VOO Dark Pool Activity
Vanguard S&P 500 ETF
Data as of Oct 26, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 26, 2026, FINRA reported 2.1M VOO shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.2M of those shares (54.9%) were marked short or short-exempt, above VOO's 30-day rolling average of 51.4% (z-score 0.29). Over the last 10 FINRA sessions (Oct 13, 2026 – Oct 26, 2026), VOO's off-exchange short volume ratio ranged from 51.1% to 71.1% and averaged 60.6%; the latest reading is below that 10-session average.
Off-Exchange Volume
2.1M
Short Volume
1.2M
Short Volume Ratio
54.9%
30-Day Average
51.4%
z-score 0.29
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 13, 2026 | 3.3M | 2.1M | 62.4% |
| Oct 14, 2026 | 2.6M | 1.8M | 71.1% |
| Oct 15, 2026 | 3.3M | 1.7M | 51.1% |
| Oct 16, 2026 | 3.4M | 1.8M | 51.6% |
| Oct 19, 2026 | 2.0M | 1.3M | 62.0% |
| Oct 20, 2026 | 2.6M | 1.6M | 62.4% |
| Oct 21, 2026 | 2.0M | 1.3M | 64.3% |
| Oct 22, 2026 | 2.7M | 1.5M | 56.2% |
| Oct 23, 2026 | 2.1M | 1.5M | 69.6% |
| Oct 26, 2026 Latest | 2.1M | 1.2M | 54.9% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
VOO dark pool FAQ
- How much VOO off-exchange volume did FINRA report on Oct 26, 2026?
- FINRA's daily short sale volume file reported 2.1M VOO shares in publicly disseminated off-exchange trades on Oct 26, 2026; 1.2M of those shares (54.9%) were marked short or short-exempt.
- Is VOO's dark pool short volume ratio unusual right now?
- As of Oct 26, 2026, VOO's short volume ratio of 54.9% is above VOO's 30-day rolling average of 51.4% (z-score 0.29). 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.