EFX Dark Pool Activity
Equifax, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 657K EFX shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 345K of those shares (52.5%) were marked short or short-exempt, above EFX's 30-day rolling average of 51.0% (z-score 0.15). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), EFX's off-exchange short volume ratio ranged from 42.8% to 69.5% and averaged 54.2%; the latest reading is below that 10-session average.
Off-Exchange Volume
657K
Short Volume
345K
Short Volume Ratio
52.5%
30-Day Average
51.0%
z-score 0.15
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 526K | 267K | 50.7% |
| Oct 13, 2026 | 449K | 236K | 52.4% |
| Oct 14, 2026 | 506K | 262K | 51.7% |
| Oct 15, 2026 | 811K | 479K | 59.0% |
| Oct 16, 2026 | 960K | 495K | 51.6% |
| Oct 19, 2026 | 782K | 478K | 61.1% |
| Oct 20, 2026 | 1.8M | 1.3M | 69.5% |
| Oct 21, 2026 | 1.0M | 434K | 42.8% |
| Oct 22, 2026 | 1.3M | 656K | 51.1% |
| Oct 23, 2026 Latest | 657K | 345K | 52.5% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
EFX dark pool FAQ
- How much EFX off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 657K EFX shares in publicly disseminated off-exchange trades on Oct 23, 2026; 345K of those shares (52.5%) were marked short or short-exempt.
- Is EFX's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, EFX's short volume ratio of 52.5% is above EFX's 30-day rolling average of 51.0% (z-score 0.15). 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.