Pre-market price movements and significant market activity for Interactive Brokers Group, Inc. Class A Common Stock ($IBKR). Each move is flagged by Z-score statistical significance — showing when $IBKR moved beyond its typical daily range. 4 significant moves detected in the last 30 days.
Current Market State
What May Be Driving IBKR?
No specific catalyst has been identified in the available market data for Interactive Brokers Group, Inc. Class A Common Stock (IBKR). The moves shown below are flagged based on statistical significance (Z-score ≥ 2), meaning IBKR moved beyond its typical daily range. A catalyst may exist — such as earnings, analyst action, sector momentum, or news — but has not yet been tagged to this ticker.
Interactive Brokers Group, Inc. Class A Common Stock operates in the Financial Services sector, specifically Security Brokers, Dealers & Flotation Companies. Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | RVOL |
|---|---|---|---|---|
| Oct 16, 2026 | Regular | $82.43 | -4.18% | 1.3× |
| Oct 16, 2026 | After-hours | $82.51 | -4.09% | 1.9× |
| Oct 14, 2026 | Regular | $84.23 | -3.73% | 0.8× |
| Oct 14, 2026 | After-hours | $84.01 | -3.98% | 1.2× |
About IBKR Premarket Movers
This page tracks unusual market activity for Interactive Brokers Group, Inc. Class A Common Stock (IBKR) across all trading sessions — pre-market (4:00 AM–9:30 AM ET), regular hours (9:30 AM–4:00 PM ET), and after-hours (4:00 PM–8:00 PM ET). A move is flagged as "unusual" when its Z-score reaches 2 or higher, meaning the price change is statistically significant relative to IBKR's recent daily volatility.
Z-score is calculated by comparing each move to the 20-day average return and standard deviation. A Z-score of 2.0 means the move is 2 standard deviations beyond the average — occurring in roughly the top 5% of daily moves. Relative volume (RVOL) compares current volume to the 20-day average volume at the same time of day, helping distinguish genuine institutional activity from noise.