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V-Lab

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

Volatility prediction for Monday, August 24th, 2026

1 Day

61.04%

decreased by 5.79%

1 Week

60.97%

decreased by 5.86%

1 Month

60.77%

decreased by 6.06%

Analysis last updated: Saturday, August 22, 2026 at 07:59 PM UTC

Date Range:

from

to

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 Aug 21, 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

ParameterValuet-statistic
ω

const

Unconditional variance weight

14.4537
5.12***
α

ARCH

Response to squared shocks

0.1212
15.50***
β

GARCH

Volatility persistence

0.9457
83.77***
ν

DF

Student-t tail thickness

4.2660
5.87***

Persistence:

0.946

Half-life:

12 days