VO Dark Pool Activity
Vanguard Mid-Cap ETF
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 8.8M VO shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 498K of those shares (5.6%) were marked short or short-exempt, below VO's 30-day rolling average of 41.9% (z-score -3.96). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), VO's off-exchange short volume ratio ranged from 5.6% to 59.3% and averaged 38.7%; the latest reading is below that 10-session average.
Off-Exchange Volume
8.8M
Short Volume
498K
Short Volume Ratio
5.6%
30-Day Average
41.9%
z-score -3.96
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 1.0M | 358K | 35.8% |
| Oct 13, 2026 | 1.5M | 585K | 40.4% |
| Oct 14, 2026 | 1.8M | 1.0M | 57.4% |
| Oct 15, 2026 | 1.5M | 782K | 51.0% |
| Oct 16, 2026 | 1.8M | 461K | 26.1% |
| Oct 19, 2026 | 1.3M | 463K | 35.2% |
| Oct 20, 2026 | 1.7M | 1.0M | 59.3% |
| Oct 21, 2026 | 1.5M | 654K | 44.9% |
| Oct 22, 2026 | 2.2M | 682K | 31.3% |
| Oct 23, 2026 Latest | 8.8M | 498K | 5.6% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
VO dark pool FAQ
- How much VO off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 8.8M VO shares in publicly disseminated off-exchange trades on Oct 23, 2026; 498K of those shares (5.6%) were marked short or short-exempt.
- Is VO's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, VO's short volume ratio of 5.6% is below VO's 30-day rolling average of 41.9% (z-score -3.96). 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.