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V-Lab

Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, October 26th, 2026

1 Day

37.70%

decreased by 2.01%

1 Week

40.81%

increased by 1.10%

1 Month

48.28%

increased by 8.57%

Analysis last updated: Sunday, October 25, 2026 at 02:13 AM UTC

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Date Range:

from

10/23/2024

to

10/23/2026

6M ·

1Y ·

2Y ·

5Y ·

All

graph of Hangzhou Prevail Optoelectronic Equipment Co., Ltd. GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 19, 2017 to Oct 23, 2026

Model Insight

Volatility shocks decay with a half-life of 11 trading days, meaning a shock loses half its impact after approximately 11 days. Returns follow a Student-t distribution with v = 4.64 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 11-day half-lifev = 4.64 · fat tails
ParamValuet-stat
ωlong-run14.2965
1.50
αscore0.1355
3.95***
βpersistence0.9388
22.08***
νDF4.6394
1.35

0.939

Persistence

11d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

14.2965
1.50
α

score

Weight on the scaled score

0.1355
3.95***
β

persistence

Volatility persistence

0.9388
22.08***
ν

DF

Student-t tail thickness

4.6394
1.35

Persistence:

0.939

Half-life:

11 days