V-Lab
TransMedics Group, Inc. GAS-GARCH Student T Volatility Analysis
Volatility prediction for Thursday, August 27th, 2026
1 Day
57.20%
decreased by 1.99%
1 Week
60.51%
increased by 1.32%
1 Month
65.49%
increased by 6.30%
Analysis last updated: Wednesday, August 26, 2026 at 10:32 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 2, 2019 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 4 trading days, meaning a shock loses half its impact after approximately 4 days. Returns follow a Student-t distribution with v = 3.95 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 18.6820 | 6.35*** |
α ARCH Response to squared shocks | 0.1093 | 6.34*** |
β GARCH Volatility persistence | 0.8411 | 37.20*** |
ν DF Student-t tail thickness | 3.9470 | 2.88*** |
Persistence:
0.841
Half-life:
4 days
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