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V-Lab

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

Volatility prediction for Monday, July 27th, 2026

1 Day

61.49%

decreased by 6.92%

1 Week

61.38%

decreased by 7.03%

1 Month

61.08%

decreased by 7.33%

Analysis last updated: Saturday, July 25, 2026 at 11:31 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 Jul 24, 2026

Model Insight

Volatility shocks decay with a half-life of 13 trading days, meaning a shock loses half its impact after approximately 13 days. Returns follow a Student-t distribution with v = 4.37 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

14.4776
5.20***
α

ARCH

Response to squared shocks

0.1223
15.93***
β

GARCH

Volatility persistence

0.9482
89.84***
ν

DF

Student-t tail thickness

4.3750
5.88***

Persistence:

0.948

Half-life:

13 days