IBKR Dark Pool Activity
Interactive Brokers Group, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 2.3M IBKR shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 410K of those shares (17.9%) were marked short or short-exempt, below IBKR's 30-day rolling average of 46.0% (z-score -2.86). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), IBKR's off-exchange short volume ratio ranged from 17.9% to 52.2% and averaged 34.5%; the latest reading is below that 10-session average.
Off-Exchange Volume
2.3M
Short Volume
410K
Short Volume Ratio
17.9%
30-Day Average
46.0%
z-score -2.86
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 1.3M | 668K | 52.2% |
| Oct 13, 2026 | 1.2M | 341K | 29.2% |
| Oct 14, 2026 | 1.8M | 668K | 38.1% |
| Oct 15, 2026 | 2.5M | 762K | 30.9% |
| Oct 16, 2026 | 3.1M | 1.3M | 42.1% |
| Oct 19, 2026 | 1.8M | 557K | 31.7% |
| Oct 20, 2026 | 1.4M | 405K | 28.9% |
| Oct 21, 2026 | 1.5M | 565K | 37.5% |
| Oct 22, 2026 | 1.6M | 571K | 36.8% |
| Oct 23, 2026 Latest | 2.3M | 410K | 17.9% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
IBKR dark pool FAQ
- How much IBKR off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 2.3M IBKR shares in publicly disseminated off-exchange trades on Oct 23, 2026; 410K of those shares (17.9%) were marked short or short-exempt.
- Is IBKR's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, IBKR's short volume ratio of 17.9% is below IBKR's 30-day rolling average of 46.0% (z-score -2.86). 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.