IWM Dark Pool Activity
iShares Russell 2000 Index Fund
Data as of Oct 26, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 26, 2026, FINRA reported 4.5M IWM shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 2.9M of those shares (64.6%) were marked short or short-exempt, above IWM's 30-day rolling average of 61.0% (z-score 0.42). Over the last 10 FINRA sessions (Oct 13, 2026 – Oct 26, 2026), IWM's off-exchange short volume ratio ranged from 58.9% to 71.6% and averaged 66.1%; the latest reading is below that 10-session average.
Off-Exchange Volume
4.5M
Short Volume
2.9M
Short Volume Ratio
64.6%
30-Day Average
61.0%
z-score 0.42
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 13, 2026 | 8.3M | 5.2M | 63.1% |
| Oct 14, 2026 | 10.8M | 6.4M | 58.9% |
| Oct 15, 2026 | 9.1M | 6.4M | 70.1% |
| Oct 16, 2026 | 10.5M | 7.3M | 69.7% |
| Oct 19, 2026 | 6.2M | 4.1M | 65.7% |
| Oct 20, 2026 | 7.5M | 4.8M | 64.7% |
| Oct 21, 2026 | 4.2M | 3.0M | 71.6% |
| Oct 22, 2026 | 7.6M | 5.1M | 67.7% |
| Oct 23, 2026 | 5.9M | 3.8M | 65.2% |
| Oct 26, 2026 Latest | 4.5M | 2.9M | 64.6% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
IWM dark pool FAQ
- How much IWM off-exchange volume did FINRA report on Oct 26, 2026?
- FINRA's daily short sale volume file reported 4.5M IWM shares in publicly disseminated off-exchange trades on Oct 26, 2026; 2.9M of those shares (64.6%) were marked short or short-exempt.
- Is IWM's dark pool short volume ratio unusual right now?
- As of Oct 26, 2026, IWM's short volume ratio of 64.6% is above IWM's 30-day rolling average of 61.0% (z-score 0.42). 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.