Pre-market price movements and significant market activity for T-Mobile US, Inc. ($TMUS). Each move is flagged by Z-score statistical significance — showing when $TMUS moved beyond its typical daily range. 3 significant moves detected in the last 30 days.
Current Market State
What May Be Driving TMUS?
No specific catalyst has been identified in the available market data for T-Mobile US, Inc. (TMUS). The moves shown below are flagged based on statistical significance (Z-score ≥ 2), meaning TMUS 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.
T-Mobile US, Inc. operates in the Technology sector, specifically Radiotelephone Communications. Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | Z-Score | Rel. Vol. |
|---|---|---|---|---|---|
| Sep 17, 2026 | Regular | $166.76 | -5.39% | -3.30 | 1.2× |
| Sep 16, 2026 | Regular | $173.53 | -3.85% | -2.50 | 0.8× |
| Sep 11, 2026 | Regular | $183.34 | +3.49% | 2.12 | 0.6× |
About TMUS Premarket Movers
This page tracks unusual market activity for T-Mobile US, Inc. (TMUS) 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 TMUS'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.