Pre-market price movements and significant market activity for IDT Corporation Class B ($IDT). Each move is flagged by Z-score statistical significance — showing when $IDT moved beyond its typical daily range. 4 significant moves detected in the last 30 days.
Current Market State
What May Be Driving IDT?
IDT Corporation shares rose 2.61% as investors awaited its upcoming earnings report heading into Monday.
IDT Corporation Class B operates in the Comm Serv sector, specifically Telephone Communications (No Radiotelephone). Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | Z-Score | Rel. Vol. |
|---|---|---|---|---|---|
| Sep 28, 2026 | Regular | $69.01 | +2.30% | 2.28 | 0.8× |
| Sep 28, 2026 | After-hours | $72.01 | +3.52% | 3.41 | 1.2× |
| Sep 16, 2026 | Regular | $69.64 | -1.94% | -2.55 | 0.6× |
| Sep 16, 2026 | After-hours | $69.55 | -2.07% | -2.70 | 1.1× |
About IDT Premarket Movers
This page tracks unusual market activity for IDT Corporation Class B (IDT) 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 IDT'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.