above FAST's 30-day rolling average of 62.6% (z-score 0.28).
Off-Exchange Volume
2.5M
Short Volume
1.6M
Short Volume Ratio
65.1%
30-Day Average
62.6%
z-score 0.28
FAST dark pool FAQ
- How much FAST off-exchange volume did FINRA report on Sep 10, 2026?
- FINRA's daily short sale volume file reported 2.5M FAST shares in publicly disseminated off-exchange trades on Sep 10, 2026; 1.6M of those shares (65.1%) were marked short or short-exempt.
- Is FAST's dark pool short volume ratio unusual right now?
- As of Sep 10, 2026, FAST's short volume ratio of 65.1% is above FAST's 30-day rolling average of 62.6% (z-score 0.28). 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.