ERFSF Dark Pool Activity
Eurofins Scientific Nante
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 1K ERFSF shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 282 of those shares (25.4%) were marked short or short-exempt, below ERFSF's 30-day rolling average of 40.5% (z-score -0.46). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), ERFSF's off-exchange short volume ratio ranged from 4.5% to 84.3% and averaged 53.4%; the latest reading is below that 10-session average.
Off-Exchange Volume
1K
Short Volume
282
Short Volume Ratio
25.4%
30-Day Average
40.5%
z-score -0.46
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 367 | 297 | 80.9% |
| Oct 13, 2026 | 2K | 1K | 56.0% |
| Oct 14, 2026 | 536 | 381 | 71.1% |
| Oct 15, 2026 | 1K | 976 | 81.3% |
| Oct 16, 2026 | 1K | 64 | 4.5% |
| Oct 19, 2026 | 574 | 172 | 30.0% |
| Oct 20, 2026 | 1K | 1K | 80.5% |
| Oct 21, 2026 | 636 | 536 | 84.3% |
| Oct 22, 2026 | 3K | 508 | 20.0% |
| Oct 23, 2026 Latest | 1K | 282 | 25.4% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
ERFSF dark pool FAQ
- How much ERFSF off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 1K ERFSF shares in publicly disseminated off-exchange trades on Oct 23, 2026; 282 of those shares (25.4%) were marked short or short-exempt.
- Is ERFSF's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, ERFSF's short volume ratio of 25.4% is below ERFSF's 30-day rolling average of 40.5% (z-score -0.46). 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.