Pre-market price movements and significant market activity for Chubb Limited ($CB). Each move is flagged by Z-score statistical significance — showing when $CB moved beyond its typical daily range. 2 significant moves detected in the last 30 days.
Current Market State
What May Be Driving CB?
No specific catalyst has been identified in the available market data for Chubb Limited (CB). The moves shown below are flagged based on statistical significance (Z-score ≥ 2), meaning CB 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.
Chubb Limited operates in the Financial Services sector, specifically Fire, Marine & Casualty Insurance. Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | RVOL |
|---|---|---|---|---|
| Oct 8, 2026 | Regular | $344.14 | +2.82% | 0.5× |
| Oct 8, 2026 | After-hours | $343.78 | +2.71% | 0.8× |
About CB Premarket Movers
This page tracks unusual market activity for Chubb Limited (CB) 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 CB'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.