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V-Lab

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

Volatility prediction for Thursday, October 8th, 2026

1 Day

56.07%

increased by 1.71%

1 Week

56.48%

increased by 2.12%

1 Month

57.63%

increased by 3.27%

Analysis last updated: Thursday, October 1, 2026 at 07:33 PM UTC

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Date Range:

from

09/30/2024

to

09/30/2026

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 Sep 30, 2026

Model Insight

Volatility shocks decay with a half-life of 12 trading days, meaning a shock loses half its impact after approximately 12 days. Returns follow a Student-t distribution with v = 4.27 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 12-day half-lifev = 4.27 · fat tails
ParamValuet-stat
ωconst14.2312
1.33
αARCH0.1215
3.93***
βGARCH0.9442
21.06***
νDF4.2662
1.48

0.944

Persistence

12d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

14.2312
1.33
α

ARCH

Response to squared shocks

0.1215
3.93***
β

GARCH

Volatility persistence

0.9442
21.06***
ν

DF

Student-t tail thickness

4.2662
1.48

Persistence:

0.944

Half-life:

12 days