V-Lab
TransMedics Group, Inc. EGARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
66.50%
decreased by 1.89%
1 Week
68.59%
increased by 0.20%
1 Month
71.34%
increased by 2.95%
Analysis last updated: Thursday, September 3, 2026 at 09:36 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 2, 2019 to Aug 28, 2026Model Insight
Volatility shocks decay with a half-life of 3 trading days, meaning a shock loses half its impact after approximately 3 days.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6380 | 2.25** |
α ARCH Response to squared shocks | 0.2879 | 3.35*** |
β GARCH Volatility persistence | 0.7905 | 8.73*** |
γ leverage Additional response to negative shocks | -0.0855 | -1.52 |
Persistence:
0.790
Half-life:
3 days
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