Skip to main content
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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

All

graph of TransMedics Group, Inc. GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 2, 2019 to Aug 21, 2026

Model 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

ParameterValuet-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